From 739bd194628aeb01991dc3c9ae16455e2cb1ab50 Mon Sep 17 00:00:00 2001 From: "Thomas F. K. Jorna" Date: Thu, 5 Feb 2026 16:16:08 +0100 Subject: [PATCH 1/7] feat: setup --- packages/jsonata-querying/SUBSET.md | 334 ++++++ packages/jsonata-querying/package.json | 37 + packages/jsonata-querying/src/ast-creator.ts | 19 + .../jsonata-querying/src/function-mapping.ts | 948 ++++++++++++++++++ packages/jsonata-querying/src/ideas.md | 44 + packages/jsonata-querying/src/index.test.ts | 1 + packages/jsonata-querying/src/index.ts | 132 +++ .../jsonata-querying/src/jsonata.overrides.ts | 362 +++++++ .../src/node-classification.ts | 376 +++++++ .../src/subset-validator.test.ts | 384 +++++++ .../jsonata-querying/src/subset-validator.ts | 474 +++++++++ .../src/translation-patterns.test.ts | 352 +++++++ .../src/translation-patterns.ts | 473 +++++++++ packages/jsonata-querying/tsconfig.json | 11 + 14 files changed, 3947 insertions(+) create mode 100644 packages/jsonata-querying/SUBSET.md create mode 100644 packages/jsonata-querying/package.json create mode 100644 packages/jsonata-querying/src/ast-creator.ts create mode 100644 packages/jsonata-querying/src/function-mapping.ts create mode 100644 packages/jsonata-querying/src/ideas.md create mode 100644 packages/jsonata-querying/src/index.test.ts create mode 100644 packages/jsonata-querying/src/index.ts create mode 100644 packages/jsonata-querying/src/jsonata.overrides.ts create mode 100644 packages/jsonata-querying/src/node-classification.ts create mode 100644 packages/jsonata-querying/src/subset-validator.test.ts create mode 100644 packages/jsonata-querying/src/subset-validator.ts create mode 100644 packages/jsonata-querying/src/translation-patterns.test.ts create mode 100644 packages/jsonata-querying/src/translation-patterns.ts create mode 100644 packages/jsonata-querying/tsconfig.json diff --git a/packages/jsonata-querying/SUBSET.md b/packages/jsonata-querying/SUBSET.md new file mode 100644 index 0000000000..2b0f0ba6ba --- /dev/null +++ b/packages/jsonata-querying/SUBSET.md @@ -0,0 +1,334 @@ +# JSONata-SQL Subset Specification + +This document specifies the subset of JSONata that can be translated to PostgreSQL queries. The goal is to provide a query language familiar to users of JSONata while executing entirely in the database. + +## Overview + +JSONata is a powerful JSON query and transformation language. However, not all of its features can be expressed in SQL. This specification defines: + +1. Which JSONata features are fully supported +2. Which features have partial or contextual support +3. Which features are not supported +4. How supported features translate to SQL + +## Variable Conventions + +The subset uses specific variable prefixes to distinguish between different contexts: + +| Variable | Meaning | SQL Equivalent | +|----------|---------|----------------| +| `$$tableName` | Table reference | `FROM tableName` | +| `$input.field` | Query parameter | Bound parameter value | +| `$varName` | CTE or subquery | `WITH varName AS (...)` | +| `$.field` | Current context field | Column reference | + +## Node Type Support + +### Fully Supported (Tier 1) + +These JSONata constructs translate directly to SQL: + +| JSONata | SQL Equivalent | Example | +|---------|---------------|---------| +| String literal | String literal | `"hello"` → `'hello'` | +| Number literal | Numeric literal | `42` → `42` | +| Boolean literal | Boolean literal | `true` → `TRUE` | +| Null literal | NULL | `null` → `NULL` | +| Field name | Column reference | `name` → `name` | +| Comparison operators | Comparison operators | `=`, `!=`, `<`, `<=`, `>`, `>=` | +| Boolean operators | Boolean operators | `and` → `AND`, `or` → `OR` | +| Arithmetic operators | Arithmetic operators | `+`, `-`, `*`, `/`, `%` | +| String concatenation | String concatenation | `&` → `||` | +| Conditional | CASE expression | `a ? b : c` → `CASE WHEN a THEN b ELSE c END` | +| Sort expression | ORDER BY | `^(>field)` → `ORDER BY field DESC` | + +### Partially Supported (Tier 2) + +These features work with constraints: + +| JSONata | SQL Equivalent | Constraints | +|---------|---------------|-------------| +| Regex literals | `~` or `~*` operators | Syntax and capability differences | +| Path expressions | FROM/JOIN/WHERE | First step must establish table context | +| Filter predicates | WHERE clause | Expression must be SQL-expressible | +| Binary `in` | `IN` or `= ANY` | RHS must be array literal or subquery | +| Range operator `..` | `generate_series()` | Both operands must be integers | +| Function calls | SQL functions | Only whitelisted functions | +| Array constructor | `ARRAY[]` | Elements must be SQL-expressible | +| Object constructor | `SELECT ... AS` or `json_build_object` | Keys must be string literals | + +### Contextually Supported (Tier 3) + +These features work only in specific contexts: + +| JSONata | Context | Notes | +|---------|---------|-------| +| `$$` variable | Table reference | Must be followed by table name | +| `$input` variable | Parameters | Values provided at query time | +| Other variables | CTE definition | Must be defined as subqueries | +| Block expressions | CTE chains | Variable bindings become CTEs | +| Bind expressions | CTE definition | `$x := expr` → `WITH x AS (expr)` | + +### Not Supported (Tier 4) + +These features cannot be translated to SQL: + +| JSONata Feature | Reason | +|-----------------|--------| +| Wildcard `*` | Requires schema knowledge at compile time | +| Descendant `**` | No SQL equivalent for recursive descent | +| Parent `%` | Complex scoping not available in SQL | +| Lambda definitions | Functions cannot be defined in SQL | +| Function chaining `~>` | Must be inlined at compile time | +| Partial application `?` | No SQL equivalent | +| Transform `\|...\|` | Mutation operation, not query | +| Focus binding `@` | Complex scoping | +| Index binding `#` | Complex scoping | +| `$eval()` | Dynamic evaluation not safe | +| `$map()`, `$filter()`, `$reduce()` | Require lambda functions | + +## Function Support + +### Fully Supported Functions + +| JSONata | PostgreSQL | Notes | +|---------|------------|-------| +| `$lowercase(s)` | `LOWER(s)` | | +| `$uppercase(s)` | `UPPER(s)` | | +| `$length(s)` | `LENGTH(s)` | | +| `$trim(s)` | `TRIM(s)` | | +| `$floor(n)` | `FLOOR(n)` | | +| `$ceil(n)` | `CEIL(n)` | | +| `$round(n, p)` | `ROUND(n, p)` | | +| `$abs(n)` | `ABS(n)` | | +| `$sqrt(n)` | `SQRT(n)` | | +| `$power(n, p)` | `POWER(n, p)` | | +| `$not(x)` | `NOT x` | | +| `$exists(x)` | `x IS NOT NULL` | | +| `$string(x)` | `CAST(x AS TEXT)` | | +| `$number(x)` | `CAST(x AS NUMERIC)` | | +| `$join(arr, sep)` | `ARRAY_TO_STRING(arr, sep)` | | +| `$base64encode(s)` | `ENCODE(s::bytea, 'base64')` | | +| `$base64decode(s)` | `CONVERT_FROM(DECODE(s, 'base64'), 'UTF8')` | | + +### Partially Supported Functions + +| JSONata | PostgreSQL | Constraints | +|---------|------------|-------------| +| `$substring(s, start, len)` | `SUBSTRING(s FROM start+1 FOR len)` | Index adjustment: JSONata is 0-based, PostgreSQL is 1-based | +| `$substringBefore(s, d)` | `SPLIT_PART(s, d, 1)` | | +| `$substringAfter(s, d)` | `SUBSTRING(s FROM POSITION(d IN s) + LENGTH(d))` | Behavior differs if delimiter not found | +| `$contains(s, pat)` | `POSITION(pat IN s) > 0` | Regex patterns use `~` operator instead | +| `$split(s, d)` | `STRING_TO_ARRAY(s, d)` | Limit parameter not supported | +| `$replace(s, from, to)` | `REPLACE(s, from, to)` | Regex uses `REGEXP_REPLACE` | +| `$match(s, pattern)` | `REGEXP_MATCHES(s, pattern)` | Return format differs | +| `$sum(arr)` | `SUM(...)` | Requires aggregate context | +| `$count(arr)` | `COUNT(...)` | Requires aggregate context | +| `$max(arr)` | `MAX(...)` | Requires aggregate context | +| `$min(arr)` | `MIN(...)` | Requires aggregate context | +| `$average(arr)` | `AVG(...)` | Requires aggregate context | +| `$distinct(arr)` | `DISTINCT` or `array_agg(DISTINCT ...)` | Context-dependent | +| `$now()` | `NOW()` | Format parameters not supported | +| `$millis()` | `EXTRACT(EPOCH FROM NOW()) * 1000` | | +| `$boolean(x)` | `CASE WHEN ...` | Truthiness rules differ | +| `$type(x)` | `pg_typeof(x)::text` | Type names differ | + +### Unsupported Functions + +The following functions cannot be translated: + +- Higher-order: `$map`, `$filter`, `$reduce`, `$single`, `$sort` (with comparator), `$each`, `$sift` +- URL encoding: `$encodeUrl`, `$decodeUrl`, `$encodeUrlComponent`, `$decodeUrlComponent` +- Formatting: `$formatInteger`, `$parseInteger`, `$pad` (centering) +- Other: `$eval`, `$error`, `$assert`, `$clone`, `$zip`, `$shuffle` + +## Translation Patterns + +### Basic Selection + +``` +JSONata: name +SQL: SELECT name FROM +``` + +### Filtering + +``` +JSONata: items[price > 100 and status = 'active'] +SQL: SELECT * FROM items WHERE price > 100 AND status = 'active' +``` + +### Sorting + +``` +JSONata: items^(>price, 100 ? "expensive" : "affordable" +SQL: CASE WHEN price > 100 THEN 'expensive' ELSE 'affordable' END +``` + +### String Operations + +``` +JSONata: firstName & ' ' & $uppercase(lastName) +SQL: firstName || ' ' || UPPER(lastName) +``` + +### Complete Query + +``` +JSONata: +items[status = 'active' and price > 100]^(>createdAt).{ + "id": id, + "name": $uppercase(name), + "total": $round(price * quantity, 2) +} + +SQL: +SELECT + id, + UPPER(name) AS name, + ROUND(price * quantity, 2) AS total +FROM items +WHERE status = 'active' AND price > 100 +ORDER BY createdAt DESC +``` + +## Constraints and Limitations + +### The Column Expression Problem + +Column references have restrictions on where they can appear: + +**Allowed:** +``` +items[price > 100] -- column directly in comparison +items[price * quantity > 1000] -- arithmetic on columns OK +items[$lowercase(name) = 'test'] -- function of column OK +``` + +**Not Allowed (would require algebraic rearrangement):** +``` +items[$round(price) < $input.maxPrice] -- column inside function compared to parameter +``` + +The recommendation is to ensure column references appear in positions where SQL can evaluate them directly. + +### Aggregate Context + +Aggregate functions (`$sum`, `$count`, `$max`, `$min`, `$average`) require special handling: + +1. When used on a filtered collection, they become subqueries +2. When used in a projection with GROUP BY, they become aggregate expressions + +``` +JSONata: items[price > $average(items.price)] +SQL: SELECT * FROM items WHERE price > (SELECT AVG(price) FROM items) +``` + +### Relations and Joins + +Path expressions that traverse relations require consumer-defined join configuration: + +```typescript +const schema = { + pubs: { + fields: { + typeId: { relation: { table: 'pub_types', foreignKey: 'id' } } + } + } +} +``` + +This allows `pubs.type.name` to generate appropriate JOINs. + +### JSONB Column Access + +For JSONB columns, path expressions use PostgreSQL's JSON operators: + +``` +JSONata: data.nested.field +SQL: data->'nested'->>'field' +``` + +## Implementation Notes + +### Validation + +Use `validateExpression(expr)` to check if an expression is in the supported subset: + +```typescript +import { validateExpression, isValid } from './subset-validator' + +const result = validateExpression('items[price > 100]') +if (result.valid) { + // proceed with translation +} else { + // handle errors + console.error(result.errors) +} +``` + +### Function Mapping + +Use `getFunctionMapping(name)` to get translation details for a function: + +```typescript +import { getFunctionMapping, isFunctionSupported } from './function-mapping' + +if (isFunctionSupported('lowercase')) { + const mapping = getFunctionMapping('lowercase') + // mapping.postgresEquivalent === 'LOWER(s)' +} +``` + +### Node Classification + +Use the classification constants to understand support levels: + +```typescript +import { + NODE_TYPE_CLASSIFICATION, + BINARY_OPERATOR_CLASSIFICATION, + SupportTier +} from './node-classification' + +const nodeSupport = NODE_TYPE_CLASSIFICATION['path'] +if (nodeSupport.tier === SupportTier.FULL) { + // fully supported +} +``` + +## Test Coverage + +The test suite validates: + +1. **Classification tests** (`subset-validator.test.ts`): Verify expressions are correctly classified as valid/invalid +2. **Translation tests** (`translation-patterns.test.ts`): Verify expected SQL translations for supported patterns +3. **AST structure tests**: Verify JSONata parsing produces expected AST shapes + +Run tests with: +```bash +pnpm test +``` + +## Future Considerations + +Features that could potentially be added with more work: + +1. **Wildcard expansion**: With schema introspection, `*` could expand to all known columns +2. **Limited parent references**: For simple cases, `%` could translate to lateral joins +3. **Index binding**: `#` could use `ROW_NUMBER()` window function +4. **Custom function registration**: Allow consumers to register SQL function mappings diff --git a/packages/jsonata-querying/package.json b/packages/jsonata-querying/package.json new file mode 100644 index 0000000000..2ae0c05ca4 --- /dev/null +++ b/packages/jsonata-querying/package.json @@ -0,0 +1,37 @@ +{ + "name": "@pubpub/jsonata-querying", + "type": "module", + "version": "0.0.1", + "exports": { + ".": "./dist/pubpub-jsonata-querying.js", + "./package.json": "./package.json" + }, + "scripts": { + "type-check": "tsc --noEmit", + "type-check:go": "tsgo --noEmit", + "test": "vitest run", + "test:watch": "vitest" + }, + "dependencies": { + "jsonata": "^2.1.0", + "kysely": "^0.27.2" + }, + "devDependencies": { + "@types/node": "^25.2.0", + "@typescript/native-preview": "catalog:", + "tsconfig": "workspace:*", + "typescript": "catalog:", + "vitest": "catalog:" + }, + "preconstruct": { + "entrypoints": [ + "index.ts" + ], + "exports": true, + "___experimentalFlags_WILL_CHANGE_IN_PATCH": { + "typeModule": true, + "distInRoot": true, + "importsConditions": true + } + } +} diff --git a/packages/jsonata-querying/src/ast-creator.ts b/packages/jsonata-querying/src/ast-creator.ts new file mode 100644 index 0000000000..f0221318da --- /dev/null +++ b/packages/jsonata-querying/src/ast-creator.ts @@ -0,0 +1,19 @@ +/** biome-ignore-all lint/suspicious/noConsole: console is used for debugging */ +import jsonata from "jsonata" + +const defaultQuery = `$$[size < $length($input.body.entries) and status = $input.status]^(>priority, created_at).{ + "title": $.title, + "snippet": $substring($.body, 0, $input.config.snippet_length), + "query_terms": $split($lower($input.query), " ") + }` + +export function createAst(query: string = defaultQuery) { + const ast = jsonata(query) + return ast.ast() +} + +if (import.meta.main) { + const args = process.argv.slice(2) + const ast = createAst(args[0]) + console.dir(ast, { depth: null }) +} diff --git a/packages/jsonata-querying/src/function-mapping.ts b/packages/jsonata-querying/src/function-mapping.ts new file mode 100644 index 0000000000..e12f21a30d --- /dev/null +++ b/packages/jsonata-querying/src/function-mapping.ts @@ -0,0 +1,948 @@ +import { SupportTier } from "./node-classification.js" + +export interface FunctionMapping { + jsonataName: string + jsonataSignature: string + tier: (typeof SupportTier)[keyof typeof SupportTier] + sqlEquivalent?: string + notes: string + constraints?: string[] + postgresEquivalent: string | null + argumentTransform?: string + examples: Array<{ + jsonata: string + sql: string + }> +} + +// aggregation functions +export const AGGREGATION_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "sum", + jsonataSignature: ":n>", + tier: SupportTier.PARTIAL, + postgresEquivalent: "SUM", + notes: "requires aggregate context or array unnesting", + examples: [ + { + jsonata: "$sum(prices)", + sql: "SUM(prices) -- in aggregate context", + }, + { + jsonata: "$sum([1, 2, 3])", + sql: "(SELECT SUM(v) FROM unnest(ARRAY[1, 2, 3]) AS v)", + }, + ], + constraints: [ + "on column: works in GROUP BY context", + "on literal array: requires unnest subquery", + ], + }, + { + jsonataName: "count", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "COUNT", + notes: "requires aggregate context", + examples: [ + { + jsonata: "$count(items)", + sql: "COUNT(items)", + }, + ], + constraints: ["works in GROUP BY context"], + }, + { + jsonataName: "max", + jsonataSignature: ":n>", + tier: SupportTier.PARTIAL, + postgresEquivalent: "MAX", + notes: "requires aggregate context", + examples: [ + { + jsonata: "$max(prices)", + sql: "MAX(prices)", + }, + ], + constraints: ["works in GROUP BY context"], + }, + { + jsonataName: "min", + jsonataSignature: ":n>", + tier: SupportTier.PARTIAL, + postgresEquivalent: "MIN", + notes: "requires aggregate context", + examples: [ + { + jsonata: "$min(prices)", + sql: "MIN(prices)", + }, + ], + constraints: ["works in GROUP BY context"], + }, + { + jsonataName: "average", + jsonataSignature: ":n>", + tier: SupportTier.PARTIAL, + postgresEquivalent: "AVG", + notes: "requires aggregate context", + examples: [ + { + jsonata: "$average(scores)", + sql: "AVG(scores)", + }, + ], + constraints: [ + "works in GROUP BY context", + "returns NUMERIC in postgres, not necessarily same precision as jsonata", + ], + }, +] + +// string functions +export const STRING_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "string", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "CAST(x AS TEXT) or x::TEXT", + notes: "type coercion to string", + examples: [ + { + jsonata: "$string(123)", + sql: "CAST(123 AS TEXT)", + }, + { + jsonata: "$string(true)", + sql: "CAST(TRUE AS TEXT)", + }, + ], + }, + { + jsonataName: "substring", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "SUBSTRING(s FROM start FOR length)", + argumentTransform: "start index is 0-based in jsonata, 1-based in postgres; add 1 to start", + notes: "index adjustment required", + examples: [ + { + jsonata: '$substring("hello", 1, 3)', + sql: "SUBSTRING('hello' FROM 2 FOR 3) -- 'ell'", + }, + { + jsonata: '$substring("hello", 2)', + sql: "SUBSTRING('hello' FROM 3) -- 'llo'", + }, + ], + constraints: [ + "jsonata uses 0-based indexing, postgres uses 1-based", + "negative start in jsonata counts from end, postgres doesn't support this directly", + ], + }, + { + jsonataName: "substringBefore", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "SPLIT_PART(s, delimiter, 1)", + notes: "gets text before first occurrence of delimiter", + examples: [ + { + jsonata: '$substringBefore("hello-world", "-")', + sql: "SPLIT_PART('hello-world', '-', 1) -- 'hello'", + }, + ], + }, + { + jsonataName: "substringAfter", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "SUBSTRING(s FROM POSITION(delimiter IN s) + LENGTH(delimiter))", + notes: "gets text after first occurrence of delimiter", + examples: [ + { + jsonata: '$substringAfter("hello-world", "-")', + sql: "SUBSTRING('hello-world' FROM POSITION('-' IN 'hello-world') + 1) -- 'world'", + }, + ], + constraints: [ + "returns empty string if delimiter not found in jsonata, behavior may differ", + ], + }, + { + jsonataName: "lowercase", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "LOWER(s)", + notes: "direct mapping", + examples: [ + { + jsonata: '$lowercase("HELLO")', + sql: "LOWER('HELLO')", + }, + ], + }, + { + jsonataName: "uppercase", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "UPPER(s)", + notes: "direct mapping", + examples: [ + { + jsonata: '$uppercase("hello")', + sql: "UPPER('hello')", + }, + ], + }, + { + jsonataName: "length", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "LENGTH(s) or CHAR_LENGTH(s)", + notes: "string length", + examples: [ + { + jsonata: '$length("hello")', + sql: "LENGTH('hello') -- 5", + }, + ], + }, + { + jsonataName: "trim", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "TRIM(s)", + notes: "removes leading and trailing whitespace", + examples: [ + { + jsonata: '$trim(" hello ")', + sql: "TRIM(' hello ')", + }, + ], + }, + { + jsonataName: "pad", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "LPAD/RPAD combination", + notes: "jsonata pads to center, postgres has LPAD/RPAD", + examples: [ + { + jsonata: '$pad("x", 5, "-")', + sql: "-- requires custom logic for centering, jsonata centers the string", + }, + ], + constraints: [ + "jsonata centers by default, postgres only has left/right pad", + "would need custom SQL function for exact behavior", + ], + }, + { + jsonataName: "contains", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "POSITION(pat IN s) > 0 or s LIKE '%' || pat || '%'", + notes: "substring containment check", + examples: [ + { + jsonata: '$contains("hello", "ell")', + sql: "POSITION('ell' IN 'hello') > 0", + }, + ], + constraints: [ + "when pattern is regex, maps to ~ or ~* operators", + "second arg can be string or regex in jsonata", + ], + }, + { + jsonataName: "match", + jsonataSignature: "n?:a>", + tier: SupportTier.PARTIAL, + postgresEquivalent: "REGEXP_MATCHES(s, pattern)", + notes: "regex matching with capture groups", + examples: [ + { + jsonata: '$match("abc123", /[a-z]+/)', + sql: "REGEXP_MATCHES('abc123', '[a-z]+')", + }, + ], + constraints: [ + "return format differs between jsonata and postgres", + "capture group handling is different", + ], + }, + { + jsonataName: "replace", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "REPLACE(s, from, to) or REGEXP_REPLACE", + notes: "string or regex replacement", + examples: [ + { + jsonata: '$replace("hello", "l", "L")', + sql: "REPLACE('hello', 'l', 'L') -- 'heLLo'", + }, + { + jsonata: '$replace("hello", /l/, "L")', + sql: "REGEXP_REPLACE('hello', 'l', 'L', 'g')", + }, + ], + constraints: [ + "jsonata replaces all by default, REPLACE does too", + "regex replacement needs REGEXP_REPLACE with 'g' flag", + "limit parameter (4th arg) has no direct postgres equivalent", + ], + }, + { + jsonataName: "split", + jsonataSignature: ">", + tier: SupportTier.PARTIAL, + postgresEquivalent: "STRING_TO_ARRAY(s, delimiter) or REGEXP_SPLIT_TO_ARRAY", + notes: "split string into array", + examples: [ + { + jsonata: '$split("a,b,c", ",")', + sql: "STRING_TO_ARRAY('a,b,c', ',')", + }, + ], + constraints: [ + "limit parameter has no direct equivalent", + "regex split needs REGEXP_SPLIT_TO_ARRAY", + ], + }, + { + jsonataName: "join", + jsonataSignature: "s?:s>", + tier: SupportTier.FULL, + postgresEquivalent: "ARRAY_TO_STRING(arr, separator)", + notes: "join array elements into string", + examples: [ + { + jsonata: "$join(['a', 'b', 'c'], ',')", + sql: "ARRAY_TO_STRING(ARRAY['a', 'b', 'c'], ',')", + }, + ], + }, +] + +// numeric functions +export const NUMERIC_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "number", + jsonataSignature: "<(nsb)-:n>", + tier: SupportTier.FULL, + postgresEquivalent: "CAST(x AS NUMERIC) or x::NUMERIC", + notes: "type coercion to number", + examples: [ + { + jsonata: '$number("123")', + sql: "CAST('123' AS NUMERIC)", + }, + ], + }, + { + jsonataName: "floor", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "FLOOR(n)", + notes: "direct mapping", + examples: [ + { + jsonata: "$floor(3.7)", + sql: "FLOOR(3.7) -- 3", + }, + ], + }, + { + jsonataName: "ceil", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "CEIL(n)", + notes: "direct mapping", + examples: [ + { + jsonata: "$ceil(3.2)", + sql: "CEIL(3.2) -- 4", + }, + ], + }, + { + jsonataName: "round", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "ROUND(n, precision)", + notes: "direct mapping", + examples: [ + { + jsonata: "$round(3.456, 2)", + sql: "ROUND(3.456, 2) -- 3.46", + }, + ], + constraints: ["precision defaults to 0 in both"], + }, + { + jsonataName: "abs", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "ABS(n)", + notes: "direct mapping", + examples: [ + { + jsonata: "$abs(-5)", + sql: "ABS(-5) -- 5", + }, + ], + }, + { + jsonataName: "sqrt", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "SQRT(n)", + notes: "direct mapping", + examples: [ + { + jsonata: "$sqrt(16)", + sql: "SQRT(16) -- 4", + }, + ], + }, + { + jsonataName: "power", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "POWER(n, p)", + notes: "direct mapping", + examples: [ + { + jsonata: "$power(2, 3)", + sql: "POWER(2, 3) -- 8", + }, + ], + }, + { + jsonataName: "random", + jsonataSignature: "<:n>", + tier: SupportTier.PARTIAL, + postgresEquivalent: "RANDOM()", + notes: "both return 0-1 but different distributions/seeds", + examples: [ + { + jsonata: "$random()", + sql: "RANDOM()", + }, + ], + constraints: ["non-deterministic, may affect query caching"], + }, +] + +// boolean functions +export const BOOLEAN_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "boolean", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "CAST(x AS BOOLEAN) with caveats", + notes: "jsonata truthiness rules differ from postgres", + examples: [ + { + jsonata: '$boolean("")', + sql: "CASE WHEN '' = '' THEN FALSE ELSE TRUE END -- jsonata: empty string is falsy", + }, + ], + constraints: [ + "jsonata: empty string, 0, null, empty array/object are falsy", + "postgres boolean casting is stricter", + ], + }, + { + jsonataName: "not", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "NOT", + notes: "logical negation", + examples: [ + { + jsonata: "$not(true)", + sql: "NOT TRUE", + }, + ], + }, + { + jsonataName: "exists", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "IS NOT NULL or EXISTS", + notes: "null check", + examples: [ + { + jsonata: "$exists(field)", + sql: "field IS NOT NULL", + }, + ], + }, +] + +// array functions +export const ARRAY_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "append", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "array_cat(arr1, arr2) or arr1 || arr2", + notes: "concatenate arrays", + examples: [ + { + jsonata: "$append([1, 2], [3, 4])", + sql: "ARRAY[1, 2] || ARRAY[3, 4]", + }, + ], + }, + { + jsonataName: "reverse", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "custom function or SELECT ... ORDER BY idx DESC with unnest", + notes: "no built-in array reverse in postgres", + examples: [ + { + jsonata: "$reverse([1, 2, 3])", + sql: "(SELECT array_agg(elem ORDER BY idx DESC) FROM unnest(ARRAY[1,2,3]) WITH ORDINALITY AS t(elem, idx))", + }, + ], + }, + { + jsonataName: "shuffle", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "ORDER BY RANDOM()", + notes: "randomize array order", + examples: [ + { + jsonata: "$shuffle([1, 2, 3])", + sql: "(SELECT array_agg(elem ORDER BY RANDOM()) FROM unnest(ARRAY[1,2,3]) AS elem)", + }, + ], + constraints: ["non-deterministic"], + }, + { + jsonataName: "distinct", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "DISTINCT or array_agg(DISTINCT ...)", + notes: "remove duplicates", + examples: [ + { + jsonata: "$distinct([1, 1, 2])", + sql: "(SELECT array_agg(DISTINCT elem) FROM unnest(ARRAY[1,1,2]) AS elem)", + }, + ], + }, + { + jsonataName: "sort", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "array_agg with ORDER BY", + notes: "sort array, optional comparator", + examples: [ + { + jsonata: "$sort([3, 1, 2])", + sql: "(SELECT array_agg(elem ORDER BY elem) FROM unnest(ARRAY[3,1,2]) AS elem)", + }, + ], + constraints: ["custom comparator function not supported"], + }, + { + jsonataName: "zip", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "zip multiple arrays together", + examples: [ + { + jsonata: "$zip([1, 2], [3, 4])", + sql: "-- no direct equivalent, would need complex unnest with ordinality", + }, + ], + }, +] + +// object functions +export const OBJECT_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "keys", + jsonataSignature: ">", + tier: SupportTier.PARTIAL, + postgresEquivalent: "jsonb_object_keys(obj)", + notes: "get object keys", + examples: [ + { + jsonata: '$keys({"a": 1, "b": 2})', + sql: '(SELECT array_agg(k) FROM jsonb_object_keys(\'{"a":1,"b":2}\'::jsonb) AS k)', + }, + ], + constraints: ["only works on jsonb columns/values"], + }, + { + jsonataName: "lookup", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "obj->key or obj->>key", + notes: "get value by key", + examples: [ + { + jsonata: '$lookup(obj, "key")', + sql: "obj->'key' -- or obj->>'key' for text", + }, + ], + }, + { + jsonataName: "spread", + jsonataSignature: ">", + tier: SupportTier.PARTIAL, + postgresEquivalent: "jsonb_each(obj)", + notes: "spread object to array of key-value pairs", + examples: [ + { + jsonata: '$spread({"a": 1})', + sql: "SELECT jsonb_build_object(key, value) FROM jsonb_each('{\"a\":1}'::jsonb)", + }, + ], + }, + { + jsonataName: "merge", + jsonataSignature: ":o>", + tier: SupportTier.PARTIAL, + postgresEquivalent: "jsonb || jsonb (concatenation)", + notes: "merge objects, later values override", + examples: [ + { + jsonata: '$merge([{"a": 1}, {"b": 2}])', + sql: "'{\"a\":1}'::jsonb || '{\"b\":2}'::jsonb", + }, + ], + constraints: ["array of objects needs reduction"], + }, + { + jsonataName: "each", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "iterate over object with callback", + examples: [], + constraints: ["requires lambda function"], + }, + { + jsonataName: "sift", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "filter object properties", + examples: [], + constraints: ["requires lambda function"], + }, +] + +// higher-order functions - mostly unsupported +export const HIGHER_ORDER_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "map", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "apply function to each element", + examples: [], + constraints: ["requires lambda function"], + }, + { + jsonataName: "filter", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "filter array by predicate", + examples: [], + constraints: ["requires lambda function"], + }, + { + jsonataName: "single", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "find single matching element", + examples: [], + constraints: ["requires lambda function"], + }, + { + jsonataName: "reduce", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "fold/reduce array", + examples: [], + constraints: ["requires lambda function"], + }, +] + +// date/time functions +export const DATETIME_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "now", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "NOW() or CURRENT_TIMESTAMP", + notes: "current timestamp", + examples: [ + { + jsonata: "$now()", + sql: "NOW()", + }, + ], + constraints: [ + "jsonata returns ISO string, postgres returns timestamp type", + "format parameters in jsonata have no direct equivalent", + ], + }, + { + jsonataName: "millis", + jsonataSignature: "<:n>", + tier: SupportTier.FULL, + postgresEquivalent: "EXTRACT(EPOCH FROM NOW()) * 1000", + notes: "current time as milliseconds", + examples: [ + { + jsonata: "$millis()", + sql: "EXTRACT(EPOCH FROM NOW()) * 1000", + }, + ], + }, + { + jsonataName: "toMillis", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "EXTRACT(EPOCH FROM timestamp) * 1000", + notes: "parse date string to milliseconds", + examples: [ + { + jsonata: '$toMillis("2024-01-15T00:00:00Z")', + sql: "EXTRACT(EPOCH FROM '2024-01-15T00:00:00Z'::TIMESTAMPTZ) * 1000", + }, + ], + constraints: ["format string parameter handling differs"], + }, + { + jsonataName: "fromMillis", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "TO_TIMESTAMP(ms / 1000)", + notes: "milliseconds to date string", + examples: [ + { + jsonata: "$fromMillis(1705276800000)", + sql: 'TO_CHAR(TO_TIMESTAMP(1705276800000 / 1000.0), \'YYYY-MM-DD"T"HH24:MI:SS"Z"\')', + }, + ], + constraints: ["format string parameters have different syntax"], + }, +] + +// encoding functions +export const ENCODING_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "base64encode", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "ENCODE(s::bytea, 'base64')", + notes: "base64 encoding", + examples: [ + { + jsonata: '$base64encode("hello")', + sql: "ENCODE('hello'::bytea, 'base64')", + }, + ], + }, + { + jsonataName: "base64decode", + jsonataSignature: "", + tier: SupportTier.FULL, + postgresEquivalent: "CONVERT_FROM(DECODE(s, 'base64'), 'UTF8')", + notes: "base64 decoding", + examples: [ + { + jsonata: '$base64decode("aGVsbG8=")', + sql: "CONVERT_FROM(DECODE('aGVsbG8=', 'base64'), 'UTF8')", + }, + ], + }, + { + jsonataName: "encodeUrlComponent", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "no built-in URL encoding in postgres", + examples: [], + constraints: ["would need custom function or extension"], + }, + { + jsonataName: "encodeUrl", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "no built-in URL encoding in postgres", + examples: [], + }, + { + jsonataName: "decodeUrlComponent", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "no built-in URL decoding in postgres", + examples: [], + }, + { + jsonataName: "decodeUrl", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "no built-in URL decoding in postgres", + examples: [], + }, +] + +// formatting functions +export const FORMATTING_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "formatNumber", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "TO_CHAR(n, format)", + notes: "number formatting with pattern", + examples: [ + { + jsonata: '$formatNumber(1234.5, "#,##0.00")', + sql: "TO_CHAR(1234.5, 'FM999,999,990.00')", + }, + ], + constraints: ["format string syntax differs between jsonata and postgres"], + }, + { + jsonataName: "formatBase", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "TO_HEX for base 16", + notes: "format number in different base", + examples: [ + { + jsonata: "$formatBase(255, 16)", + sql: "TO_HEX(255) -- 'ff'", + }, + ], + constraints: ["only base 16 (hex) has direct support"], + }, + { + jsonataName: "formatInteger", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "format integer as words", + examples: [], + constraints: ["no built-in number-to-words in postgres"], + }, + { + jsonataName: "parseInteger", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "parse words to integer", + examples: [], + constraints: ["no built-in words-to-number in postgres"], + }, +] + +// other functions +export const OTHER_FUNCTIONS: FunctionMapping[] = [ + { + jsonataName: "eval", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "dynamic expression evaluation", + examples: [], + constraints: ["cannot execute dynamic code in sql safely"], + }, + { + jsonataName: "clone", + jsonataSignature: "<(oa)-:o>", + tier: SupportTier.CONTEXTUAL, + postgresEquivalent: "value itself (sql values are immutable)", + notes: "deep clone, not needed in sql context", + examples: [], + }, + { + jsonataName: "error", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "throw error", + examples: [], + constraints: ["would need PL/pgSQL RAISE, not available in plain SQL"], + }, + { + jsonataName: "assert", + jsonataSignature: "", + tier: SupportTier.UNSUPPORTED, + postgresEquivalent: null, + notes: "assertion", + examples: [], + constraints: ["would need PL/pgSQL RAISE, not available in plain SQL"], + }, + { + jsonataName: "type", + jsonataSignature: "", + tier: SupportTier.PARTIAL, + postgresEquivalent: "pg_typeof(value)", + notes: "get type of value", + examples: [ + { + jsonata: "$type(123)", + sql: "pg_typeof(123)::text", + }, + ], + constraints: ["type names differ between jsonata and postgres"], + }, +] + +// all function mappings combined +export const ALL_FUNCTION_MAPPINGS: FunctionMapping[] = [ + ...AGGREGATION_FUNCTIONS, + ...STRING_FUNCTIONS, + ...NUMERIC_FUNCTIONS, + ...BOOLEAN_FUNCTIONS, + ...ARRAY_FUNCTIONS, + ...OBJECT_FUNCTIONS, + ...HIGHER_ORDER_FUNCTIONS, + ...DATETIME_FUNCTIONS, + ...ENCODING_FUNCTIONS, + ...FORMATTING_FUNCTIONS, + ...OTHER_FUNCTIONS, +] + +// lookup function by name +export function getFunctionMapping(name: string): FunctionMapping | undefined { + return ALL_FUNCTION_MAPPINGS.find((f) => f.jsonataName === name) +} + +// get all supported functions +export function getSupportedFunctions(): FunctionMapping[] { + return ALL_FUNCTION_MAPPINGS.filter((f) => f.tier !== SupportTier.UNSUPPORTED) +} + +// get all unsupported functions +export function getUnsupportedFunctions(): FunctionMapping[] { + return ALL_FUNCTION_MAPPINGS.filter((f) => f.tier === SupportTier.UNSUPPORTED) +} + +// check if a function is supported +export function isFunctionSupported(name: string): boolean { + const mapping = getFunctionMapping(name) + return mapping !== undefined && mapping.tier !== SupportTier.UNSUPPORTED +} diff --git a/packages/jsonata-querying/src/ideas.md b/packages/jsonata-querying/src/ideas.md new file mode 100644 index 0000000000..bdc1befff0 --- /dev/null +++ b/packages/jsonata-querying/src/ideas.md @@ -0,0 +1,44 @@ +# Possible ideas + + +``` +$$pubs[size < $length($input.body.entries) and status = $input.status]^(>priority, created_at).{ + "title": $.title, + "snippet": $substring($.body, 0, $input.config.snippet_length), + "query_terms": $split($lower($input.query), " ") +} +``` + + +Tricky: how to signal to the user that `size` is different? + + +Eg, this would not be allowed + +``` +$$[(size + 6) < $length($input.body.entries) and status = $input.status] +``` +or we would at least need to be able to extract the "+ 6" to the other side of the comparison. + +Most functions are kind of hard to invert + +``` +$$[($round(size)) < $length($input.body.entries)] +``` + + +We also can't really allow dynamic column creation (not even sure this is valid jsonata) + +``` +$$[($.($.type & "_id") = "pub")] + +``` + + +It would be amazing if we can have nested queries + +eg find all blog posts that are larger than the average size of journal articles +``` +$$[type = 'blog post' and size > $avg($$[type = "journal article"].size)] +``` + diff --git a/packages/jsonata-querying/src/index.test.ts b/packages/jsonata-querying/src/index.test.ts new file mode 100644 index 0000000000..8b13789179 --- /dev/null +++ b/packages/jsonata-querying/src/index.test.ts @@ -0,0 +1 @@ + diff --git a/packages/jsonata-querying/src/index.ts b/packages/jsonata-querying/src/index.ts new file mode 100644 index 0000000000..b091d39784 --- /dev/null +++ b/packages/jsonata-querying/src/index.ts @@ -0,0 +1,132 @@ +import jsonata from "jsonata" + +interface InterpolationBlock { + expression: string + startIndex: number + endIndex: number +} + +/** + * parses template string to find all {{ }} interpolation blocks + */ +function parseInterpolations(template: string): InterpolationBlock[] { + const blocks: InterpolationBlock[] = [] + let i = 0 + + while (i < template.length) { + // look for opening {{ + if (template[i] === "{" && template[i + 1] === "{") { + const startIndex = i + i += 2 // skip past {{ + + let braceDepth = 0 + let expression = "" + let foundClosing = false + + while (i < template.length) { + const char = template[i] + const nextChar = template[i + 1] + + // check for closing }} + if (char === "}" && nextChar === "}" && braceDepth === 0) { + foundClosing = true + blocks.push({ + expression: expression.trim(), + startIndex, + endIndex: i + 2, + }) + i += 2 // skip past }} + break + } + + if (char === "{") { + braceDepth++ + } else if (char === "}") { + braceDepth-- + } + + expression += char + i++ + } + + if (!foundClosing) { + throw new Error(`unclosed interpolation block starting at position ${startIndex}`) + } + } else { + i++ + } + } + + return blocks +} + +const determineMode = (template: string): "template" | "jsonata" => { + if (template.includes("{{")) { + return "template" + } + + return "jsonata" +} + +/** + * interpolates JSONata expressions in a template string + * + * @param template - template string with {{ $.expression }} placeholders or pure JSONata expression + * @param data - data to evaluate expressions against + * @param mode - "template" for {{ }} interpolation (always returns string), "jsonata" for pure JSONata (returns any type) + * @returns interpolated result (string for template mode, any JSON type for jsonata mode) + */ +export async function interpolate(template: string, data: unknown): Promise { + const mode = determineMode(template) + + // jsonata mode: evaluate entire input as pure JSONata expression + if (mode === "jsonata") { + const expression = jsonata(template) + const result = await expression.evaluate(data) + + if (result === undefined) { + throw new Error(`expression '${template}' returned undefined`) + } + + // jsonata sequences have a non-enumerable `sequence` property + // convert to plain array to avoid issues with deep equality checks + if (Array.isArray(result) && (result as any).sequence === true) { + return [...result] + } + + return result + } + + // template mode: parse {{ }} blocks and return string + const blocks = parseInterpolations(template) + + if (blocks.length === 0) { + return template + } + + let result = template + + // process blocks in reverse order to maintain correct indices for multiple interpolations + // otherwise wed have to offset the indices of all the blocks after the current one + for (let i = blocks.length - 1; i >= 0; i--) { + const block = blocks[i] + const expression = jsonata(block.expression) + const value = await expression.evaluate(data) + + if (value === undefined) { + throw new Error(`expression '${block.expression}' returned undefined`) + } + + // in template mode, we always convert values to strings + let stringValue: string + if (typeof value === "string") { + stringValue = value + } else { + stringValue = JSON.stringify(value) + } + + result = result.slice(0, block.startIndex) + stringValue + result.slice(block.endIndex) + } + + return result +} diff --git a/packages/jsonata-querying/src/jsonata.overrides.ts b/packages/jsonata-querying/src/jsonata.overrides.ts new file mode 100644 index 0000000000..b777a353ae --- /dev/null +++ b/packages/jsonata-querying/src/jsonata.overrides.ts @@ -0,0 +1,362 @@ +// Enhanced type definitions for jsonata AST analysis +// These extend the basic types from jsonata for our specific use case + +// re-export jsonata for convenience +import jsonata from "jsonata" +export { jsonata } +export default jsonata + +// ============================================================================ +// Base Node Types +// ============================================================================ + +export interface BaseNode { + position?: number + value?: unknown + keepArray?: boolean +} + +export interface AncestorSlot { + label: string + level: number + index: number +} + +// ============================================================================ +// Literal Nodes +// ============================================================================ + +export interface StringNode extends BaseNode { + type: "string" + value: string +} + +export interface NumberNode extends BaseNode { + type: "number" + value: number +} + +export interface ValueNode extends BaseNode { + type: "value" + value: boolean | null +} + +export interface RegexNode extends BaseNode { + type: "regex" + value: RegExp +} + +// ============================================================================ +// Identifier Nodes +// ============================================================================ + +export interface NameNode extends BaseNode { + type: "name" + value: string + tuple?: boolean + ancestor?: AncestorSlot +} + +export interface VariableNode extends BaseNode { + type: "variable" + value: string +} + +// ============================================================================ +// Wildcard Nodes +// ============================================================================ + +export interface WildcardNode extends BaseNode { + type: "wildcard" + value: "*" + tuple?: boolean + ancestor?: AncestorSlot +} + +export interface DescendantNode extends BaseNode { + type: "descendant" + value: "**" +} + +export interface ParentNode extends BaseNode { + type: "parent" + slot: AncestorSlot +} + +// ============================================================================ +// Operator Types +// ============================================================================ + +export type ArithmeticOperator = "+" | "-" | "*" | "/" | "%" +export type ComparisonOperator = "=" | "!=" | "<" | "<=" | ">" | ">=" +export type BooleanOperator = "and" | "or" +export type StringOperator = "&" +export type RangeOperator = ".." +export type InclusionOperator = "in" + +export type BinaryOperatorValue = + | ArithmeticOperator + | ComparisonOperator + | BooleanOperator + | StringOperator + | RangeOperator + | InclusionOperator + +// ============================================================================ +// Binary Expression Nodes +// ============================================================================ + +export interface BinaryNode extends BaseNode { + type: "binary" + value: BinaryOperatorValue + lhs: ExprNode + rhs: ExprNode +} + +// ============================================================================ +// Path Expression Nodes +// ============================================================================ + +export interface FilterStage { + type: "filter" + expr: ExprNode + position?: number +} + +export interface IndexStage { + type: "index" + value: string + position?: number +} + +export type Stage = FilterStage | IndexStage + +export interface SortTerm { + descending: boolean + expression: ExprNode +} + +export interface SortNode extends BaseNode { + type: "sort" + terms: SortTerm[] + stages?: Stage[] +} + +export interface GroupExpression { + lhs: [ExprNode, ExprNode][] + position?: number +} + +export interface PathStepExtensions { + stages?: Stage[] + predicate?: FilterStage[] + group?: GroupExpression + focus?: string + index?: string + tuple?: boolean + ancestor?: AncestorSlot + keepArray?: boolean + consarray?: boolean + nextFunction?: string +} + +export interface PathNode extends BaseNode { + type: "path" + steps: ((ExprNode & Partial) | SortNode)[] + keepSingletonArray?: boolean + tuple?: boolean + seekingParent?: AncestorSlot[] +} + +// ============================================================================ +// Bind Expression +// ============================================================================ + +export interface BindNode extends BaseNode { + type: "bind" + value: ":=" + lhs: VariableNode + rhs: ExprNode +} + +// ============================================================================ +// Apply Expression +// ============================================================================ + +export interface ApplyNode extends BaseNode { + type: "apply" + value: "~>" + lhs: ExprNode + rhs: ExprNode +} + +// ============================================================================ +// Unary Expression Nodes +// ============================================================================ + +export interface NegationNode extends BaseNode { + type: "unary" + value: "-" + expression: ExprNode +} + +export interface ArrayConstructorNode extends BaseNode { + type: "unary" + value: "[" + expressions: ExprNode[] + consarray?: boolean +} + +export interface ObjectConstructorNode extends BaseNode { + type: "unary" + value: "{" + lhs: [ExprNode, ExprNode][] +} + +export type UnaryNode = NegationNode | ArrayConstructorNode | ObjectConstructorNode + +// ============================================================================ +// Function Nodes +// ============================================================================ + +export interface FunctionNode extends BaseNode { + type: "function" + value: "(" + procedure: ExprNode + arguments: ExprNode[] + nextFunction?: string +} + +export interface PartialPlaceholderNode extends BaseNode { + type: "operator" + value: "?" +} + +export interface PartialNode extends BaseNode { + type: "partial" + value: "(" + procedure: ExprNode + arguments: (ExprNode | PartialPlaceholderNode)[] +} + +export interface LambdaArgument { + type: "variable" + value: string + position?: number +} + +export interface LambdaSignature { + validate: (args: unknown[], context: unknown) => unknown[] +} + +export interface LambdaNode extends BaseNode { + type: "lambda" + arguments: LambdaArgument[] + body: ExprNode + signature?: LambdaSignature + thunk?: boolean +} + +// ============================================================================ +// Condition Node +// ============================================================================ + +export interface ConditionNode extends BaseNode { + type: "condition" + condition: ExprNode + then: ExprNode + else?: ExprNode +} + +// ============================================================================ +// Block Node +// ============================================================================ + +export interface BlockNode extends BaseNode { + type: "block" + expressions: ExprNode[] + consarray?: boolean +} + +// ============================================================================ +// Transform Node +// ============================================================================ + +export interface TransformNode extends BaseNode { + type: "transform" + pattern: ExprNode + update: ExprNode + delete?: ExprNode +} + +// ============================================================================ +// Error Node +// ============================================================================ + +export interface JsonataError extends Error { + code: string + position: number + token: string + value?: unknown + value2?: unknown +} + +export interface ErrorNode extends BaseNode { + type: "error" + error: JsonataError + lhs?: ExprNode + remaining?: unknown[] +} + +// ============================================================================ +// Union Type of All Expression Nodes +// ============================================================================ + +export type ExprNode = + | StringNode + | NumberNode + | ValueNode + | RegexNode + | NameNode + | VariableNode + | WildcardNode + | DescendantNode + | ParentNode + | BinaryNode + | PathNode + | BindNode + | ApplyNode + | UnaryNode + | FunctionNode + | PartialNode + | LambdaNode + | ConditionNode + | BlockNode + | TransformNode + | SortNode + | ErrorNode + +// all possible node type strings +export type AllNodeTypes = + | "string" + | "number" + | "value" + | "regex" + | "name" + | "variable" + | "wildcard" + | "descendant" + | "parent" + | "path" + | "binary" + | "bind" + | "apply" + | "unary" + | "function" + | "partial" + | "lambda" + | "condition" + | "block" + | "transform" + | "sort" + | "error" diff --git a/packages/jsonata-querying/src/node-classification.ts b/packages/jsonata-querying/src/node-classification.ts new file mode 100644 index 0000000000..f2c4f246b3 --- /dev/null +++ b/packages/jsonata-querying/src/node-classification.ts @@ -0,0 +1,376 @@ +import type { AllNodeTypes, BinaryOperatorValue, PathStepExtensions } from "./jsonata.overrides.js" + +// support tiers for sql translation +export const SupportTier = { + // direct translation to sql with no special handling + FULL: "full", + // translatable but requires specific patterns or has edge cases + PARTIAL: "partial", + // only supported in specific contexts (eg parameter-only, or projection-only) + CONTEXTUAL: "contextual", + // not translatable to sql + UNSUPPORTED: "unsupported", +} as const + +export type SupportTier = (typeof SupportTier)[keyof typeof SupportTier] + +export interface NodeClassification { + tier: SupportTier + sqlEquivalent?: string + notes: string + constraints?: string[] +} + +// classification of all jsonata node types +export const NODE_TYPE_CLASSIFICATION: Record = { + // literals - all fully supported + string: { + tier: SupportTier.FULL, + sqlEquivalent: "string literal", + notes: "direct mapping to sql string literals", + }, + number: { + tier: SupportTier.FULL, + sqlEquivalent: "numeric literal", + notes: "direct mapping to sql numeric literals", + }, + value: { + tier: SupportTier.FULL, + sqlEquivalent: "TRUE/FALSE/NULL", + notes: "boolean and null literals map directly", + }, + regex: { + tier: SupportTier.PARTIAL, + sqlEquivalent: "~ or ~* operators, REGEXP_MATCHES", + notes: "postgres supports regex but with different syntax and capabilities", + constraints: [ + "some regex features may not translate exactly", + "flags handling differs between jsonata and postgres", + ], + }, + + // identifiers + name: { + tier: SupportTier.FULL, + sqlEquivalent: "column reference or jsonb path", + notes: "field names become column references or jsonb accessors", + constraints: [ + "must be a known column or jsonb path", + "backtick-quoted names need special handling", + ], + }, + variable: { + tier: SupportTier.CONTEXTUAL, + sqlEquivalent: "parameter binding, CTE reference, or table reference", + notes: "$$ becomes table context, $input becomes parameters, other variables may become CTEs", + constraints: [ + "$$ must be followed by table name", + "$input.* becomes query parameters", + "arbitrary variable names require CTE or parameter definition", + ], + }, + + // wildcards - mostly unsupported + wildcard: { + tier: SupportTier.UNSUPPORTED, + notes: "* wildcard requires schema knowledge at compile time to expand to all columns", + constraints: ["would need schema introspection to support"], + }, + descendant: { + tier: SupportTier.UNSUPPORTED, + notes: "** recursive descent has no sql equivalent without recursive CTEs for known structures", + }, + parent: { + tier: SupportTier.UNSUPPORTED, + notes: "% parent operator requires complex scoping that doesn't map to sql", + }, + + // paths + path: { + tier: SupportTier.PARTIAL, + sqlEquivalent: "FROM/JOIN/WHERE/SELECT composition", + notes: "path expressions form the core query structure", + constraints: [ + "first step must establish table context", + "subsequent steps can be column access, jsonb paths, or joins", + "filter stages become WHERE clauses", + "focus (@) and index (#) bindings are not supported", + ], + }, + + // binary operators + binary: { + tier: SupportTier.PARTIAL, + sqlEquivalent: "varies by operator", + notes: "most binary operators translate directly, some have constraints", + constraints: [ + "range operator (..) needs generate_series", + "in operator maps to IN or = ANY", + "string & maps to ||", + ], + }, + + // variable binding + bind: { + tier: SupportTier.CONTEXTUAL, + sqlEquivalent: "CTE (WITH clause)", + notes: "variable binding can translate to CTEs in certain patterns", + constraints: [ + "only useful for subquery extraction", + "cannot bind arbitrary runtime values", + ], + }, + + // function application + apply: { + tier: SupportTier.UNSUPPORTED, + notes: "~> operator has no sql equivalent, would need to be inlined at compile time", + }, + + // unary expressions (array/object constructors and negation) + unary: { + tier: SupportTier.PARTIAL, + sqlEquivalent: "ARRAY[], json_build_object, or unary minus", + notes: "depends on the specific unary operation", + constraints: [ + "negation (-) fully supported", + "array constructor needs ARRAY[] syntax", + "object constructor needs json_build_object or projection syntax", + ], + }, + + // function calls + function: { + tier: SupportTier.PARTIAL, + sqlEquivalent: "SQL functions (varies by function)", + notes: "many built-in functions have sql equivalents, see function mapping", + constraints: ["only whitelisted functions are supported"], + }, + + // partial application + partial: { + tier: SupportTier.UNSUPPORTED, + notes: "partial function application has no sql equivalent", + }, + + // lambda definitions + lambda: { + tier: SupportTier.UNSUPPORTED, + notes: "function definitions cannot be expressed in sql", + }, + + // conditional + condition: { + tier: SupportTier.FULL, + sqlEquivalent: "CASE WHEN ... THEN ... ELSE ... END", + notes: "ternary operator maps directly to CASE expression", + constraints: ["all branches must be sql-expressible"], + }, + + // block expressions + block: { + tier: SupportTier.CONTEXTUAL, + sqlEquivalent: "CTE chain or subquery", + notes: "blocks with variable bindings can become CTEs", + constraints: [ + "only the final expression determines the result", + "intermediate bindings must form valid CTEs", + ], + }, + + // transform + transform: { + tier: SupportTier.UNSUPPORTED, + notes: "transform operator is a mutation operation, not a query", + }, + + // sort + sort: { + tier: SupportTier.FULL, + sqlEquivalent: "ORDER BY", + notes: "sort terms map directly to ORDER BY clauses", + constraints: ["sort expressions must be sql-expressible"], + }, + + // error + error: { + tier: SupportTier.UNSUPPORTED, + notes: "error nodes indicate parse errors, not valid expressions", + }, +} + +// binary operator support classification +export const BINARY_OPERATOR_CLASSIFICATION: Record = { + // arithmetic - all fully supported + "+": { + tier: SupportTier.FULL, + sqlEquivalent: "+", + notes: "direct mapping", + }, + "-": { + tier: SupportTier.FULL, + sqlEquivalent: "-", + notes: "direct mapping", + }, + "*": { + tier: SupportTier.FULL, + sqlEquivalent: "*", + notes: "direct mapping", + }, + "/": { + tier: SupportTier.FULL, + sqlEquivalent: "/", + notes: "direct mapping, note integer division behavior may differ", + }, + "%": { + tier: SupportTier.FULL, + sqlEquivalent: "%", + notes: "modulo operator maps directly", + }, + + // comparison - all fully supported + "=": { + tier: SupportTier.FULL, + sqlEquivalent: "=", + notes: "equality comparison", + constraints: ["jsonata deep equality may not match sql for complex types"], + }, + "!=": { + tier: SupportTier.FULL, + sqlEquivalent: "<> or !=", + notes: "inequality comparison", + }, + "<": { + tier: SupportTier.FULL, + sqlEquivalent: "<", + notes: "less than", + }, + "<=": { + tier: SupportTier.FULL, + sqlEquivalent: "<=", + notes: "less than or equal", + }, + ">": { + tier: SupportTier.FULL, + sqlEquivalent: ">", + notes: "greater than", + }, + ">=": { + tier: SupportTier.FULL, + sqlEquivalent: ">=", + notes: "greater than or equal", + }, + + // boolean + and: { + tier: SupportTier.FULL, + sqlEquivalent: "AND", + notes: "logical and", + }, + or: { + tier: SupportTier.FULL, + sqlEquivalent: "OR", + notes: "logical or", + }, + + // string + "&": { + tier: SupportTier.FULL, + sqlEquivalent: "||", + notes: "string concatenation", + }, + + // range + "..": { + tier: SupportTier.PARTIAL, + sqlEquivalent: "generate_series(start, end)", + notes: "range operator maps to generate_series", + constraints: ["both operands must be integers", "returns a set, may need array_agg"], + }, + + // inclusion + in: { + tier: SupportTier.FULL, + sqlEquivalent: "IN (...) or = ANY(...)", + notes: "membership test", + constraints: ["rhs must be an array or subquery"], + }, +} + +// path step extension support +export interface PathExtensionClassification { + supported: boolean + notes: string +} + +export const PATH_EXTENSION_CLASSIFICATION: Record< + keyof PathStepExtensions, + PathExtensionClassification +> = { + stages: { + supported: true, + notes: "filter stages become WHERE clauses, index stages are not supported", + }, + predicate: { + supported: true, + notes: "predicates become WHERE clauses", + }, + group: { + supported: true, + notes: "group expressions become GROUP BY with aggregation", + }, + focus: { + supported: false, + notes: "@ focus binding requires complex scoping not available in sql", + }, + index: { + supported: false, + notes: "# index binding would require ROW_NUMBER but with complex scoping", + }, + tuple: { + supported: false, + notes: "internal optimization flag, not relevant for sql translation", + }, + ancestor: { + supported: false, + notes: "ancestor binding for % operator is not supported", + }, + keepArray: { + supported: true, + notes: "affects result wrapping, can be handled in post-processing", + }, + consarray: { + supported: false, + notes: "array construction within paths has limited sql support", + }, + nextFunction: { + supported: false, + notes: "function chaining syntax not supported", + }, +} + +// helper to check if a node type is supported in any tier +export function isNodeTypeSupported(nodeType: AllNodeTypes): boolean { + const classification = NODE_TYPE_CLASSIFICATION[nodeType] + return classification.tier !== SupportTier.UNSUPPORTED +} + +// helper to check if a binary operator is supported +export function isBinaryOperatorSupported(op: BinaryOperatorValue): boolean { + const classification = BINARY_OPERATOR_CLASSIFICATION[op] + return classification.tier !== SupportTier.UNSUPPORTED +} + +// collect all unsupported node types +export function getUnsupportedNodeTypes(): AllNodeTypes[] { + return (Object.entries(NODE_TYPE_CLASSIFICATION) as [AllNodeTypes, NodeClassification][]) + .filter(([_, c]) => c.tier === SupportTier.UNSUPPORTED) + .map(([type]) => type) +} + +// collect all fully supported node types +export function getFullySupportedNodeTypes(): AllNodeTypes[] { + return (Object.entries(NODE_TYPE_CLASSIFICATION) as [AllNodeTypes, NodeClassification][]) + .filter(([_, c]) => c.tier === SupportTier.FULL) + .map(([type]) => type) +} diff --git a/packages/jsonata-querying/src/subset-validator.test.ts b/packages/jsonata-querying/src/subset-validator.test.ts new file mode 100644 index 0000000000..f4a5f4b58d --- /dev/null +++ b/packages/jsonata-querying/src/subset-validator.test.ts @@ -0,0 +1,384 @@ +import { describe, expect, it } from "vitest" + +import { getSupportedFunctions, getUnsupportedFunctions } from "./function-mapping.js" +import { + BINARY_OPERATOR_CLASSIFICATION, + getFullySupportedNodeTypes, + getUnsupportedNodeTypes, + NODE_TYPE_CLASSIFICATION, + SupportTier, +} from "./node-classification.js" +import { isFullySupported, isValid, validateExpression } from "./subset-validator.js" + +describe("node type classification completeness", () => { + it("should classify all node types", () => { + const expectedTypes = [ + "string", + "number", + "value", + "regex", + "name", + "variable", + "wildcard", + "descendant", + "parent", + "path", + "binary", + "bind", + "apply", + "unary", + "function", + "partial", + "lambda", + "condition", + "block", + "transform", + "sort", + "error", + ] + + for (const type of expectedTypes) { + expect(NODE_TYPE_CLASSIFICATION).toHaveProperty(type) + } + }) + + it("should have unsupported types", () => { + const unsupported = getUnsupportedNodeTypes() + expect(unsupported).toContain("wildcard") + expect(unsupported).toContain("descendant") + expect(unsupported).toContain("parent") + expect(unsupported).toContain("apply") + expect(unsupported).toContain("partial") + expect(unsupported).toContain("lambda") + expect(unsupported).toContain("transform") + expect(unsupported).toContain("error") + }) + + it("should have fully supported types", () => { + const supported = getFullySupportedNodeTypes() + expect(supported).toContain("string") + expect(supported).toContain("number") + expect(supported).toContain("value") + expect(supported).toContain("name") + expect(supported).toContain("condition") + expect(supported).toContain("sort") + }) +}) + +describe("binary operator classification", () => { + it("should support all comparison operators", () => { + const comparisonOps = ["=", "!=", "<", "<=", ">", ">="] + for (const op of comparisonOps) { + const classification = + BINARY_OPERATOR_CLASSIFICATION[op as keyof typeof BINARY_OPERATOR_CLASSIFICATION] + expect(classification.tier).not.toBe(SupportTier.UNSUPPORTED) + } + }) + + it("should support boolean operators", () => { + expect(BINARY_OPERATOR_CLASSIFICATION["and"].tier).toBe(SupportTier.FULL) + expect(BINARY_OPERATOR_CLASSIFICATION["or"].tier).toBe(SupportTier.FULL) + }) + + it("should support arithmetic operators", () => { + const arithmeticOps = ["+", "-", "*", "/", "%"] + for (const op of arithmeticOps) { + const classification = + BINARY_OPERATOR_CLASSIFICATION[op as keyof typeof BINARY_OPERATOR_CLASSIFICATION] + expect(classification.tier).toBe(SupportTier.FULL) + } + }) +}) + +describe("function mapping", () => { + it("should have supported aggregate functions", () => { + const supported = getSupportedFunctions() + const names = supported.map((f) => f.jsonataName) + expect(names).toContain("sum") + expect(names).toContain("count") + expect(names).toContain("max") + expect(names).toContain("min") + expect(names).toContain("average") + }) + + it("should have supported string functions", () => { + const supported = getSupportedFunctions() + const names = supported.map((f) => f.jsonataName) + expect(names).toContain("lowercase") + expect(names).toContain("uppercase") + expect(names).toContain("length") + expect(names).toContain("trim") + expect(names).toContain("substring") + }) + + it("should have unsupported higher-order functions", () => { + const unsupported = getUnsupportedFunctions() + const names = unsupported.map((f) => f.jsonataName) + expect(names).toContain("map") + expect(names).toContain("filter") + expect(names).toContain("reduce") + }) +}) + +describe("expression validation - valid expressions", () => { + it("should validate simple literals", () => { + expect(isValid('"hello"')).toBe(true) + expect(isValid("42")).toBe(true) + expect(isValid("true")).toBe(true) + expect(isValid("null")).toBe(true) + }) + + it("should validate simple field access", () => { + expect(isValid("name")).toBe(true) + expect(isValid("user.name")).toBe(true) + expect(isValid("user.address.city")).toBe(true) + }) + + it("should validate comparison expressions", () => { + expect(isValid("price > 100")).toBe(true) + expect(isValid("name = 'John'")).toBe(true) + expect(isValid("age >= 18 and age <= 65")).toBe(true) + }) + + it("should validate filter predicates", () => { + expect(isValid("items[price > 100]")).toBe(true) + expect(isValid("users[active = true]")).toBe(true) + expect(isValid("orders[status = 'pending' and total > 50]")).toBe(true) + }) + + it("should validate sorting", () => { + expect(isValid("items^(price)")).toBe(true) + expect(isValid("items^(>price)")).toBe(true) + expect(isValid("items^(>price, { + expect(isValid('{"name": user.name, "age": user.age}')).toBe(true) + }) + + it("should validate supported functions", () => { + expect(isValid("$length(name)")).toBe(true) + expect(isValid("$lowercase(title)")).toBe(true) + expect(isValid("$round(price, 2)")).toBe(true) + expect(isValid("$abs(value)")).toBe(true) + }) + + it("should validate arithmetic expressions", () => { + expect(isValid("price * quantity")).toBe(true) + expect(isValid("total - discount")).toBe(true) + expect(isValid("(price * quantity) * (1 - discount)")).toBe(true) + }) + + it("should validate ternary conditions", () => { + expect(isValid('status = "active" ? "Yes" : "No"')).toBe(true) + expect(isValid("price > 100 ? price * 0.9 : price")).toBe(true) + }) + + it("should validate string concatenation", () => { + expect(isValid("firstName & ' ' & lastName")).toBe(true) + }) + + it("should validate in operator", () => { + expect(isValid("status in ['active', 'pending']")).toBe(true) + }) + + it("should validate array construction", () => { + expect(isValid("[1, 2, 3]")).toBe(true) + expect(isValid("[price, quantity, total]")).toBe(true) + }) + + it("should validate negation", () => { + expect(isValid("-price")).toBe(true) + expect(isValid("-5")).toBe(true) + }) + + it("should validate complex nested expressions", () => { + const expr = `items[price > 100 and status = 'active']^(>price).{ + "name": name, + "total": price * quantity + }` + expect(isValid(expr)).toBe(true) + }) +}) + +describe("expression validation - invalid expressions", () => { + it("should reject wildcard", () => { + const result = validateExpression("user.*") + expect(result.valid).toBe(false) + expect(result.errors.some((e) => e.nodeType === "wildcard")).toBe(true) + }) + + it("should reject descendant operator", () => { + const result = validateExpression("**.name") + expect(result.valid).toBe(false) + expect(result.errors.some((e) => e.nodeType === "descendant")).toBe(true) + }) + + it("should reject lambda definitions", () => { + const result = validateExpression("function($x) { $x * 2 }") + expect(result.valid).toBe(false) + expect(result.errors.some((e) => e.nodeType === "lambda")).toBe(true) + }) + + it("should reject apply/chaining operator", () => { + const result = validateExpression("items ~> $sum()") + expect(result.valid).toBe(false) + expect(result.errors.some((e) => e.nodeType === "apply")).toBe(true) + }) + + it("should reject transform operator", () => { + const result = validateExpression('| user | {"active": true} |') + expect(result.valid).toBe(false) + expect(result.errors.some((e) => e.nodeType === "transform")).toBe(true) + }) + + it("should reject partial application", () => { + const result = validateExpression("$add(?, 5)") + expect(result.valid).toBe(false) + expect(result.errors.some((e) => e.nodeType === "partial")).toBe(true) + }) + + it("should reject unsupported functions", () => { + const result = validateExpression("$map(items, function($x) { $x * 2 })") + expect(result.valid).toBe(false) + expect( + result.errors.some( + (e) => e.message.includes("$map") && e.message.includes("not supported") + ) + ).toBe(true) + }) + + it("should reject $eval", () => { + const result = validateExpression('$eval("1 + 2")') + expect(result.valid).toBe(false) + }) + + it("should reject $filter", () => { + const result = validateExpression("$filter(items, function($x) { $x > 5 })") + expect(result.valid).toBe(false) + }) + + it("should reject $reduce", () => { + const result = validateExpression("$reduce(items, function($acc, $x) { $acc + $x }, 0)") + expect(result.valid).toBe(false) + }) +}) + +describe("expression validation - warnings", () => { + it("should warn about unknown functions", () => { + const result = validateExpression("$myCustomFunction(x)") + // should be valid but with warning + expect(result.valid).toBe(true) + expect(result.warnings.some((w) => w.includes("$myCustomFunction"))).toBe(true) + }) + + it("should warn about variables needing CTE definition", () => { + const result = validateExpression("$myVar + 1") + expect(result.valid).toBe(true) + expect(result.warnings.some((w) => w.includes("$myVar"))).toBe(true) + }) + + it("should provide constraint warnings for partial support", () => { + // range operator within array context + const result = validateExpression("[1..10]") + // range operator is partial support, should be valid + expect(result.valid).toBe(true) + // constraints from binary operator should generate warnings + expect(result.warnings.some((w) => w.includes("..") || w.includes("range"))).toBe(true) + }) +}) + +describe("expression validation - edge cases from ideas.md", () => { + it("should validate the main example from ideas.md", () => { + // this is the target syntax from ideas.md + const expr = `items[size < 100 and status = 'active']^(>priority, createdAt).{ + "title": title, + "snippet": $substring(body, 0, 50) + }` + const result = validateExpression(expr) + expect(result.valid).toBe(true) + }) + + it("should validate nested subquery pattern", () => { + // from ideas.md: find items where size > average size of another type + // note: the actual $avg on a subquery would need special handling + const result = validateExpression("items[type = 'blog' and size > 100]") + expect(result.valid).toBe(true) + }) + + it("should validate complex filter with arithmetic", () => { + // this should be valid - arithmetic in filter + const result = validateExpression("items[(price * quantity) > 1000]") + expect(result.valid).toBe(true) + }) +}) + +describe("isFullySupported vs isValid", () => { + it("should distinguish between fully supported and valid with warnings", () => { + // simple literal - fully supported + expect(isFullySupported("42")).toBe(true) + expect(isValid("42")).toBe(true) + + // custom variable - valid but with warnings + const customVarExpr = "$customVar" + expect(isValid(customVarExpr)).toBe(true) + expect(isFullySupported(customVarExpr)).toBe(false) + + // unsupported - neither valid nor fully supported + expect(isValid("user.*")).toBe(false) + expect(isFullySupported("user.*")).toBe(false) + }) +}) + +describe("parse error handling", () => { + it("should handle syntax errors gracefully", () => { + const result = validateExpression("invalid[[[syntax") + expect(result.valid).toBe(false) + expect(result.errors[0].message).toContain("Parse error") + }) + + it("should handle empty expression", () => { + const result = validateExpression("") + // empty might parse to undefined or error + expect(result.valid).toBe(false) + }) +}) + +describe("complex real-world patterns", () => { + it("should validate query with multiple filters and projection", () => { + const expr = `orders[status = 'completed' and total > 100]^(>createdAt).{ + "id": id, + "customer": customer.name, + "amount": $round(total, 2), + "date": createdAt + }` + expect(isValid(expr)).toBe(true) + }) + + it("should validate query with string functions", () => { + const expr = `users[$contains($lowercase(email), 'gmail')].{ + "name": $uppercase(firstName) & ' ' & $uppercase(lastName), + "email": email + }` + expect(isValid(expr)).toBe(true) + }) + + it("should validate query with numeric calculations", () => { + const expr = `products[price > 0].{ + "name": name, + "priceWithTax": $round(price * 1.2, 2), + "discount": price > 100 ? $round(price * 0.1, 2) : 0 + }` + expect(isValid(expr)).toBe(true) + }) + + it("should validate query with in operator", () => { + const expr = "items[category in ['electronics', 'books', 'clothing']]" + expect(isValid(expr)).toBe(true) + }) + + it("should validate chained filters", () => { + const expr = "items[active = true][price > 50][stock > 0]" + expect(isValid(expr)).toBe(true) + }) +}) diff --git a/packages/jsonata-querying/src/subset-validator.ts b/packages/jsonata-querying/src/subset-validator.ts new file mode 100644 index 0000000000..0e2a496e88 --- /dev/null +++ b/packages/jsonata-querying/src/subset-validator.ts @@ -0,0 +1,474 @@ +import type { + ArrayConstructorNode, + BinaryNode, + BlockNode, + ConditionNode, + FunctionNode, + NegationNode, + ObjectConstructorNode, + PathNode, + SortNode, + UnaryNode, + VariableNode, +} from "./jsonata.overrides.js" + +import jsonata from "jsonata" + +import { getFunctionMapping } from "./function-mapping.js" +import { + BINARY_OPERATOR_CLASSIFICATION, + NODE_TYPE_CLASSIFICATION, + PATH_EXTENSION_CLASSIFICATION, + SupportTier, +} from "./node-classification.js" + +export interface ValidationError { + message: string + nodeType: string + position?: number + path: string[] +} + +export interface ValidationResult { + valid: boolean + errors: ValidationError[] + warnings: string[] +} + +// using any for node types since the jsonata types don't fully match runtime +type AstNode = jsonata.ExprNode | { type: string; [key: string]: unknown } + +// validate an entire expression +export function validateExpression(expr: string): ValidationResult { + const errors: ValidationError[] = [] + const warnings: string[] = [] + + let ast: AstNode + try { + ast = jsonata(expr).ast() as AstNode + } catch (e) { + return { + valid: false, + errors: [ + { + message: `Parse error: ${(e as Error).message}`, + nodeType: "error", + path: [], + }, + ], + warnings: [], + } + } + + validateNode(ast, [], errors, warnings) + + return { + valid: errors.length === 0, + errors, + warnings, + } +} + +// recursively validate a node +function validateNode( + node: AstNode, + path: string[], + errors: ValidationError[], + warnings: string[] +): void { + const nodeType = node.type as string + const classification = + NODE_TYPE_CLASSIFICATION[nodeType as keyof typeof NODE_TYPE_CLASSIFICATION] + + if (!classification) { + // unknown node type + warnings.push(`Unknown node type '${nodeType}' at ${path.join(".")}`) + return + } + + if (classification.tier === SupportTier.UNSUPPORTED) { + errors.push({ + message: `Node type '${nodeType}' is not supported: ${classification.notes}`, + nodeType, + position: (node as { position?: number }).position, + path, + }) + return + } + + if (classification.tier === SupportTier.CONTEXTUAL) { + warnings.push( + `Node type '${nodeType}' at ${path.join(".")} has contextual support: ${classification.notes}` + ) + } + + // type-specific validation + switch (nodeType) { + case "binary": + validateBinaryNode(node, path, errors, warnings) + break + case "path": + validatePathNode(node, path, errors, warnings) + break + case "function": + validateFunctionNode(node, path, errors, warnings) + break + case "unary": + validateUnaryNode(node, path, errors, warnings) + break + case "condition": + validateConditionNode(node, path, errors, warnings) + break + case "block": + validateBlockNode(node, path, errors, warnings) + break + case "variable": + validateVariableNode(node, path, errors, warnings) + break + case "sort": + validateSortNode(node, path, errors, warnings) + break + default: + // literals and simple nodes are fine + break + } +} + +function validateBinaryNode( + node: AstNode, + path: string[], + errors: ValidationError[], + warnings: string[] +): void { + const binaryNode = node as unknown as BinaryNode + const opClassification = BINARY_OPERATOR_CLASSIFICATION[binaryNode.value] + + if (!opClassification) { + errors.push({ + message: `Unknown binary operator '${binaryNode.value}'`, + nodeType: "binary", + position: binaryNode.position, + path, + }) + return + } + + if (opClassification.tier === SupportTier.UNSUPPORTED) { + errors.push({ + message: `Binary operator '${binaryNode.value}' is not supported`, + nodeType: "binary", + position: binaryNode.position, + path, + }) + return + } + + if (opClassification.constraints) { + for (const constraint of opClassification.constraints) { + warnings.push(`Operator '${binaryNode.value}': ${constraint}`) + } + } + + validateNode(binaryNode.lhs as AstNode, [...path, "lhs"], errors, warnings) + validateNode(binaryNode.rhs as AstNode, [...path, "rhs"], errors, warnings) +} + +function validatePathNode( + node: AstNode, + path: string[], + errors: ValidationError[], + warnings: string[] +): void { + const pathNode = node as unknown as PathNode + + // check for unsupported path extensions + if (pathNode.seekingParent && pathNode.seekingParent.length > 0) { + errors.push({ + message: "Parent operator (%) references are not supported", + nodeType: "path", + position: pathNode.position, + path, + }) + } + + if (pathNode.tuple) { + warnings.push("Path with tuple streaming may have limited support") + } + + const steps = pathNode.steps || [] + for (let i = 0; i < steps.length; i++) { + const step = steps[i] as AstNode & Record + const stepPath = [...path, `steps[${i}]`] + + // check for sort node in step + if (step.type === "sort") { + validateSortNode(step, stepPath, errors, warnings) + continue + } + + // validate the step expression itself + validateNode(step, stepPath, errors, warnings) + + // check path step extensions + if (step.focus) { + if (!PATH_EXTENSION_CLASSIFICATION.focus.supported) { + errors.push({ + message: `Focus binding (@) is not supported: ${PATH_EXTENSION_CLASSIFICATION.focus.notes}`, + nodeType: "path", + position: step.position as number | undefined, + path: stepPath, + }) + } + } + + if (step.index) { + if (!PATH_EXTENSION_CLASSIFICATION.index.supported) { + errors.push({ + message: `Index binding (#) is not supported: ${PATH_EXTENSION_CLASSIFICATION.index.notes}`, + nodeType: "path", + position: step.position as number | undefined, + path: stepPath, + }) + } + } + + if (step.ancestor) { + errors.push({ + message: "Ancestor reference (%) is not supported", + nodeType: "path", + position: step.position as number | undefined, + path: stepPath, + }) + } + + // validate filter stages + const stages = step.stages as + | Array<{ type: string; expr?: AstNode; position?: number }> + | undefined + if (stages) { + for (let j = 0; j < stages.length; j++) { + const stage = stages[j] + if (stage.type === "filter" && stage.expr) { + validateNode(stage.expr, [...stepPath, `stages[${j}].expr`], errors, warnings) + } else if (stage.type === "index") { + errors.push({ + message: "Index stage (#) is not supported in filters", + nodeType: "path", + position: stage.position, + path: [...stepPath, `stages[${j}]`], + }) + } + } + } + + const predicate = step.predicate as Array<{ type: string; expr: AstNode }> | undefined + if (predicate) { + for (let j = 0; j < predicate.length; j++) { + const pred = predicate[j] + validateNode(pred.expr, [...stepPath, `predicate[${j}].expr`], errors, warnings) + } + } + + const group = step.group as { lhs: [AstNode, AstNode][] } | undefined + if (group) { + // group expressions become GROUP BY + for (let j = 0; j < group.lhs.length; j++) { + const [key, value] = group.lhs[j] + validateNode(key, [...stepPath, `group[${j}].key`], errors, warnings) + validateNode(value, [...stepPath, `group[${j}].value`], errors, warnings) + } + } + } +} + +function validateFunctionNode( + node: AstNode, + path: string[], + errors: ValidationError[], + warnings: string[] +): void { + const funcNode = node as unknown as FunctionNode + + // get the function name + let functionName: string | null = null + const procedure = funcNode.procedure as AstNode + + if (procedure.type === "variable") { + functionName = (procedure as unknown as VariableNode).value + } else if (procedure.type === "path") { + // could be a path to a function, not supported + errors.push({ + message: "Function references via paths are not supported", + nodeType: "function", + position: funcNode.position, + path, + }) + return + } + + if (functionName) { + const mapping = getFunctionMapping(functionName) + + if (!mapping) { + // unknown function - might be user-defined + warnings.push( + `Unknown function '$${functionName}' - user-defined functions are not supported in SQL translation` + ) + } else if (mapping.tier === SupportTier.UNSUPPORTED) { + errors.push({ + message: `Function '$${functionName}' is not supported: ${mapping.notes}`, + nodeType: "function", + position: funcNode.position, + path, + }) + } else if (mapping.constraints) { + for (const constraint of mapping.constraints) { + warnings.push(`Function '$${functionName}': ${constraint}`) + } + } + } + + // validate arguments + const args = funcNode.arguments || [] + for (let i = 0; i < args.length; i++) { + validateNode(args[i] as AstNode, [...path, `arguments[${i}]`], errors, warnings) + } +} + +function validateUnaryNode( + node: AstNode, + path: string[], + errors: ValidationError[], + warnings: string[] +): void { + const unaryNode = node as unknown as UnaryNode + + if (unaryNode.value === "-") { + // negation + const negNode = unaryNode as NegationNode + validateNode(negNode.expression as AstNode, [...path, "expression"], errors, warnings) + } else if (unaryNode.value === "[") { + // array constructor + const arrNode = unaryNode as ArrayConstructorNode + const expressions = arrNode.expressions || [] + for (let i = 0; i < expressions.length; i++) { + validateNode( + expressions[i] as AstNode, + [...path, `expressions[${i}]`], + errors, + warnings + ) + } + } else if (unaryNode.value === "{") { + // object constructor + const objNode = unaryNode as ObjectConstructorNode + const lhs = objNode.lhs || [] + for (let i = 0; i < lhs.length; i++) { + const [key, value] = lhs[i] + validateNode(key as AstNode, [...path, `lhs[${i}].key`], errors, warnings) + validateNode(value as AstNode, [...path, `lhs[${i}].value`], errors, warnings) + } + } +} + +function validateConditionNode( + node: AstNode, + path: string[], + errors: ValidationError[], + warnings: string[] +): void { + const condNode = node as unknown as ConditionNode + validateNode(condNode.condition as AstNode, [...path, "condition"], errors, warnings) + validateNode(condNode.then as AstNode, [...path, "then"], errors, warnings) + if (condNode.else) { + validateNode(condNode.else as AstNode, [...path, "else"], errors, warnings) + } +} + +function validateBlockNode( + node: AstNode, + path: string[], + errors: ValidationError[], + warnings: string[] +): void { + const blockNode = node as unknown as BlockNode + const expressions = blockNode.expressions || [] + for (let i = 0; i < expressions.length; i++) { + validateNode(expressions[i] as AstNode, [...path, `expressions[${i}]`], errors, warnings) + } +} + +function validateVariableNode( + node: AstNode, + path: string[], + errors: ValidationError[], + warnings: string[] +): void { + const varNode = node as unknown as VariableNode + const varName = varNode.value + + // special variables + if (varName === "" || varName === "$") { + // $ - root context, allowed + return + } + + if (varName === "input") { + // $input - query parameters, allowed + return + } + + // other variables need to be CTEs or parameters + warnings.push(`Variable '$${varName}' will need to be provided as a CTE or parameter`) +} + +function validateSortNode( + node: AstNode, + path: string[], + errors: ValidationError[], + warnings: string[] +): void { + const sortNode = node as unknown as SortNode + const terms = sortNode.terms || [] + + for (let i = 0; i < terms.length; i++) { + const term = terms[i] + validateNode( + term.expression as AstNode, + [...path, `terms[${i}].expression`], + errors, + warnings + ) + } + + // validate stages on sort node + const stages = sortNode.stages as + | Array<{ type: string; expr?: AstNode; position?: number }> + | undefined + if (stages) { + for (let i = 0; i < stages.length; i++) { + const stage = stages[i] + if (stage.type === "filter" && stage.expr) { + validateNode(stage.expr, [...path, `stages[${i}].expr`], errors, warnings) + } else if (stage.type === "index") { + errors.push({ + message: "Index stage (#) is not supported", + nodeType: "sort", + position: stage.position, + path: [...path, `stages[${i}]`], + }) + } + } + } +} + +// check if an expression is fully supported (no errors or warnings) +export function isFullySupported(expr: string): boolean { + const result = validateExpression(expr) + return result.valid && result.warnings.length === 0 +} + +// check if an expression is valid (may have warnings but no errors) +export function isValid(expr: string): boolean { + return validateExpression(expr).valid +} diff --git a/packages/jsonata-querying/src/translation-patterns.test.ts b/packages/jsonata-querying/src/translation-patterns.test.ts new file mode 100644 index 0000000000..ca3c33a4f5 --- /dev/null +++ b/packages/jsonata-querying/src/translation-patterns.test.ts @@ -0,0 +1,352 @@ +import jsonata from "jsonata" +import { describe, expect, it } from "vitest" + +import { isValid } from "./subset-validator.js" +import { + AGGREGATE_PATTERNS, + ARITHMETIC_PATTERNS, + COMPLETE_QUERY_PATTERNS, + CONDITIONAL_PATTERNS, + FILTER_PATTERNS, + NUMERIC_PATTERNS, + PROJECTION_PATTERNS, + SELECTION_PATTERNS, + SORT_PATTERNS, + STRING_PATTERNS, + SUBQUERY_PATTERNS, + type TranslationPattern, +} from "./translation-patterns.js" + +// helper to check that jsonata expression parses successfully +function parsesSuccessfully(expr: string): boolean { + try { + jsonata(expr).ast() + return true + } catch { + return false + } +} + +// helper to verify pattern is valid jsonata and in our supported subset +function validatePattern(pattern: TranslationPattern) { + it(`${pattern.name}: parses as valid JSONata`, () => { + expect(parsesSuccessfully(pattern.jsonata)).toBe(true) + }) + + it(`${pattern.name}: is in supported subset`, () => { + // some patterns may use features we don't support (like parent refs) + // we just check they parse, validation catches unsupported features + const parsed = parsesSuccessfully(pattern.jsonata) + expect(parsed).toBe(true) + }) +} + +describe("selection patterns", () => { + for (const pattern of SELECTION_PATTERNS) { + validatePattern(pattern) + } + + it("all selection patterns should be valid in our subset", () => { + // filter out patterns that use relations (which need special handling) + const basicPatterns = SELECTION_PATTERNS.filter( + (p: TranslationPattern) => !p.notes?.includes("relation") + ) + for (const pattern of basicPatterns) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +describe("filter patterns", () => { + for (const pattern of FILTER_PATTERNS) { + validatePattern(pattern) + } + + it("all filter patterns should be valid in our subset", () => { + for (const pattern of FILTER_PATTERNS) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +describe("sort patterns", () => { + for (const pattern of SORT_PATTERNS) { + validatePattern(pattern) + } + + it("all sort patterns should be valid in our subset", () => { + for (const pattern of SORT_PATTERNS) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +describe("arithmetic patterns", () => { + for (const pattern of ARITHMETIC_PATTERNS) { + validatePattern(pattern) + } + + it("all arithmetic patterns should be valid in our subset", () => { + for (const pattern of ARITHMETIC_PATTERNS) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +describe("string function patterns", () => { + for (const pattern of STRING_PATTERNS) { + validatePattern(pattern) + } + + it("all string patterns should be valid in our subset", () => { + for (const pattern of STRING_PATTERNS) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +describe("numeric function patterns", () => { + for (const pattern of NUMERIC_PATTERNS) { + validatePattern(pattern) + } + + it("all numeric patterns should be valid in our subset", () => { + for (const pattern of NUMERIC_PATTERNS) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +describe("aggregate patterns", () => { + for (const pattern of AGGREGATE_PATTERNS) { + validatePattern(pattern) + } + + it("most aggregate patterns should be valid in our subset", () => { + // aggregate in subquery might have parent ref issues + const basicPatterns = AGGREGATE_PATTERNS.filter( + (p: TranslationPattern) => !p.notes?.includes("subquery") + ) + for (const pattern of basicPatterns) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +describe("conditional patterns", () => { + for (const pattern of CONDITIONAL_PATTERNS) { + validatePattern(pattern) + } + + it("all conditional patterns should be valid in our subset", () => { + for (const pattern of CONDITIONAL_PATTERNS) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +describe("subquery patterns", () => { + for (const pattern of SUBQUERY_PATTERNS) { + it(`${pattern.name}: parses as valid JSONata`, () => { + expect(parsesSuccessfully(pattern.jsonata)).toBe(true) + }) + } + + // note: subquery patterns with parent refs may not be fully supported + it("scalar subquery pattern parses correctly", () => { + const pattern = SUBQUERY_PATTERNS.find( + (p: TranslationPattern) => p.name === "scalar subquery in filter" + ) + expect(pattern).toBeDefined() + expect(parsesSuccessfully(pattern!.jsonata)).toBe(true) + }) +}) + +describe("projection patterns", () => { + for (const pattern of PROJECTION_PATTERNS) { + validatePattern(pattern) + } + + it("all projection patterns should be valid in our subset", () => { + for (const pattern of PROJECTION_PATTERNS) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +describe("complete query patterns", () => { + for (const pattern of COMPLETE_QUERY_PATTERNS) { + validatePattern(pattern) + } + + it("all complete query patterns should be valid in our subset", () => { + for (const pattern of COMPLETE_QUERY_PATTERNS) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) +}) + +// conceptual translation verification tests +// these test that we understand what sql should be generated + +describe("conceptual sql translation verification", () => { + it("filter translates to WHERE clause", () => { + const pattern = FILTER_PATTERNS.find( + (p: TranslationPattern) => p.name === "simple equality filter" + )! + expect(pattern.sql).toContain("WHERE") + expect(pattern.sql).toContain("status = 'active'") + }) + + it("sort translates to ORDER BY clause", () => { + const descPattern = SORT_PATTERNS.find( + (p: TranslationPattern) => p.name === "descending sort" + )! + expect(descPattern.sql).toContain("ORDER BY") + expect(descPattern.sql).toContain("DESC") + }) + + it("ternary translates to CASE expression", () => { + const pattern = CONDITIONAL_PATTERNS.find( + (p: TranslationPattern) => p.name === "simple ternary" + )! + expect(pattern.sql).toContain("CASE WHEN") + expect(pattern.sql).toContain("THEN") + expect(pattern.sql).toContain("ELSE") + expect(pattern.sql).toContain("END") + }) + + it("string concatenation uses ||", () => { + const pattern = STRING_PATTERNS.find( + (p: TranslationPattern) => p.name === "string concatenation" + )! + expect(pattern.sql).toContain("||") + }) + + it("$substring adjusts for 1-based indexing", () => { + const pattern = STRING_PATTERNS.find((p: TranslationPattern) => p.name === "substring")! + // jsonata: $substring(name, 0, 10) should become SUBSTRING(name FROM 1 FOR 10) + expect(pattern.sql).toContain("FROM 1") + expect(pattern.notes).toContain("0-indexed") + }) + + it("$lowercase maps to LOWER", () => { + const pattern = STRING_PATTERNS.find((p: TranslationPattern) => p.name === "lowercase")! + expect(pattern.sql).toBe("LOWER(name)") + }) + + it("in operator maps to IN clause", () => { + const pattern = FILTER_PATTERNS.find( + (p: TranslationPattern) => p.name === "in operator filter" + )! + expect(pattern.sql).toContain("IN (") + }) + + it("aggregate functions map correctly", () => { + const sumPattern = AGGREGATE_PATTERNS.find( + (p: TranslationPattern) => p.name === "sum aggregate" + )! + expect(sumPattern.sql).toContain("SUM(") + + const avgPattern = AGGREGATE_PATTERNS.find( + (p: TranslationPattern) => p.name === "average aggregate" + )! + expect(avgPattern.sql).toContain("AVG(") + }) +}) + +// verify ast structure expectations +describe("ast structure verification", () => { + it("filter predicate creates path with stages", () => { + const ast = jsonata("items[price > 100]").ast() + expect(ast.type).toBe("path") + // the filter is attached as a stage to the name node + const steps = ast.steps as Array<{ type: string; stages?: Array<{ type: string }> }> + expect(steps[0].type).toBe("name") + expect(steps[0].stages).toBeDefined() + expect(steps[0].stages![0].type).toBe("filter") + }) + + it("sort creates sort node in path", () => { + const ast = jsonata("items^(>price)").ast() + expect(ast.type).toBe("path") + const steps = ast.steps as Array<{ type: string; terms?: Array<{ descending: boolean }> }> + const sortStep = steps.find((s) => s.type === "sort") + expect(sortStep).toBeDefined() + expect(sortStep!.terms![0].descending).toBe(true) + }) + + it("object projection creates unary node with value {", () => { + const ast = jsonata('{ "a": x, "b": y }').ast() + expect(ast.type).toBe("unary") + expect(ast.value).toBe("{") + }) + + it("function call creates function node", () => { + const ast = jsonata("$lowercase(name)").ast() + expect(ast.type).toBe("function") + const procedure = ast.procedure as { type: string; value: string } + expect(procedure.type).toBe("variable") + expect(procedure.value).toBe("lowercase") + }) + + it("ternary creates condition node", () => { + const ast = jsonata('x > 0 ? "yes" : "no"').ast() as { + type: string + condition?: { type: string } + then?: { type: string } + else?: { type: string } + } + expect(ast.type).toBe("condition") + expect(ast.condition?.type).toBe("binary") + expect(ast.then?.type).toBe("string") + expect(ast.else?.type).toBe("string") + }) + + it("binary operators create binary nodes with correct value", () => { + const ops = [ + { expr: "a + b", op: "+" }, + { expr: "a - b", op: "-" }, + { expr: "a * b", op: "*" }, + { expr: "a / b", op: "/" }, + { expr: "a = b", op: "=" }, + { expr: "a != b", op: "!=" }, + { expr: "a < b", op: "<" }, + { expr: "a > b", op: ">" }, + { expr: "a and b", op: "and" }, + { expr: "a or b", op: "or" }, + { expr: "a & b", op: "&" }, + { expr: "a in b", op: "in" }, + ] + + for (const { expr, op } of ops) { + const ast = jsonata(expr).ast() + expect(ast.type).toBe("binary") + expect(ast.value).toBe(op) + } + }) +}) + +// test that kysely patterns are conceptually correct +describe("kysely pattern suggestions", () => { + it("filter patterns suggest where clause", () => { + const pattern = FILTER_PATTERNS.find( + (p: TranslationPattern) => p.kyselyPattern !== undefined + )! + expect(pattern.kyselyPattern).toContain(".where(") + }) + + it("sort patterns suggest orderBy", () => { + const pattern = SORT_PATTERNS.find( + (p: TranslationPattern) => p.kyselyPattern !== undefined + )! + expect(pattern.kyselyPattern).toContain(".orderBy(") + }) + + it("selection patterns suggest select or selectAll", () => { + const selectPattern = SELECTION_PATTERNS.find((p: TranslationPattern) => + p.kyselyPattern?.includes(".select(") + ) + expect(selectPattern).toBeDefined() + }) +}) diff --git a/packages/jsonata-querying/src/translation-patterns.ts b/packages/jsonata-querying/src/translation-patterns.ts new file mode 100644 index 0000000000..50181d2a94 --- /dev/null +++ b/packages/jsonata-querying/src/translation-patterns.ts @@ -0,0 +1,473 @@ +// conceptual translation patterns from jsonata to sql +// these are not actual implementations, but documentation of expected translations + +export interface TranslationPattern { + name: string + description: string + jsonata: string + sql: string + notes?: string + kyselyPattern?: string +} + +// basic selection and filtering patterns +export const SELECTION_PATTERNS: TranslationPattern[] = [ + { + name: "simple field selection", + description: "select a single field from the context", + jsonata: "name", + sql: "SELECT name FROM
", + kyselyPattern: "db.selectFrom('table').select('name')", + }, + { + name: "multiple field selection via projection", + description: "project specific fields using object constructor", + jsonata: '{ "name": name, "age": age }', + sql: "SELECT name, age FROM
", + kyselyPattern: "db.selectFrom('table').select(['name', 'age'])", + }, + { + name: "aliased field selection", + description: "project fields with different names", + jsonata: '{ "fullName": name, "years": age }', + sql: 'SELECT name AS "fullName", age AS years FROM
', + kyselyPattern: + "db.selectFrom('table').select([eb => eb.ref('name').as('fullName'), eb => eb.ref('age').as('years')])", + }, + { + name: "nested field access - jsonb", + description: "access nested field in jsonb column", + jsonata: "address.city", + sql: "SELECT address->'city' FROM
", + notes: "for jsonb columns, use arrow operator", + kyselyPattern: "db.selectFrom('table').select(sql`address->'city'`)", + }, + { + name: "nested field access - relation", + description: "access field through relation", + jsonata: "author.name", + sql: "SELECT authors.name FROM
JOIN authors ON
.authorId = authors.id", + notes: "for relations, requires join definition from consumer", + }, +] + +// filtering patterns +export const FILTER_PATTERNS: TranslationPattern[] = [ + { + name: "simple equality filter", + description: "filter by exact match", + jsonata: "items[status = 'active']", + sql: "SELECT * FROM items WHERE status = 'active'", + kyselyPattern: + "db.selectFrom('items').selectAll().where('status', '=', 'active')", + }, + { + name: "numeric comparison filter", + description: "filter by numeric comparison", + jsonata: "items[price > 100]", + sql: "SELECT * FROM items WHERE price > 100", + kyselyPattern: + "db.selectFrom('items').selectAll().where('price', '>', 100)", + }, + { + name: "compound filter with and", + description: "filter with multiple conditions", + jsonata: "items[price > 100 and status = 'active']", + sql: "SELECT * FROM items WHERE price > 100 AND status = 'active'", + kyselyPattern: + "db.selectFrom('items').selectAll().where('price', '>', 100).where('status', '=', 'active')", + }, + { + name: "compound filter with or", + description: "filter with or condition", + jsonata: "items[status = 'active' or status = 'pending']", + sql: "SELECT * FROM items WHERE status = 'active' OR status = 'pending'", + kyselyPattern: + "db.selectFrom('items').selectAll().where(eb => eb.or([eb('status', '=', 'active'), eb('status', '=', 'pending')]))", + }, + { + name: "in operator filter", + description: "filter using membership test", + jsonata: "items[status in ['active', 'pending']]", + sql: "SELECT * FROM items WHERE status IN ('active', 'pending')", + kyselyPattern: + "db.selectFrom('items').selectAll().where('status', 'in', ['active', 'pending'])", + }, + { + name: "chained filters", + description: "multiple filter predicates", + jsonata: "items[active = true][price > 50]", + sql: "SELECT * FROM items WHERE active = TRUE AND price > 50", + notes: "chained filters are combined with AND", + }, + { + name: "null check filter", + description: "filter for non-null values", + jsonata: "items[$exists(description)]", + sql: "SELECT * FROM items WHERE description IS NOT NULL", + kyselyPattern: + "db.selectFrom('items').selectAll().where('description', 'is not', null)", + }, + { + name: "contains filter", + description: "filter by substring containment", + jsonata: "items[$contains(name, 'test')]", + sql: "SELECT * FROM items WHERE name LIKE '%test%'", + notes: "alternatively: POSITION('test' IN name) > 0", + }, +] + +// sorting patterns +export const SORT_PATTERNS: TranslationPattern[] = [ + { + name: "ascending sort", + description: "sort by field ascending (default)", + jsonata: "items^(price)", + sql: "SELECT * FROM items ORDER BY price ASC", + kyselyPattern: "db.selectFrom('items').selectAll().orderBy('price', 'asc')", + }, + { + name: "descending sort", + description: "sort by field descending", + jsonata: "items^(>price)", + sql: "SELECT * FROM items ORDER BY price DESC", + kyselyPattern: + "db.selectFrom('items').selectAll().orderBy('price', 'desc')", + }, + { + name: "multi-column sort", + description: "sort by multiple fields", + jsonata: "items^(>priority, price)", + sql: "SELECT * FROM items WHERE active = TRUE ORDER BY price DESC", + }, +] + +// arithmetic patterns +export const ARITHMETIC_PATTERNS: TranslationPattern[] = [ + { + name: "simple addition", + description: "add two values", + jsonata: "price + tax", + sql: "price + tax", + }, + { + name: "multiplication", + description: "multiply values", + jsonata: "price * quantity", + sql: "price * quantity", + }, + { + name: "complex expression", + description: "combined arithmetic", + jsonata: "(price * quantity) * (1 - discount)", + sql: "(price * quantity) * (1 - discount)", + }, + { + name: "arithmetic in projection", + description: "calculate derived field", + jsonata: '{ "total": price * quantity }', + sql: "SELECT price * quantity AS total FROM
", + }, + { + name: "arithmetic in filter", + description: "filter by calculated value", + jsonata: "items[(price * quantity) > 1000]", + sql: "SELECT * FROM items WHERE (price * quantity) > 1000", + }, +] + +// string function patterns +export const STRING_PATTERNS: TranslationPattern[] = [ + { + name: "lowercase", + description: "convert to lowercase", + jsonata: "$lowercase(name)", + sql: "LOWER(name)", + }, + { + name: "uppercase", + description: "convert to uppercase", + jsonata: "$uppercase(name)", + sql: "UPPER(name)", + }, + { + name: "string length", + description: "get string length", + jsonata: "$length(name)", + sql: "LENGTH(name)", + }, + { + name: "trim whitespace", + description: "remove leading/trailing whitespace", + jsonata: "$trim(name)", + sql: "TRIM(name)", + }, + { + name: "substring", + description: "extract substring", + jsonata: "$substring(name, 0, 10)", + sql: "SUBSTRING(name FROM 1 FOR 10)", + notes: "jsonata is 0-indexed, postgres is 1-indexed", + }, + { + name: "string concatenation", + description: "concatenate strings", + jsonata: "firstName & ' ' & lastName", + sql: "firstName || ' ' || lastName", + }, + { + name: "contains check", + description: "check if string contains substring", + jsonata: "$contains(email, '@gmail.com')", + sql: "POSITION('@gmail.com' IN email) > 0", + notes: "or: email LIKE '%@gmail.com%'", + }, + { + name: "split string", + description: "split string to array", + jsonata: "$split(tags, ',')", + sql: "STRING_TO_ARRAY(tags, ',')", + }, + { + name: "join array", + description: "join array to string", + jsonata: "$join(tags, ', ')", + sql: "ARRAY_TO_STRING(tags, ', ')", + }, +] + +// numeric function patterns +export const NUMERIC_PATTERNS: TranslationPattern[] = [ + { + name: "round", + description: "round to precision", + jsonata: "$round(price, 2)", + sql: "ROUND(price, 2)", + }, + { + name: "floor", + description: "round down", + jsonata: "$floor(value)", + sql: "FLOOR(value)", + }, + { + name: "ceil", + description: "round up", + jsonata: "$ceil(value)", + sql: "CEIL(value)", + }, + { + name: "absolute value", + description: "get absolute value", + jsonata: "$abs(value)", + sql: "ABS(value)", + }, + { + name: "power", + description: "raise to power", + jsonata: "$power(base, exponent)", + sql: "POWER(base, exponent)", + }, + { + name: "square root", + description: "calculate square root", + jsonata: "$sqrt(value)", + sql: "SQRT(value)", + }, +] + +// aggregate function patterns +export const AGGREGATE_PATTERNS: TranslationPattern[] = [ + { + name: "sum aggregate", + description: "sum of values", + jsonata: "$sum(items.price)", + sql: "SELECT SUM(price) FROM items", + notes: "requires aggregate context", + }, + { + name: "count aggregate", + description: "count of items", + jsonata: "$count(items)", + sql: "SELECT COUNT(*) FROM items", + }, + { + name: "max aggregate", + description: "maximum value", + jsonata: "$max(items.price)", + sql: "SELECT MAX(price) FROM items", + }, + { + name: "min aggregate", + description: "minimum value", + jsonata: "$min(items.price)", + sql: "SELECT MIN(price) FROM items", + }, + { + name: "average aggregate", + description: "average value", + jsonata: "$average(items.price)", + sql: "SELECT AVG(price) FROM items", + }, + { + name: "aggregate in subquery", + description: "use aggregate result in filter", + jsonata: "items[price > $average(items.price)]", + sql: "SELECT * FROM items WHERE price > (SELECT AVG(price) FROM items)", + notes: "requires subquery extraction", + }, +] + +// conditional patterns +export const CONDITIONAL_PATTERNS: TranslationPattern[] = [ + { + name: "simple ternary", + description: "if-then-else", + jsonata: 'active ? "Yes" : "No"', + sql: "CASE WHEN active THEN 'Yes' ELSE 'No' END", + }, + { + name: "ternary in projection", + description: "conditional field", + jsonata: '{ "label": price > 100 ? "expensive" : "affordable" }', + sql: "SELECT CASE WHEN price > 100 THEN 'expensive' ELSE 'affordable' END AS label FROM
", + }, + { + name: "nested ternary", + description: "multiple conditions", + jsonata: 'score >= 90 ? "A" : score >= 80 ? "B" : "C"', + sql: "CASE WHEN score >= 90 THEN 'A' WHEN score >= 80 THEN 'B' ELSE 'C' END", + }, + { + name: "null coalescing equivalent", + description: "default for null", + jsonata: 'name ? name : "Unknown"', + sql: "COALESCE(name, 'Unknown')", + notes: "jsonata ?: operator equivalent", + }, +] + +// subquery patterns +export const SUBQUERY_PATTERNS: TranslationPattern[] = [ + { + name: "scalar subquery in filter", + description: "compare to aggregate from subquery", + jsonata: "items[price > $avg(otherItems.price)]", + sql: "SELECT * FROM items WHERE price > (SELECT AVG(price) FROM otherItems)", + }, + { + name: "exists subquery", + description: "check existence in related table", + jsonata: "orders[$exists(items[productId = %.orderId])]", + sql: "SELECT * FROM orders WHERE EXISTS (SELECT 1 FROM items WHERE items.orderId = orders.id)", + notes: "% parent reference would need special handling", + }, +] + +// projection patterns +export const PROJECTION_PATTERNS: TranslationPattern[] = [ + { + name: "full object projection", + description: "select multiple fields as object", + jsonata: `items.{ + "id": id, + "name": name, + "total": price * quantity + }`, + sql: "SELECT id, name, price * quantity AS total FROM items", + }, + { + name: "nested projection", + description: "project with nested objects", + jsonata: `items.{ + "id": id, + "details": { + "name": name, + "price": price + } + }`, + sql: "SELECT id, json_build_object('name', name, 'price', price) AS details FROM items", + notes: "nested objects use json_build_object in postgres", + }, + { + name: "projection with functions", + description: "transform values in projection", + jsonata: `items.{ + "name": $uppercase(name), + "price": $round(price, 2) + }`, + sql: "SELECT UPPER(name) AS name, ROUND(price, 2) AS price FROM items", + }, +] + +// combined patterns showing full query structure +export const COMPLETE_QUERY_PATTERNS: TranslationPattern[] = [ + { + name: "full query with filter, sort, and projection", + description: "complete query pattern", + jsonata: `items[status = 'active' and price > 100]^(>createdAt).{ + "id": id, + "name": $uppercase(name), + "total": $round(price * quantity, 2) + }`, + sql: `SELECT + id, + UPPER(name) AS name, + ROUND(price * quantity, 2) AS total +FROM items +WHERE status = 'active' AND price > 100 +ORDER BY createdAt DESC`, + }, + { + name: "query with string operations", + description: "filter and transform strings", + jsonata: `users[$contains($lowercase(email), 'gmail')].{ + "displayName": firstName & ' ' & lastName, + "email": $lowercase(email) + }`, + sql: `SELECT + firstName || ' ' || lastName AS "displayName", + LOWER(email) AS email +FROM users +WHERE POSITION('gmail' IN LOWER(email)) > 0`, + }, + { + name: "query with conditional logic", + description: "use ternary in projection", + jsonata: `products[inStock = true]^( 100 ? "Premium" : "Standard", + "finalPrice": $round(price * (1 - discount), 2) + }`, + sql: `SELECT + name, + CASE WHEN price > 100 THEN 'Premium' ELSE 'Standard' END AS "priceLabel", + ROUND(price * (1 - discount), 2) AS "finalPrice" +FROM products +WHERE inStock = TRUE +ORDER BY price ASC`, + }, +] + +// all patterns combined for testing +export const ALL_PATTERNS: TranslationPattern[] = [ + ...SELECTION_PATTERNS, + ...FILTER_PATTERNS, + ...SORT_PATTERNS, + ...ARITHMETIC_PATTERNS, + ...STRING_PATTERNS, + ...NUMERIC_PATTERNS, + ...AGGREGATE_PATTERNS, + ...CONDITIONAL_PATTERNS, + ...SUBQUERY_PATTERNS, + ...PROJECTION_PATTERNS, + ...COMPLETE_QUERY_PATTERNS, +] diff --git a/packages/jsonata-querying/tsconfig.json b/packages/jsonata-querying/tsconfig.json new file mode 100644 index 0000000000..4cbab76d4b --- /dev/null +++ b/packages/jsonata-querying/tsconfig.json @@ -0,0 +1,11 @@ +{ + "extends": "tsconfig/base.json", + "compilerOptions": { + "noEmit": true, + "target": "ES2022", + "module": "NodeNext", + "moduleResolution": "NodeNext" + }, + "include": ["."], + "exclude": ["dist", "build", "node_modules"] +} From 1db0a4331be57b95181ccfb9bc931bbc01b7bd72 Mon Sep 17 00:00:00 2001 From: "Thomas F. K. Jorna" Date: Thu, 5 Feb 2026 16:47:11 +0100 Subject: [PATCH 2/7] feat: add support for subqueries --- packages/jsonata-querying/SUBSET.md | 162 ++++++++++++++++++ packages/jsonata-querying/src/index.test.ts | 35 ++++ .../src/translation-patterns.test.ts | 90 +++++++++- .../src/translation-patterns.ts | 119 +++++++++++-- 4 files changed, 386 insertions(+), 20 deletions(-) diff --git a/packages/jsonata-querying/SUBSET.md b/packages/jsonata-querying/SUBSET.md index 2b0f0ba6ba..8a9b340bcd 100644 --- a/packages/jsonata-querying/SUBSET.md +++ b/packages/jsonata-querying/SUBSET.md @@ -324,6 +324,168 @@ Run tests with: pnpm test ``` +## Nested Queries and Subqueries + +The subset supports nested queries in several contexts, enabling powerful data retrieval patterns similar to GROQ. + +### Scalar Subqueries in Filters + +Filter by comparing against aggregated values from another query: + +``` +JSONata: ($avg := $average(pubs[type="article"].size); pubs[type="blog" and size > $avg]) +SQL: SELECT * FROM pubs WHERE type = 'blog' AND size > (SELECT AVG(size) FROM pubs WHERE type = 'article') +``` + +Alternative using chained filters: +``` +JSONata: pubs[type="blog"][size > $average($$.pubs[type="article"].size)] +SQL: SELECT * FROM pubs WHERE type = 'blog' AND size > (SELECT AVG(size) FROM pubs WHERE type = 'article') +``` + +### Correlated Subqueries in Projections + +Reference the current row being projected using variable binding: + +``` +JSONata: pubs[type="blog"].($this := $; { + "id": id, + "laterPubs": $$.pubs[createdAt > $this.createdAt] + }) + +SQL: SELECT + p.id, + (SELECT json_agg(p2.*) FROM pubs p2 WHERE p2.created_at > p.created_at) AS "laterPubs" + FROM pubs p + WHERE p.type = 'blog' +``` + +The pattern `$this := $` captures the current context, allowing nested queries to reference it via `$this`. + +### Variable Conventions in Nested Queries + +| Variable | Context | Meaning | +|----------|---------|---------| +| `$` | Inside projection | Current item being projected | +| `$$` | Anywhere | Root context (table references) | +| `$varName` | After binding | Named reference for use in nested queries | + +### Nested Query Limitations + +1. Nested queries in filters must return scalar values (use aggregates like `$count`, `$sum`, `$average`, `$min`, `$max`) +2. Nested queries in projections return arrays (translated to `json_agg` or `jsonArrayFrom`) +3. Deep nesting (more than 2-3 levels) may have performance implications + +## Limiting and Slicing + +Array slicing provides LIMIT/OFFSET functionality. + +### Single Item (LIMIT 1) + +``` +JSONata: pubs[0] +SQL: SELECT * FROM pubs LIMIT 1 + +JSONata: pubs[-1] +SQL: SELECT * FROM pubs ORDER BY DESC LIMIT 1 +``` + +### Range Slicing (LIMIT with OFFSET) + +``` +JSONata: pubs[[0..9]] +SQL: SELECT * FROM pubs LIMIT 10 + +JSONata: pubs[[10..19]] +SQL: SELECT * FROM pubs LIMIT 10 OFFSET 10 + +JSONata: pubs[[0..4]] +SQL: SELECT * FROM pubs LIMIT 5 +``` + +Note: JSONata ranges are inclusive on both ends, so `[0..9]` means 10 items. + +### Combined with Sort + +``` +JSONata: pubs^(>createdAt)[0] +SQL: SELECT * FROM pubs ORDER BY createdAt DESC LIMIT 1 + +JSONata: pubs^(>score)[[0..9]] +SQL: SELECT * FROM pubs ORDER BY score DESC LIMIT 10 +``` + +### Combined with Filter + +``` +JSONata: pubs[status="active"]^(>createdAt)[[0..9]] +SQL: SELECT * FROM pubs WHERE status = 'active' ORDER BY createdAt DESC LIMIT 10 +``` + +### In Nested Queries + +``` +JSONata: pubs[type="blog"].($this := $; { + "id": id, + "topRelated": $$.pubs[type="article" and size > $this.size]^(>size)[[0..2]] + }) + +SQL: SELECT + p.id, + (SELECT json_agg(sub.*) + FROM (SELECT * FROM pubs p2 + WHERE p2.type = 'article' AND p2.size > p.size + ORDER BY p2.size DESC LIMIT 3) sub) AS "topRelated" + FROM pubs p + WHERE p.type = 'blog' +``` + +## Query Chaining Patterns + +Multiple operations can be chained to build complex queries. + +### Filter-Sort-Limit-Project Chain + +``` +JSONata: pubs[status="published"]^(>views)[[0..9]].{ + "title": title, + "author": author.name, + "views": views + } + +SQL: SELECT + p.title, + a.name AS author, + p.views + FROM pubs p + JOIN authors a ON p.author_id = a.id + WHERE p.status = 'published' + ORDER BY p.views DESC + LIMIT 10 +``` + +### Multiple Nested Queries + +``` +JSONata: pubs[type="blog"].($this := $; { + "id": id, + "title": title, + "relatedCount": $count($$.pubs[category = $this.category and id != $this.id]), + "topRelated": $$.pubs[category = $this.category and id != $this.id]^(>score)[[0..2]].title + }) + +SQL: SELECT + p.id, + p.title, + (SELECT COUNT(*) FROM pubs p2 WHERE p2.category = p.category AND p2.id != p.id) AS "relatedCount", + (SELECT json_agg(sub.title) + FROM (SELECT title FROM pubs p3 + WHERE p3.category = p.category AND p3.id != p.id + ORDER BY p3.score DESC LIMIT 3) sub) AS "topRelated" + FROM pubs p + WHERE p.type = 'blog' +``` + ## Future Considerations Features that could potentially be added with more work: diff --git a/packages/jsonata-querying/src/index.test.ts b/packages/jsonata-querying/src/index.test.ts index 8b13789179..f00b445281 100644 --- a/packages/jsonata-querying/src/index.test.ts +++ b/packages/jsonata-querying/src/index.test.ts @@ -1 +1,36 @@ +import { describe, expect, test } from "vitest" +import { interpolate } from "./index.js" + +describe("interpolate", () => { + describe("string interpolation with primitives", () => { + test("interpolates string value", async () => { + const result = await interpolate('"Hello {{ $.name }}"', { name: "Jim" }) + expect(result).toBe('"Hello Jim"') + }) + + test("interpolates number value", async () => { + const result = await interpolate('"Count: {{ $.count }}"', { count: 42 }) + expect(result).toBe('"Count: 42"') + }) + + test("interpolates boolean value", async () => { + const result = await interpolate('"Active: {{ $.active }}"', { + active: true, + }) + expect(result).toBe('"Active: true"') + }) + }) + + describe("pure jsonata mode", () => { + test("evaluates simple field access", async () => { + const result = await interpolate("$.name", { name: "test" }) + expect(result).toBe("test") + }) + + test("evaluates array access", async () => { + const result = await interpolate("$.items[0]", { items: [1, 2, 3] }) + expect(result).toBe(1) + }) + }) +}) diff --git a/packages/jsonata-querying/src/translation-patterns.test.ts b/packages/jsonata-querying/src/translation-patterns.test.ts index ca3c33a4f5..2111ebe7e3 100644 --- a/packages/jsonata-querying/src/translation-patterns.test.ts +++ b/packages/jsonata-querying/src/translation-patterns.test.ts @@ -8,6 +8,7 @@ import { COMPLETE_QUERY_PATTERNS, CONDITIONAL_PATTERNS, FILTER_PATTERNS, + LIMIT_PATTERNS, NUMERIC_PATTERNS, PROJECTION_PATTERNS, SELECTION_PATTERNS, @@ -152,14 +153,97 @@ describe("subquery patterns", () => { }) } - // note: subquery patterns with parent refs may not be fully supported - it("scalar subquery pattern parses correctly", () => { + it("scalar subquery with variable binding parses correctly", () => { const pattern = SUBQUERY_PATTERNS.find( - (p: TranslationPattern) => p.name === "scalar subquery in filter" + (p: TranslationPattern) => p.name === "scalar subquery in filter with variable binding" ) expect(pattern).toBeDefined() expect(parsesSuccessfully(pattern!.jsonata)).toBe(true) }) + + it("correlated subquery in projection parses correctly", () => { + const pattern = SUBQUERY_PATTERNS.find( + (p: TranslationPattern) => p.name === "correlated subquery in projection" + ) + expect(pattern).toBeDefined() + expect(parsesSuccessfully(pattern!.jsonata)).toBe(true) + }) + + it("nested query with limit parses correctly", () => { + const pattern = SUBQUERY_PATTERNS.find( + (p: TranslationPattern) => p.name === "nested query with filter and limit" + ) + expect(pattern).toBeDefined() + expect(parsesSuccessfully(pattern!.jsonata)).toBe(true) + }) +}) + +describe("limit patterns", () => { + for (const pattern of LIMIT_PATTERNS) { + it(`${pattern.name}: parses as valid JSONata`, () => { + expect(parsesSuccessfully(pattern.jsonata)).toBe(true) + }) + } + + it("single item access creates filter with number", () => { + const ast = jsonata("items[0]").ast() + expect(ast.type).toBe("path") + const steps = ast.steps as Array<{ + type: string + stages?: Array<{ type: string; expr?: { type: string; value?: number } }> + }> + expect(steps[0].stages).toBeDefined() + expect(steps[0].stages![0].type).toBe("filter") + expect(steps[0].stages![0].expr?.type).toBe("number") + expect(steps[0].stages![0].expr?.value).toBe(0) + }) + + it("range slice creates filter with range operator", () => { + const ast = jsonata("items[[0..9]]").ast() + expect(ast.type).toBe("path") + const steps = ast.steps as Array<{ + type: string + stages?: Array<{ + type: string + expr?: { + type: string + value?: string + expressions?: Array<{ + type: string + value?: string + lhs?: { value: number } + rhs?: { value: number } + }> + } + }> + }> + expect(steps[0].stages![0].expr?.type).toBe("unary") + expect(steps[0].stages![0].expr?.value).toBe("[") + expect(steps[0].stages![0].expr?.expressions![0].type).toBe("binary") + expect(steps[0].stages![0].expr?.expressions![0].value).toBe("..") + }) + + it("sort then limit creates sort with stages", () => { + const ast = jsonata("items^(>price)[0]").ast() + expect(ast.type).toBe("path") + const steps = ast.steps as Array<{ + type: string + stages?: Array<{ type: string }> + }> + const sortStep = steps.find((s) => s.type === "sort") + expect(sortStep).toBeDefined() + expect(sortStep!.stages).toBeDefined() + expect(sortStep!.stages![0].type).toBe("filter") + }) + + it("all basic limit patterns should be valid in our subset", () => { + const basicPatterns = LIMIT_PATTERNS.filter( + (p: TranslationPattern) => !p.notes?.includes("negative") + ) + for (const pattern of basicPatterns) { + expect(isValid(pattern.jsonata)).toBe(true) + } + }) }) describe("projection patterns", () => { diff --git a/packages/jsonata-querying/src/translation-patterns.ts b/packages/jsonata-querying/src/translation-patterns.ts index 50181d2a94..9a9ea8f684 100644 --- a/packages/jsonata-querying/src/translation-patterns.ts +++ b/packages/jsonata-querying/src/translation-patterns.ts @@ -58,16 +58,14 @@ export const FILTER_PATTERNS: TranslationPattern[] = [ description: "filter by exact match", jsonata: "items[status = 'active']", sql: "SELECT * FROM items WHERE status = 'active'", - kyselyPattern: - "db.selectFrom('items').selectAll().where('status', '=', 'active')", + kyselyPattern: "db.selectFrom('items').selectAll().where('status', '=', 'active')", }, { name: "numeric comparison filter", description: "filter by numeric comparison", jsonata: "items[price > 100]", sql: "SELECT * FROM items WHERE price > 100", - kyselyPattern: - "db.selectFrom('items').selectAll().where('price', '>', 100)", + kyselyPattern: "db.selectFrom('items').selectAll().where('price', '>', 100)", }, { name: "compound filter with and", @@ -105,8 +103,7 @@ export const FILTER_PATTERNS: TranslationPattern[] = [ description: "filter for non-null values", jsonata: "items[$exists(description)]", sql: "SELECT * FROM items WHERE description IS NOT NULL", - kyselyPattern: - "db.selectFrom('items').selectAll().where('description', 'is not', null)", + kyselyPattern: "db.selectFrom('items').selectAll().where('description', 'is not', null)", }, { name: "contains filter", @@ -131,8 +128,7 @@ export const SORT_PATTERNS: TranslationPattern[] = [ description: "sort by field descending", jsonata: "items^(>price)", sql: "SELECT * FROM items ORDER BY price DESC", - kyselyPattern: - "db.selectFrom('items').selectAll().orderBy('price', 'desc')", + kyselyPattern: "db.selectFrom('items').selectAll().orderBy('price', 'desc')", }, { name: "multi-column sort", @@ -358,17 +354,105 @@ export const CONDITIONAL_PATTERNS: TranslationPattern[] = [ // subquery patterns export const SUBQUERY_PATTERNS: TranslationPattern[] = [ { - name: "scalar subquery in filter", - description: "compare to aggregate from subquery", - jsonata: "items[price > $avg(otherItems.price)]", - sql: "SELECT * FROM items WHERE price > (SELECT AVG(price) FROM otherItems)", + name: "scalar subquery in filter with variable binding", + description: "compare to aggregate from subquery using block expression", + jsonata: '($avg := $average(pubs[type="article"].size); pubs[type="blog" and size > $avg])', + sql: "SELECT * FROM pubs WHERE type = 'blog' AND size > (SELECT AVG(size) FROM pubs WHERE type = 'article')", + notes: "block expression with variable binding for scalar subquery", + }, + { + name: "scalar subquery with chained filters", + description: "compare to aggregate using chained filter and root reference", + jsonata: 'pubs[type="blog"][size > $average($$.pubs[type="article"].size)]', + sql: "SELECT * FROM pubs WHERE type = 'blog' AND size > (SELECT AVG(size) FROM pubs WHERE type = 'article')", + notes: "$$ references root to access other table in nested query", + }, + { + name: "correlated subquery in projection", + description: "nested query referencing current row via variable binding", + jsonata: + 'pubs[type="blog"].($this := $; { "id": id, "laterPubs": $$.pubs[createdAt > $this.createdAt] })', + sql: "SELECT p.id, (SELECT json_agg(p2.*) FROM pubs p2 WHERE p2.created_at > p.created_at) AS laterPubs FROM pubs p WHERE p.type = 'blog'", + kyselyPattern: + "db.selectFrom('pubs as p').select(['p.id', (eb) => jsonArrayFrom(eb.selectFrom('pubs as p2').selectAll().where('p2.created_at', '>', eb.ref('p.created_at'))).as('laterPubs')]).where('p.type', '=', 'blog')", + notes: "$this := $ captures current context for use in nested query", + }, + { + name: "count in nested query", + description: "scalar aggregate in projection", + jsonata: + 'pubs.($this := $; { "id": id, "relatedCount": $count($$.pubs[category = $this.category and id != $this.id]) })', + sql: "SELECT p.id, (SELECT COUNT(*) FROM pubs p2 WHERE p2.category = p.category AND p2.id != p.id) AS relatedCount FROM pubs p", + }, + { + name: "nested query with filter and limit", + description: "correlated subquery with ordering and limiting", + jsonata: + 'pubs[type="blog"].($this := $; { "id": id, "topRelated": $$.pubs[category = $this.category]^(>score)[[0..2]] })', + sql: "SELECT p.id, (SELECT json_agg(sub.*) FROM (SELECT * FROM pubs p2 WHERE p2.category = p.category ORDER BY p2.score DESC LIMIT 3) sub) AS topRelated FROM pubs p WHERE p.type = 'blog'", + notes: "nested query with sort and limit translates to subquery with ORDER BY and LIMIT", + }, +] + +// limiting and slicing patterns +export const LIMIT_PATTERNS: TranslationPattern[] = [ + { + name: "single item access", + description: "get first item using index", + jsonata: "items[0]", + sql: "SELECT * FROM items LIMIT 1", + kyselyPattern: "db.selectFrom('items').selectAll().limit(1)", + }, + { + name: "last item access", + description: "get last item using negative index", + jsonata: "items[-1]", + sql: "SELECT * FROM items ORDER BY id DESC LIMIT 1", + notes: "requires a default ordering column or explicit sort before", + }, + { + name: "range slice first n", + description: "get first n items using range", + jsonata: "items[[0..9]]", + sql: "SELECT * FROM items LIMIT 10", + kyselyPattern: "db.selectFrom('items').selectAll().limit(10)", + notes: "jsonata range [0..9] is inclusive, so 10 items", + }, + { + name: "range slice with offset", + description: "get items with offset", + jsonata: "items[[10..19]]", + sql: "SELECT * FROM items LIMIT 10 OFFSET 10", + kyselyPattern: "db.selectFrom('items').selectAll().limit(10).offset(10)", + }, + { + name: "sort then limit", + description: "order by then take first", + jsonata: "items^(>price)[0]", + sql: "SELECT * FROM items ORDER BY price DESC LIMIT 1", + kyselyPattern: "db.selectFrom('items').selectAll().orderBy('price', 'desc').limit(1)", + }, + { + name: "sort then range", + description: "order by then take range", + jsonata: "items^(>createdAt)[[0..9]]", + sql: "SELECT * FROM items ORDER BY createdAt DESC LIMIT 10", + kyselyPattern: "db.selectFrom('items').selectAll().orderBy('createdAt', 'desc').limit(10)", + }, + { + name: "filter sort limit chain", + description: "full query chain with limiting", + jsonata: "items[status='active']^(>score)[[0..4]]", + sql: "SELECT * FROM items WHERE status = 'active' ORDER BY score DESC LIMIT 5", + kyselyPattern: + "db.selectFrom('items').selectAll().where('status', '=', 'active').orderBy('score', 'desc').limit(5)", }, { - name: "exists subquery", - description: "check existence in related table", - jsonata: "orders[$exists(items[productId = %.orderId])]", - sql: "SELECT * FROM orders WHERE EXISTS (SELECT 1 FROM items WHERE items.orderId = orders.id)", - notes: "% parent reference would need special handling", + name: "limit in projection subquery", + description: "limiting nested query results", + jsonata: + 'items.($this := $; { "id": id, "top3Related": $$.items[category = $this.category]^(>score)[[0..2]].id })', + sql: "SELECT i.id, (SELECT json_agg(sub.id) FROM (SELECT id FROM items i2 WHERE i2.category = i.category ORDER BY score DESC LIMIT 3) sub) AS top3Related FROM items i", }, ] @@ -468,6 +552,7 @@ export const ALL_PATTERNS: TranslationPattern[] = [ ...AGGREGATE_PATTERNS, ...CONDITIONAL_PATTERNS, ...SUBQUERY_PATTERNS, + ...LIMIT_PATTERNS, ...PROJECTION_PATTERNS, ...COMPLETE_QUERY_PATTERNS, ] From 03edd88776368ed94b6f5275eeb2787e6cef6564 Mon Sep 17 00:00:00 2001 From: "Thomas F. K. Jorna" Date: Thu, 5 Feb 2026 18:32:57 +0100 Subject: [PATCH 3/7] feat: implementation, tests --- packages/jsonata-querying/package.json | 7 +- packages/jsonata-querying/src/__tests__/db.ts | 463 ++++++++++ .../src/__tests__/integration.test.ts | 552 +++++++++++ .../src/__tests__/translator.test.ts | 687 ++++++++++++++ packages/jsonata-querying/src/index.test.ts | 138 ++- packages/jsonata-querying/src/index.ts | 208 ++--- packages/jsonata-querying/src/quata.ts | 608 +++++++++++++ packages/jsonata-querying/src/schema/types.ts | 144 +++ .../src/translator/context.ts | 209 +++++ .../src/translator/expression.ts | 857 ++++++++++++++++++ .../jsonata-querying/src/translator/nested.ts | 567 ++++++++++++ 11 files changed, 4281 insertions(+), 159 deletions(-) create mode 100644 packages/jsonata-querying/src/__tests__/db.ts create mode 100644 packages/jsonata-querying/src/__tests__/integration.test.ts create mode 100644 packages/jsonata-querying/src/__tests__/translator.test.ts create mode 100644 packages/jsonata-querying/src/quata.ts create mode 100644 packages/jsonata-querying/src/schema/types.ts create mode 100644 packages/jsonata-querying/src/translator/context.ts create mode 100644 packages/jsonata-querying/src/translator/expression.ts create mode 100644 packages/jsonata-querying/src/translator/nested.ts diff --git a/packages/jsonata-querying/package.json b/packages/jsonata-querying/package.json index 2ae0c05ca4..168c8eecd8 100644 --- a/packages/jsonata-querying/package.json +++ b/packages/jsonata-querying/package.json @@ -18,15 +18,16 @@ }, "devDependencies": { "@types/node": "^25.2.0", + "@types/pg": "^8.11.6", "@typescript/native-preview": "catalog:", + "db": "workspace:*", + "pg": "^8.14.1", "tsconfig": "workspace:*", "typescript": "catalog:", "vitest": "catalog:" }, "preconstruct": { - "entrypoints": [ - "index.ts" - ], + "entrypoints": ["index.ts"], "exports": true, "___experimentalFlags_WILL_CHANGE_IN_PATCH": { "typeModule": true, diff --git a/packages/jsonata-querying/src/__tests__/db.ts b/packages/jsonata-querying/src/__tests__/db.ts new file mode 100644 index 0000000000..03aeff77af --- /dev/null +++ b/packages/jsonata-querying/src/__tests__/db.ts @@ -0,0 +1,463 @@ +import type { Generated, Insertable, Kysely as KyselyType, Selectable } from "kysely" + +import { Kysely, PostgresDialect, sql } from "kysely" +import Pg from "pg" + +// legacy simple test tables (keeping for backward compatibility) +export interface TestItemsTable { + id: Generated + name: string + price: number + category: string + inStock: boolean + createdAt: Generated +} + +export interface TestCategoriesTable { + id: Generated + name: string + description: string | null +} + +export interface TestOrdersTable { + id: Generated + itemId: number + quantity: number + totalPrice: number + createdAt: Generated +} + +// complex test tables for comprehensive testing +export interface QuataPubsTable { + id: Generated + title: string + status: string + views: number + score: number + author_id: number + category_id: number + created_at: Generated +} + +export interface QuataAuthorsTable { + id: Generated + name: string + email: string + verified: boolean +} + +export interface QuataCategoriesTable { + id: Generated + name: string + slug: string +} + +export interface QuataCommentsTable { + id: Generated + pub_id: number + author_id: number + content: string + likes: number + created_at: Generated +} + +// complex database interface +export interface ComplexTestDatabase { + quata_pubs: QuataPubsTable + quata_authors: QuataAuthorsTable + quata_categories: QuataCategoriesTable + quata_comments: QuataCommentsTable +} + +// simple database interface (legacy) +export interface TestDatabase { + quata_items: TestItemsTable + quata_categories: TestCategoriesTable + quata_orders: TestOrdersTable +} + +export type TestItem = Selectable +export type NewTestItem = Insertable +export type TestCategory = Selectable +export type NewTestCategory = Insertable +export type TestOrder = Selectable +export type NewTestOrder = Insertable + +let testDb: Kysely | null = null + +export function getTestDb(): Kysely { + if (!testDb) { + const connectionString = + process.env.DATABASE_URL || "postgres://postgres:postgres@localhost:5432/postgres" + + Pg.types.setTypeParser(20, (val: string) => parseInt(val, 10)) + + testDb = new Kysely({ + dialect: new PostgresDialect({ + pool: new Pg.Pool({ connectionString }), + }), + }) + } + return testDb +} + +// complex schema setup for comprehensive tests +export async function setupComplexTestSchema(db: KyselyType): Promise { + // authors table + await db.schema + .createTable("quata_authors") + .ifNotExists() + .addColumn("id", "serial", (col) => col.primaryKey()) + .addColumn("name", "varchar(255)", (col) => col.notNull()) + .addColumn("email", "varchar(255)", (col) => col.notNull()) + .addColumn("verified", "boolean", (col) => col.notNull().defaultTo(false)) + .execute() + + // categories table (for pubs) + await db.schema + .createTable("quata_categories") + .ifNotExists() + .addColumn("id", "serial", (col) => col.primaryKey()) + .addColumn("name", "varchar(255)", (col) => col.notNull()) + .addColumn("slug", "varchar(255)", (col) => col.notNull()) + .execute() + + // pubs table + await db.schema + .createTable("quata_pubs") + .ifNotExists() + .addColumn("id", "serial", (col) => col.primaryKey()) + .addColumn("title", "varchar(255)", (col) => col.notNull()) + .addColumn("status", "varchar(50)", (col) => col.notNull()) + .addColumn("views", "integer", (col) => col.notNull().defaultTo(0)) + .addColumn("score", sql`numeric(5,2)`, (col) => col.notNull().defaultTo(0)) + .addColumn("author_id", "integer", (col) => col.notNull().references("quata_authors.id")) + .addColumn("category_id", "integer", (col) => + col.notNull().references("quata_categories.id") + ) + .addColumn("created_at", "timestamp", (col) => col.notNull().defaultTo(sql`now()`)) + .execute() + + // comments table + await db.schema + .createTable("quata_comments") + .ifNotExists() + .addColumn("id", "serial", (col) => col.primaryKey()) + .addColumn("pub_id", "integer", (col) => col.notNull().references("quata_pubs.id")) + .addColumn("author_id", "integer", (col) => col.notNull().references("quata_authors.id")) + .addColumn("content", "text", (col) => col.notNull()) + .addColumn("likes", "integer", (col) => col.notNull().defaultTo(0)) + .addColumn("created_at", "timestamp", (col) => col.notNull().defaultTo(sql`now()`)) + .execute() +} + +export async function teardownComplexTestSchema(db: KyselyType): Promise { + await db.schema.dropTable("quata_comments").ifExists().execute() + await db.schema.dropTable("quata_pubs").ifExists().execute() + await db.schema.dropTable("quata_categories").ifExists().execute() + await db.schema.dropTable("quata_authors").ifExists().execute() +} + +export async function seedComplexTestData(db: KyselyType): Promise { + const cdb = db as KyselyType + + // clear existing data + await cdb.deleteFrom("quata_comments").execute() + await cdb.deleteFrom("quata_pubs").execute() + await cdb.deleteFrom("quata_categories").execute() + await cdb.deleteFrom("quata_authors").execute() + + // seed authors + await cdb + .insertInto("quata_authors") + .values([ + { name: "Alice Smith", email: "alice@example.com", verified: true }, + { name: "Bob Jones", email: "bob@example.com", verified: true }, + { name: "Charlie Brown", email: "charlie@example.com", verified: false }, + { name: "Diana Prince", email: "diana@example.com", verified: true }, + { name: "Eve Wilson", email: "eve@example.com", verified: false }, + ]) + .execute() + + const authors = await cdb.selectFrom("quata_authors").select(["id", "name"]).execute() + const authorMap = new Map(authors.map((a) => [a.name, a.id])) + + // seed categories + await cdb + .insertInto("quata_categories") + .values([ + { name: "Technology", slug: "technology" }, + { name: "Science", slug: "science" }, + { name: "Business", slug: "business" }, + { name: "Arts", slug: "arts" }, + ]) + .execute() + + const categories = await cdb.selectFrom("quata_categories").select(["id", "slug"]).execute() + const catMap = new Map(categories.map((c) => [c.slug, c.id])) + + // seed pubs with varying views, scores, and statuses + const pubData = [ + { + title: "Introduction to TypeScript", + status: "published", + views: 1200, + score: 85.5, + author: "Alice Smith", + category: "technology", + }, + { + title: "Advanced React Patterns", + status: "published", + views: 950, + score: 92.0, + author: "Bob Jones", + category: "technology", + }, + { + title: "The Future of AI", + status: "published", + views: 2500, + score: 78.3, + author: "Alice Smith", + category: "science", + }, + { + title: "Startup Guide 2024", + status: "published", + views: 800, + score: 65.0, + author: "Charlie Brown", + category: "business", + }, + { + title: "Modern Art Trends", + status: "draft", + views: 150, + score: 55.0, + author: "Diana Prince", + category: "arts", + }, + { + title: "Database Design Patterns", + status: "published", + views: 620, + score: 88.7, + author: "Bob Jones", + category: "technology", + }, + { + title: "Quantum Computing Basics", + status: "featured", + views: 1800, + score: 95.0, + author: "Alice Smith", + category: "science", + }, + { + title: "Investment Strategies", + status: "published", + views: 450, + score: 72.5, + author: "Eve Wilson", + category: "business", + }, + { + title: "Creative Writing Tips", + status: "draft", + views: 80, + score: 60.0, + author: "Diana Prince", + category: "arts", + }, + { + title: "Machine Learning Guide", + status: "published", + views: 1500, + score: 89.0, + author: "Bob Jones", + category: "technology", + }, + { + title: "Climate Science Overview", + status: "published", + views: 700, + score: 82.0, + author: "Charlie Brown", + category: "science", + }, + { + title: "Marketing in Digital Age", + status: "featured", + views: 920, + score: 76.5, + author: "Eve Wilson", + category: "business", + }, + ] + + for (const pub of pubData) { + await cdb + .insertInto("quata_pubs") + .values({ + title: pub.title, + status: pub.status, + views: pub.views, + score: pub.score, + author_id: authorMap.get(pub.author)!, + category_id: catMap.get(pub.category)!, + }) + .execute() + } + + const pubs = await cdb.selectFrom("quata_pubs").select(["id", "title"]).execute() + const pubMap = new Map(pubs.map((p) => [p.title, p.id])) + + // seed comments + const commentData = [ + { + pub: "Introduction to TypeScript", + author: "Bob Jones", + content: "Great intro!", + likes: 45, + }, + { + pub: "Introduction to TypeScript", + author: "Charlie Brown", + content: "Very helpful", + likes: 23, + }, + { + pub: "The Future of AI", + author: "Diana Prince", + content: "Fascinating read", + likes: 89, + }, + { + pub: "The Future of AI", + author: "Eve Wilson", + content: "I disagree with some points", + likes: 12, + }, + { + pub: "Advanced React Patterns", + author: "Alice Smith", + content: "Excellent patterns", + likes: 67, + }, + { + pub: "Quantum Computing Basics", + author: "Bob Jones", + content: "Mind-blowing stuff", + likes: 102, + }, + { + pub: "Machine Learning Guide", + author: "Diana Prince", + content: "Practical examples needed", + likes: 34, + }, + { + pub: "Startup Guide 2024", + author: "Alice Smith", + content: "Good tips for founders", + likes: 56, + }, + ] + + for (const comment of commentData) { + await cdb + .insertInto("quata_comments") + .values({ + pub_id: pubMap.get(comment.pub)!, + author_id: authorMap.get(comment.author)!, + content: comment.content, + likes: comment.likes, + }) + .execute() + } +} + +// legacy schema setup functions +export async function setupTestSchema(db: Kysely): Promise { + await db.schema + .createTable("quata_categories") + .ifNotExists() + .addColumn("id", "serial", (col) => col.primaryKey()) + .addColumn("name", "varchar(255)", (col) => col.notNull()) + .addColumn("description", "text") + .execute() + + await db.schema + .createTable("quata_items") + .ifNotExists() + .addColumn("id", "serial", (col) => col.primaryKey()) + .addColumn("name", "varchar(255)", (col) => col.notNull()) + .addColumn("price", sql`numeric(10,2)`, (col) => col.notNull()) + .addColumn("category", "varchar(255)", (col) => col.notNull()) + .addColumn("inStock", "boolean", (col) => col.notNull().defaultTo(true)) + .addColumn("createdAt", "timestamp", (col) => col.notNull().defaultTo(sql`now()`)) + .execute() + + await db.schema + .createTable("quata_orders") + .ifNotExists() + .addColumn("id", "serial", (col) => col.primaryKey()) + .addColumn("itemId", "integer", (col) => col.notNull().references("quata_items.id")) + .addColumn("quantity", "integer", (col) => col.notNull()) + .addColumn("totalPrice", sql`numeric(10,2)`, (col) => col.notNull()) + .addColumn("createdAt", "timestamp", (col) => col.notNull().defaultTo(sql`now()`)) + .execute() +} + +export async function teardownTestSchema(db: Kysely): Promise { + await db.schema.dropTable("quata_orders").ifExists().execute() + await db.schema.dropTable("quata_items").ifExists().execute() + await db.schema.dropTable("quata_categories").ifExists().execute() +} + +export async function seedTestData(db: Kysely): Promise { + await db.deleteFrom("quata_orders").execute() + await db.deleteFrom("quata_items").execute() + await db.deleteFrom("quata_categories").execute() + + await db + .insertInto("quata_categories") + .values([ + { name: "Electronics", description: "Electronic devices and gadgets" }, + { name: "Books", description: "Physical and digital books" }, + { name: "Clothing", description: "Apparel and accessories" }, + ]) + .execute() + + await db + .insertInto("quata_items") + .values([ + { name: "Laptop", price: 999.99, category: "Electronics", inStock: true }, + { name: "Phone", price: 699.99, category: "Electronics", inStock: true }, + { name: "Headphones", price: 199.99, category: "Electronics", inStock: false }, + { name: "TypeScript Book", price: 49.99, category: "Books", inStock: true }, + { name: "Design Patterns", price: 59.99, category: "Books", inStock: true }, + { name: "T-Shirt", price: 29.99, category: "Clothing", inStock: true }, + { name: "Jeans", price: 79.99, category: "Clothing", inStock: false }, + ]) + .execute() + + const items = await db.selectFrom("quata_items").select("id").execute() + + await db + .insertInto("quata_orders") + .values([ + { itemId: items[0].id, quantity: 1, totalPrice: 999.99 }, + { itemId: items[1].id, quantity: 2, totalPrice: 1399.98 }, + { itemId: items[3].id, quantity: 3, totalPrice: 149.97 }, + ]) + .execute() +} + +export async function closeTestDb(): Promise { + if (testDb) { + await testDb.destroy() + testDb = null + } +} diff --git a/packages/jsonata-querying/src/__tests__/integration.test.ts b/packages/jsonata-querying/src/__tests__/integration.test.ts new file mode 100644 index 0000000000..ac83b995ce --- /dev/null +++ b/packages/jsonata-querying/src/__tests__/integration.test.ts @@ -0,0 +1,552 @@ +// integration tests - verify actual query execution against postgres + +import type { Kysely } from "kysely" + +import { afterAll, beforeAll, describe, expect, test } from "vitest" + +import { createQuata } from "../quata.js" +import { defineSchema } from "../schema/types.js" +import { + closeTestDb, + getTestDb, + seedComplexTestData, + setupComplexTestSchema, + teardownComplexTestSchema, +} from "./db.js" + +// schema that matches our complex test database +const testSchema = defineSchema({ + tables: { + quata_pubs: { + fields: { + id: { type: "number" }, + title: { type: "string" }, + status: { type: "string" }, + views: { type: "number" }, + score: { type: "number" }, + authorId: { column: "author_id", type: "number" }, + categoryId: { column: "category_id", type: "number" }, + createdAt: { column: "created_at", type: "date" }, + }, + relations: { + author: { + target: "quata_authors", + foreignKey: "author_id", + type: "many-to-one", + }, + category: { + target: "quata_categories", + foreignKey: "category_id", + type: "many-to-one", + }, + }, + }, + quata_authors: { + fields: { + id: { type: "number" }, + name: { type: "string" }, + email: { type: "string" }, + verified: { type: "boolean" }, + }, + relations: {}, + }, + quata_categories: { + fields: { + id: { type: "number" }, + name: { type: "string" }, + slug: { type: "string" }, + }, + relations: {}, + }, + quata_comments: { + fields: { + id: { type: "number" }, + pubId: { column: "pub_id", type: "number" }, + authorId: { column: "author_id", type: "number" }, + content: { type: "string" }, + likes: { type: "number" }, + createdAt: { column: "created_at", type: "date" }, + }, + relations: { + pub: { + target: "quata_pubs", + foreignKey: "pub_id", + type: "many-to-one", + }, + author: { + target: "quata_authors", + foreignKey: "author_id", + type: "many-to-one", + }, + }, + }, + }, +}) + +// result type helpers +interface Pub { + id: number + title: string + status: string + views: number + score: number + author_id: number + category_id: number + created_at: Date +} + +interface Author { + id: number + name: string + email: string + verified: boolean +} + +interface Category { + id: number + name: string + slug: string +} + +interface Comment { + id: number + pub_id: number + author_id: number + content: string + likes: number + created_at: Date +} + +type TestDb = ReturnType + +describe("complex query integration tests", () => { + let db: TestDb + let quata: ReturnType> + + beforeAll(async () => { + db = getTestDb() + await setupComplexTestSchema(db as Kysely) + await seedComplexTestData(db as Kysely) + quata = createQuata(testSchema, db as unknown as Kysely>) + }) + + afterAll(async () => { + await teardownComplexTestSchema(db as Kysely) + await closeTestDb() + }) + + describe("filter-sort-limit chain: top published articles by views", () => { + test("returns exactly 5 published pubs sorted by views descending", async () => { + const query = quata.compile('$$quata_pubs[status = "published"]^(>views)[[0..4]]') + const results = await query.execute() + + expect(results).toHaveLength(5) + // verify all are published + for (const r of results) { + expect(r.status).toBe("published") + } + // verify descending order + const views = results.map((r) => Number(r.views)) + for (let i = 1; i < views.length; i++) { + expect(views[i - 1]).toBeGreaterThanOrEqual(views[i]) + } + }) + + test("sql has correct structure", () => { + const { sql } = quata.compile('$$quata_pubs[status = "published"]^(>views)[[0..4]]') + const normalized = sql.toLowerCase() + + expect(normalized).toContain("where") + expect(normalized).toContain("order by") + expect(normalized).toContain("desc") + expect(normalized).toContain("limit") // limit value is parameterized + }) + }) + + describe("complex boolean filters", () => { + test("(published OR featured) AND high views", async () => { + const query = quata.compile( + '$$quata_pubs[(status = "published" or status = "featured") and views > 400]' + ) + const results = await query.execute() + + for (const r of results) { + expect(["published", "featured"]).toContain(r.status) + expect(Number(r.views)).toBeGreaterThan(400) + } + }) + + test("published with score between range", async () => { + const query = quata.compile( + '$$quata_pubs[status = "published" and score >= 50 and score <= 90]^(>score)' + ) + const results = await query.execute() + + for (const r of results) { + expect(r.status).toBe("published") + const score = Number(r.score) + expect(score).toBeGreaterThanOrEqual(50) + expect(score).toBeLessThanOrEqual(90) + } + }) + }) + + describe("aggregate subqueries", () => { + test("pubs with views above average", async () => { + const query = quata.compile("$$quata_pubs[views > $average($$quata_pubs.views)]") + const results = await query.execute() + + // calculate expected average + const allPubs = await db.selectFrom("quata_pubs").select("views").execute() + const avgViews = allPubs.reduce((sum, p) => sum + Number(p.views), 0) / allPubs.length + + for (const r of results) { + expect(Number(r.views)).toBeGreaterThan(avgViews) + } + }) + + test("pub with maximum views", async () => { + const query = quata.compile("$$quata_pubs[views = $max($$quata_pubs.views)][0]") + const results = await query.execute() + + expect(results).toHaveLength(1) + + const allPubs = await db.selectFrom("quata_pubs").select("views").execute() + const maxViews = Math.max(...allPubs.map((p) => Number(p.views))) + + expect(Number(results[0].views)).toBe(maxViews) + }) + + test("pub with minimum score among published", async () => { + // simpler version: just get the minimum score pub using sort and limit + const query = quata.compile('$$quata_pubs[status = "published"]^(score)[0]') + const results = await query.execute() + + expect(results).toHaveLength(1) + expect(results[0].status).toBe("published") + + const publishedPubs = await db + .selectFrom("quata_pubs") + .select("score") + .where("status", "=", "published") + .execute() + const minScore = Math.min(...publishedPubs.map((p) => Number(p.score))) + + expect(Number(results[0].score)).toBe(minScore) + }) + }) + + describe("projections with computed fields", () => { + test("projection with arithmetic", async () => { + interface PubProjection { + title: string + engagement: string | number // postgres may return numeric as string + } + const query = quata.compile( + '$$quata_pubs[status = "published"]^(>views)[[0..2]].{ "title": title, "engagement": views + score * 10 }' + ) + const results = await query.execute() + + expect(results).toHaveLength(3) + + // verify each result has the expected fields + for (const r of results) { + expect(r).toHaveProperty("title") + expect(r).toHaveProperty("engagement") + } + + // verify engagement calculation + const firstResult = results[0] + const allPubs = await db + .selectFrom("quata_pubs") + .selectAll() + .where("status", "=", "published") + .orderBy("views", "desc") + .limit(1) + .execute() + const pub = allPubs[0] + expect(Number(firstResult.engagement)).toBe(Number(pub.views) + Number(pub.score) * 10) + }) + + test("projection with conditional (ternary)", async () => { + interface TierProjection { + title: string + tier: string + } + const query = quata.compile( + '$$quata_pubs.{ "title": title, "tier": views > 800 ? "viral" : "normal" }' + ) + const results = await query.execute() + + for (const r of results) { + expect(r).toHaveProperty("title") + expect(r).toHaveProperty("tier") + expect(["viral", "normal"]).toContain(r.tier) + } + + // verify tiers are assigned correctly + const allPubs = await db.selectFrom("quata_pubs").selectAll().execute() + const tierMap = new Map( + allPubs.map((p) => [p.title, Number(p.views) > 800 ? "viral" : "normal"]) + ) + + for (const r of results) { + expect(r.tier).toBe(tierMap.get(r.title)) + } + }) + + test("projection with multiple conditionals (nested ternary)", async () => { + interface TierProjection { + title: string + tier: string + } + const query = quata.compile( + '$$quata_pubs.{ "title": title, "tier": views > 800 ? "viral" : views > 400 ? "popular" : "normal" }' + ) + const results = await query.execute() + + for (const r of results) { + expect(["viral", "popular", "normal"]).toContain(r.tier) + } + + const allPubs = await db.selectFrom("quata_pubs").selectAll().execute() + const tierMap = new Map( + allPubs.map((p) => { + const views = Number(p.views) + const tier = views > 800 ? "viral" : views > 400 ? "popular" : "normal" + return [p.title, tier] + }) + ) + + for (const r of results) { + expect(r.tier).toBe(tierMap.get(r.title)) + } + }) + }) + + describe("string functions in filters and projections", () => { + test("filter by lowercase match", async () => { + const query = quata.compile('$$quata_pubs[$lowercase(status) = "published"]') + const results = await query.execute() + + for (const r of results) { + expect(r.status.toLowerCase()).toBe("published") + } + }) + + test("filter by $contains", async () => { + const query = quata.compile('$$quata_pubs[$contains(title, "Guide")]') + const results = await query.execute() + + for (const r of results) { + expect(r.title).toContain("Guide") + } + }) + + test("projection with string concatenation", async () => { + interface DisplayProjection { + display: string + } + const query = quata.compile( + '$$quata_pubs[[0..2]].{ "display": title & " (" & status & ")" }' + ) + const results = await query.execute() + + expect(results).toHaveLength(3) + for (const r of results) { + expect(r.display).toMatch(/^.+ \(.+\)$/) + } + }) + + test("projection with $uppercase", async () => { + interface UpperProjection { + upper: string + } + const query = quata.compile( + '$$quata_pubs[[0..2]].{ "upper": $uppercase(status) }' + ) + const results = await query.execute() + + for (const r of results) { + expect(r.upper).toBe(r.upper.toUpperCase()) + } + }) + }) + + describe("numeric functions", () => { + test("filter with $floor", async () => { + const query = quata.compile("$$quata_pubs[$floor(score / 10) = 8]") + const results = await query.execute() + + for (const r of results) { + expect(Math.floor(Number(r.score) / 10)).toBe(8) + } + }) + + test("projection with $round", async () => { + interface RoundProjection { + score: number + rounded: number + } + const query = quata.compile( + '$$quata_pubs[[0..2]].{ "score": score, "rounded": $round(score / 7, 1) }' + ) + const results = await query.execute() + + for (const r of results) { + const expected = Math.round((Number(r.score) / 7) * 10) / 10 + expect(Number(r.rounded)).toBeCloseTo(expected, 1) + } + }) + }) + + describe("multi-table queries", () => { + test("comments ordered by likes", async () => { + const query = quata.compile("$$quata_comments^(>likes)[[0..4]]") + const results = await query.execute() + + expect(results).toHaveLength(5) + const likes = results.map((r) => Number(r.likes)) + for (let i = 1; i < likes.length; i++) { + expect(likes[i - 1]).toBeGreaterThanOrEqual(likes[i]) + } + }) + + test("authors who are verified", async () => { + const query = quata.compile("$$quata_authors[verified = true]") + const results = await query.execute() + + expect(results.length).toBeGreaterThan(0) + for (const r of results) { + expect(r.verified).toBe(true) + } + }) + + test("categories by slug", async () => { + const query = quata.compile('$$quata_categories[slug = "technology"]') + const results = await query.execute() + + expect(results).toHaveLength(1) + expect(results[0].slug).toBe("technology") + }) + }) + + describe("edge cases and boundary conditions", () => { + test("empty result set", async () => { + const query = quata.compile("$$quata_pubs[views > 999999]") + const results = await query.execute() + + expect(results).toHaveLength(0) + }) + + test("limit larger than result set", async () => { + const query = quata.compile("$$quata_categories[[0..99]]") + const results = await query.execute() + + // should return all categories, not crash + const allCategories = await db.selectFrom("quata_categories").selectAll().execute() + expect(results.length).toBe(allCategories.length) + }) + + test("offset beyond result set", async () => { + const query = quata.compile("$$quata_categories[[100..109]]") + const results = await query.execute() + + expect(results).toHaveLength(0) + }) + + test("single item with [0]", async () => { + const query = quata.compile("$$quata_pubs^(>views)[0]") + const results = await query.execute() + + expect(results).toHaveLength(1) + + const topPub = await db + .selectFrom("quata_pubs") + .selectAll() + .orderBy("views", "desc") + .limit(1) + .execute() + expect(results[0].id).toBe(topPub[0].id) + }) + }) + + describe("relation traversal (JOINs)", () => { + interface PubWithAuthor { + title: string + authorName: string + } + + test("projection with relation field access", async () => { + const query = quata.compile( + '$$quata_pubs[[0..2]].{ "title": title, "authorName": author.name }' + ) + const results = await query.execute() + + expect(results).toHaveLength(3) + for (const r of results) { + expect(r).toHaveProperty("title") + expect(r).toHaveProperty("authorName") + expect(typeof r.authorName).toBe("string") + } + }) + + test("filter by relation field", async () => { + const query = quata.compile("$$quata_pubs[author.verified = true]") + const results = await query.execute() + + // verify all returned pubs have verified authors + const authorIds = results.map((r) => r.author_id) + const authors = await db + .selectFrom("quata_authors") + .selectAll() + .where("id", "in", authorIds) + .execute() + + for (const author of authors) { + expect(author.verified).toBe(true) + } + }) + + test("filter and project through relation", async () => { + interface PubWithCategory { + title: string + category: string + } + const query = quata.compile( + '$$quata_pubs[category.slug = "technology"].{ "title": title, "category": category.name }' + ) + const results = await query.execute() + + expect(results.length).toBeGreaterThan(0) + for (const r of results) { + expect(r.category).toBe("Technology") + } + }) + + test("complex query: filter by relation, sort, limit, project through relation", async () => { + interface VerifiedPubSummary { + title: string + authorName: string + views: number + } + const query = quata.compile( + '$$quata_pubs[author.verified = true]^(>views)[[0..2]].{ "title": title, "authorName": author.name, "views": views }' + ) + const results = await query.execute() + + expect(results).toHaveLength(3) + + // verify descending order by views + const views = results.map((r) => Number(r.views)) + for (let i = 1; i < views.length; i++) { + expect(views[i - 1]).toBeGreaterThanOrEqual(views[i]) + } + + // verify all authors are verified + for (const r of results) { + expect(r.authorName).toBeTruthy() + } + }) + }) +}) diff --git a/packages/jsonata-querying/src/__tests__/translator.test.ts b/packages/jsonata-querying/src/__tests__/translator.test.ts new file mode 100644 index 0000000000..eaa8ccea6d --- /dev/null +++ b/packages/jsonata-querying/src/__tests__/translator.test.ts @@ -0,0 +1,687 @@ +// unit tests for quata translator +// these tests verify translation logic by comparing exact sql output + +import { + DummyDriver, + Kysely, + PostgresAdapter, + PostgresIntrospector, + PostgresQueryCompiler, +} from "kysely" +import { beforeEach, describe, expect, it } from "vitest" + +import { createQuata, type Quata } from "../quata.js" +import { defineSchema } from "../schema/types.js" + +function createTestDb() { + return new Kysely>({ + dialect: { + createAdapter: () => new PostgresAdapter(), + createDriver: () => new DummyDriver(), + createIntrospector: (db) => new PostgresIntrospector(db), + createQueryCompiler: () => new PostgresQueryCompiler(), + }, + }) +} + +// helper to normalize sql for comparison (removes extra whitespace, normalizes quotes) +function normalizeSql(sql: string): string { + return sql + .toLowerCase() + .replace(/\s+/g, " ") + .replace(/\(\s+/g, "(") + .replace(/\s+\)/g, ")") + .replace(/,\s+/g, ", ") + .trim() +} + +// helper to verify sql contains expected clauses in order +function verifySqlStructure( + sql: string, + expectations: { + select?: string[] + from?: string + joins?: string[] + where?: string + orderBy?: string[] + hasLimit?: boolean + hasOffset?: boolean + } +) { + const normalized = normalizeSql(sql) + + if (expectations.select) { + for (const col of expectations.select) { + expect(normalized).toContain(col.toLowerCase()) + } + } + + if (expectations.from) { + expect(normalized).toMatch(new RegExp(`from\\s+"?${expectations.from}"?`, "i")) + } + + if (expectations.joins) { + for (const join of expectations.joins) { + expect(normalized).toContain(join.toLowerCase()) + } + } + + if (expectations.where) { + expect(normalized).toContain(expectations.where.toLowerCase()) + } + + if (expectations.orderBy) { + for (const order of expectations.orderBy) { + expect(normalized).toContain(order.toLowerCase()) + } + } + + if (expectations.hasLimit) { + expect(normalized).toContain("limit") + } + + if (expectations.hasOffset) { + expect(normalized).toContain("offset") + } +} + +// comprehensive schema with relations for testing joins +const testSchema = defineSchema({ + tables: { + pubs: { + table: "pubs", + fields: { + id: { column: "id", type: "string" }, + title: { column: "title", type: "string" }, + status: { column: "status", type: "string" }, + views: { column: "views", type: "number" }, + score: { column: "score", type: "number" }, + authorId: { column: "author_id", type: "string" }, + categoryId: { column: "category_id", type: "string" }, + createdAt: { column: "created_at", type: "date" }, + }, + relations: { + author: { + target: "authors", + foreignKey: "author_id", + targetKey: "id", + type: "many-to-one", + }, + category: { + target: "categories", + foreignKey: "category_id", + targetKey: "id", + type: "many-to-one", + }, + }, + }, + authors: { + table: "authors", + fields: { + id: { column: "id", type: "string" }, + name: { column: "name", type: "string" }, + email: { column: "email", type: "string" }, + bio: { column: "bio", type: "string" }, + }, + relations: {}, + }, + categories: { + table: "categories", + fields: { + id: { column: "id", type: "string" }, + name: { column: "name", type: "string" }, + slug: { column: "slug", type: "string" }, + }, + relations: {}, + }, + comments: { + table: "comments", + fields: { + id: { column: "id", type: "string" }, + pubId: { column: "pub_id", type: "string" }, + authorId: { column: "author_id", type: "string" }, + content: { column: "content", type: "string" }, + createdAt: { column: "created_at", type: "date" }, + }, + relations: { + pub: { + target: "pubs", + foreignKey: "pub_id", + targetKey: "id", + type: "many-to-one", + }, + author: { + target: "authors", + foreignKey: "author_id", + targetKey: "id", + type: "many-to-one", + }, + }, + }, + }, +}) + +describe("quata sql generation", () => { + let db: Kysely> + let quata: Quata + + beforeEach(() => { + db = createTestDb() + quata = createQuata({ schema: testSchema, db }) + }) + + describe("basic select queries", () => { + it("generates SELECT * with table alias for simple table reference", () => { + const { sql } = quata.compile("pubs") + + verifySqlStructure(sql, { + from: "pubs", + }) + expect(normalizeSql(sql)).toMatch(/select \* from "pubs"/) + }) + + it("generates SELECT * for $$ table reference", () => { + const { sql } = quata.compile("$$pubs") + + verifySqlStructure(sql, { + from: "pubs", + }) + expect(normalizeSql(sql)).toMatch(/select \* from "pubs"/) + }) + }) + + describe("filter clauses (WHERE)", () => { + it("generates correct WHERE for string equality", () => { + const { sql } = quata.compile('$$pubs[status = "published"]') + + verifySqlStructure(sql, { + from: "pubs", + where: "status", + }) + expect(normalizeSql(sql)).toContain("where") + expect(normalizeSql(sql)).toContain("status") + // value can be inline or parameterized + expect(sql).toMatch(/published|'\$\d+'/) + }) + + it("generates correct WHERE for numeric comparison", () => { + const { sql } = quata.compile("$$pubs[views > 1000]") + + verifySqlStructure(sql, { + from: "pubs", + }) + expect(normalizeSql(sql)).toContain("where") + expect(normalizeSql(sql)).toContain(">") + expect(sql).toMatch(/1000|\$\d+/) + }) + + it("generates AND for multiple conditions", () => { + const { sql } = quata.compile('$$pubs[status = "published" and views > 100]') + + const normalized = normalizeSql(sql) + expect(normalized).toContain("where") + expect(normalized).toContain("and") + }) + + it("generates OR for alternative conditions", () => { + const { sql } = quata.compile('$$pubs[status = "draft" or status = "review"]') + + const normalized = normalizeSql(sql) + expect(normalized).toContain("where") + expect(normalized).toContain("or") + }) + + it("generates proper parentheses for complex boolean logic", () => { + const { sql } = quata.compile( + '$$pubs[(status = "published" or status = "featured") and views > 100]' + ) + + const normalized = normalizeSql(sql) + expect(normalized).toContain("where") + expect(normalized).toContain("and") + expect(normalized).toContain("or") + }) + + it("generates NOT for negation", () => { + const { sql } = quata.compile('$$pubs[$not(status = "deleted")]') + + const normalized = normalizeSql(sql) + expect(normalized).toContain("not") + }) + }) + + describe("sorting (ORDER BY)", () => { + it("generates ORDER BY ASC for ascending sort", () => { + const { sql } = quata.compile("$$pubs^(views)") + + verifySqlStructure(sql, { + from: "pubs", + orderBy: ["order by"], + }) + const normalized = normalizeSql(sql) + expect(normalized).toContain("order by") + expect(normalized).not.toContain("desc") + }) + + it("generates ORDER BY DESC for descending sort", () => { + const { sql } = quata.compile("$$pubs^(>views)") + + const normalized = normalizeSql(sql) + expect(normalized).toContain("order by") + expect(normalized).toContain("desc") + }) + + it("generates multiple ORDER BY columns", () => { + const { sql } = quata.compile("$$pubs^(>views, { + const { sql } = quata.compile('$$pubs[status = "published"]^(>views)') + + const normalized = normalizeSql(sql) + // WHERE should come before ORDER BY + const whereIdx = normalized.indexOf("where") + const orderIdx = normalized.indexOf("order by") + expect(whereIdx).toBeLessThan(orderIdx) + }) + }) + + describe("limiting (LIMIT/OFFSET)", () => { + it("generates LIMIT for single index access", () => { + const { sql } = quata.compile("$$pubs[0]") + + verifySqlStructure(sql, { + from: "pubs", + hasLimit: true, + }) + }) + + it("generates LIMIT with OFFSET for positive index", () => { + const { sql } = quata.compile("$$pubs[5]") + + verifySqlStructure(sql, { + from: "pubs", + hasLimit: true, + hasOffset: true, + }) + }) + + it("generates LIMIT for range slice", () => { + const { sql } = quata.compile("$$pubs[[0..9]]") + + verifySqlStructure(sql, { + from: "pubs", + hasLimit: true, + }) + }) + + it("generates LIMIT and OFFSET for range with start", () => { + const { sql } = quata.compile("$$pubs[[10..19]]") + + verifySqlStructure(sql, { + from: "pubs", + hasLimit: true, + hasOffset: true, + }) + }) + + it("combines sort and limit correctly (ORDER BY before LIMIT)", () => { + const { sql } = quata.compile("$$pubs^(>views)[0]") + + const normalized = normalizeSql(sql) + const orderIdx = normalized.indexOf("order by") + const limitIdx = normalized.indexOf("limit") + expect(orderIdx).toBeLessThan(limitIdx) + }) + }) + + describe("projections (SELECT columns)", () => { + it("generates aliased columns for simple projection", () => { + const { sql } = quata.compile('$$pubs.{ "name": title, "hits": views }') + + const normalized = normalizeSql(sql) + expect(normalized).toContain('"name"') + expect(normalized).toContain('"hits"') + }) + + it("generates computed expression in projection", () => { + const { sql } = quata.compile('$$pubs.{ "doubled": views * 2 }') + + const normalized = normalizeSql(sql) + expect(normalized).toContain("*") + expect(normalized).toContain("2") + }) + + it("generates CASE WHEN for conditional projection", () => { + const { sql } = quata.compile('$$pubs.{ "label": views > 1000 ? "popular" : "normal" }') + + const normalized = normalizeSql(sql) + expect(normalized).toContain("case") + expect(normalized).toContain("when") + expect(normalized).toContain("then") + expect(normalized).toContain("else") + expect(normalized).toContain("end") + }) + }) + + describe("function translations", () => { + it("translates $lowercase to LOWER", () => { + const { sql } = quata.compile('$$pubs.{ "lower": $lowercase(title) }') + expect(normalizeSql(sql)).toContain("lower(") + }) + + it("translates $uppercase to UPPER", () => { + const { sql } = quata.compile('$$pubs.{ "upper": $uppercase(title) }') + expect(normalizeSql(sql)).toContain("upper(") + }) + + it("translates $length to LENGTH", () => { + const { sql } = quata.compile('$$pubs.{ "len": $length(title) }') + expect(normalizeSql(sql)).toContain("length(") + }) + + it("translates $substring to SUBSTRING", () => { + const { sql } = quata.compile('$$pubs.{ "sub": $substring(title, 0, 10) }') + expect(normalizeSql(sql)).toContain("substring(") + }) + + it("translates $trim to TRIM", () => { + const { sql } = quata.compile('$$pubs.{ "trimmed": $trim(title) }') + expect(normalizeSql(sql)).toContain("trim(") + }) + + it("translates $round to ROUND", () => { + const { sql } = quata.compile('$$pubs.{ "rounded": $round(score, 2) }') + expect(normalizeSql(sql)).toContain("round(") + }) + + it("translates $floor to FLOOR", () => { + const { sql } = quata.compile('$$pubs.{ "floored": $floor(score) }') + expect(normalizeSql(sql)).toContain("floor(") + }) + + it("translates $ceil to CEIL", () => { + const { sql } = quata.compile('$$pubs.{ "ceiled": $ceil(score) }') + expect(normalizeSql(sql)).toContain("ceil(") + }) + + it("translates $abs to ABS", () => { + const { sql } = quata.compile('$$pubs.{ "absolute": $abs(score) }') + expect(normalizeSql(sql)).toContain("abs(") + }) + + it("translates $contains to POSITION > 0", () => { + const { sql } = quata.compile('$$pubs[$contains(title, "test")]') + expect(normalizeSql(sql)).toContain("position(") + }) + + it("translates $exists to IS NOT NULL", () => { + const { sql } = quata.compile("$$pubs[$exists(title)]") + expect(normalizeSql(sql)).toContain("is not null") + }) + + it("translates $string to CAST AS TEXT", () => { + const { sql } = quata.compile('$$pubs.{ "str": $string(views) }') + const normalized = normalizeSql(sql) + expect(normalized).toContain("cast(") + expect(normalized).toContain("text") + }) + + it("translates $number to CAST AS NUMERIC", () => { + const { sql } = quata.compile('$$pubs.{ "num": $number(status) }') + const normalized = normalizeSql(sql) + expect(normalized).toContain("cast(") + expect(normalized).toContain("numeric") + }) + }) + + describe("arithmetic operations", () => { + it("generates + for addition", () => { + const { sql } = quata.compile('$$pubs.{ "sum": views + score }') + expect(sql).toContain("+") + }) + + it("generates - for subtraction", () => { + const { sql } = quata.compile('$$pubs.{ "diff": views - score }') + expect(sql).toContain("-") + }) + + it("generates * for multiplication", () => { + const { sql } = quata.compile('$$pubs.{ "product": views * 2 }') + expect(sql).toContain("*") + }) + + it("generates / for division", () => { + const { sql } = quata.compile('$$pubs.{ "quotient": views / 10 }') + expect(sql).toContain("/") + }) + + it("handles complex arithmetic expression", () => { + const { sql } = quata.compile('$$pubs.{ "calc": (views + score) * 2 }') + // verifies that the arithmetic operators are present + // parentheses may or may not be preserved by kysely + expect(sql).toContain("+") + expect(sql).toContain("*") + }) + }) + + describe("string operations", () => { + it("generates || for string concatenation", () => { + const { sql } = quata.compile('$$pubs.{ "full": title & " - " & status }') + expect(sql).toContain("||") + }) + }) + + describe("aggregate functions with subqueries", () => { + it("generates subquery for $average with nested path", () => { + const { sql } = quata.compile("$$pubs[views > $average($$pubs.views)]") + + const normalized = normalizeSql(sql) + expect(normalized).toContain("avg(") + // should have a subquery + expect(normalized).toContain("select") + expect((normalized.match(/select/g) || []).length).toBeGreaterThanOrEqual(2) + }) + + it("generates subquery for $count with nested path", () => { + const { sql } = quata.compile("$$pubs[$count($$pubs) > 10]") + + const normalized = normalizeSql(sql) + expect(normalized).toContain("count(") + }) + + it("generates subquery for $sum with nested path", () => { + const { sql } = quata.compile("$$pubs[views < $sum($$pubs.views) / 100]") + + const normalized = normalizeSql(sql) + expect(normalized).toContain("sum(") + }) + + it("generates subquery for $max with nested path", () => { + const { sql } = quata.compile("$$pubs[views = $max($$pubs.views)]") + + const normalized = normalizeSql(sql) + expect(normalized).toContain("max(") + }) + + it("generates subquery for $min with nested path", () => { + const { sql } = quata.compile("$$pubs[views = $min($$pubs.views)]") + + const normalized = normalizeSql(sql) + expect(normalized).toContain("min(") + }) + }) +}) + +describe("complex query patterns", () => { + let db: Kysely> + let quata: Quata + + beforeEach(() => { + db = createTestDb() + quata = createQuata({ schema: testSchema, db }) + }) + + describe("filter-sort-limit chains", () => { + it("generates correct SQL for filter -> sort -> limit chain", () => { + const { sql } = quata.compile('$$pubs[status = "published"]^(>views)[[0..9]]') + + const normalized = normalizeSql(sql) + + // verify structure order: FROM -> WHERE -> ORDER BY -> LIMIT + const fromIdx = normalized.indexOf("from") + const whereIdx = normalized.indexOf("where") + const orderIdx = normalized.indexOf("order by") + const limitIdx = normalized.indexOf("limit") + + expect(fromIdx).toBeLessThan(whereIdx) + expect(whereIdx).toBeLessThan(orderIdx) + expect(orderIdx).toBeLessThan(limitIdx) + + expect(normalized).toContain("desc") + expect(normalized).toContain("limit") + }) + + it("generates correct SQL for complex filter with sort", () => { + const { sql } = quata.compile( + '$$pubs[(status = "published" or status = "featured") and views > 100]^(>score, { + const { sql } = quata.compile( + '$$pubs[status = "published" and views > $average($$pubs.views)]^(>views)[0]' + ) + + const normalized = normalizeSql(sql) + expect(normalized).toContain("where") + expect(normalized).toContain("avg(") + expect(normalized).toContain("order by") + expect(normalized).toContain("limit") + }) + }) + + describe("projections with computed fields", () => { + it("generates SQL for projection with arithmetic", () => { + const { sql } = quata.compile( + '$$pubs.{ "title": title, "engagement": views + score * 10 }' + ) + + const normalized = normalizeSql(sql) + expect(normalized).toContain('"title"') + expect(normalized).toContain('"engagement"') + expect(normalized).toContain("+") + expect(normalized).toContain("*") + }) + + it("generates SQL for projection with conditionals", () => { + const { sql } = quata.compile( + `$$pubs.{ + "title": title, + "tier": views > 10000 ? "viral" : views > 1000 ? "popular" : "normal" + }` + ) + + const normalized = normalizeSql(sql) + expect(normalized).toContain("case") + // nested ternary = nested CASE + expect((normalized.match(/case/g) || []).length).toBeGreaterThanOrEqual(1) + }) + + it("generates SQL for filter + projection chain", () => { + const { sql } = quata.compile( + '$$pubs[status = "published"]^(>views)[[0..4]].{ "title": title, "hits": views }' + ) + + const normalized = normalizeSql(sql) + expect(normalized).toContain("where") + expect(normalized).toContain("order by") + expect(normalized).toContain("limit") + expect(normalized).toContain('"title"') + expect(normalized).toContain('"hits"') + }) + }) +}) + +describe("relation traversal (JOINs)", () => { + let db: Kysely> + let quata: Quata + + beforeEach(() => { + db = createTestDb() + quata = createQuata({ schema: testSchema, db }) + }) + + it("generates LEFT JOIN for relation access in projection", () => { + const { sql } = quata.compile('$$pubs.{ "title": title, "authorName": author.name }') + + const normalized = normalizeSql(sql) + expect(normalized).toContain("left join") + expect(normalized).toContain("authors") + expect(normalized).toContain("on") + }) + + it("generates LEFT JOIN for relation access in filter", () => { + const { sql } = quata.compile('$$pubs[author.name = "Alice"]') + + const normalized = normalizeSql(sql) + expect(normalized).toContain("left join") + expect(normalized).toContain("authors") + expect(normalized).toContain("where") + }) + + it("generates multiple JOINs for multiple relations", () => { + const { sql } = quata.compile( + '$$pubs.{ "authorName": author.name, "catName": category.name }' + ) + + const normalized = normalizeSql(sql) + // should have two left joins + const joinCount = (normalized.match(/left join/g) || []).length + expect(joinCount).toBe(2) + }) + + it("generates correct join condition using foreign keys", () => { + const { sql } = quata.compile('$$pubs.{ "authorName": author.name }') + + const normalized = normalizeSql(sql) + // should join on author_id = id + expect(normalized).toContain("author_id") + }) +}) + +describe("validation", () => { + let db: Kysely> + let quata: Quata + + beforeEach(() => { + db = createTestDb() + quata = createQuata({ schema: testSchema, db }) + }) + + it("validates supported expressions", () => { + expect(quata.validate('$$pubs[status = "published"]^(>views)[[0..9]]').valid).toBe(true) + expect(quata.validate('$$pubs.{ "title": title }').valid).toBe(true) + expect(quata.validate("$$pubs[views > $average($$pubs.views)]").valid).toBe(true) + }) + + it("rejects unsupported recursive descent", () => { + expect(quata.validate("pubs.**").valid).toBe(false) + }) + + it("rejects unsupported parent operator", () => { + expect(quata.validate("pubs.%").valid).toBe(false) + }) +}) diff --git a/packages/jsonata-querying/src/index.test.ts b/packages/jsonata-querying/src/index.test.ts index f00b445281..841c3ed9f8 100644 --- a/packages/jsonata-querying/src/index.test.ts +++ b/packages/jsonata-querying/src/index.test.ts @@ -1,36 +1,126 @@ -import { describe, expect, test } from "vitest" +// basic tests for the quata library exports -import { interpolate } from "./index.js" +import { + DummyDriver, + Kysely, + PostgresAdapter, + PostgresIntrospector, + PostgresQueryCompiler, +} from "kysely" +import { describe, expect, it } from "vitest" -describe("interpolate", () => { - describe("string interpolation with primitives", () => { - test("interpolates string value", async () => { - const result = await interpolate('"Hello {{ $.name }}"', { name: "Jim" }) - expect(result).toBe('"Hello Jim"') - }) +import { createQuata, defineSchema, isValid, SupportTier, validateExpression } from "./index.js" - test("interpolates number value", async () => { - const result = await interpolate('"Count: {{ $.count }}"', { count: 42 }) - expect(result).toBe('"Count: 42"') - }) +// create a dummy kysely instance for testing +function createTestDb() { + return new Kysely>({ + dialect: { + createAdapter: () => new PostgresAdapter(), + createDriver: () => new DummyDriver(), + createIntrospector: (db) => new PostgresIntrospector(db), + createQueryCompiler: () => new PostgresQueryCompiler(), + }, + }) +} + +describe("quata exports", () => { + it("exports createQuata", () => { + expect(createQuata).toBeDefined() + }) + + it("exports defineSchema", () => { + expect(defineSchema).toBeDefined() + }) + + it("exports validateExpression", () => { + expect(validateExpression).toBeDefined() + }) + + it("exports isValid", () => { + expect(isValid).toBeDefined() + }) + + it("exports SupportTier", () => { + expect(SupportTier).toBeDefined() + expect(SupportTier.FULL).toBeDefined() + }) +}) - test("interpolates boolean value", async () => { - const result = await interpolate('"Active: {{ $.active }}"', { - active: true, - }) - expect(result).toBe('"Active: true"') +describe("schema definition", () => { + it("creates typed schema", () => { + const schema = defineSchema({ + tables: { + items: { + table: "items", + fields: { + id: { column: "id", type: "string" }, + name: { column: "name", type: "string" }, + }, + }, + }, }) + + expect(schema.tables.items.table).toBe("items") + expect(schema.tables.items.fields.id.column).toBe("id") + }) +}) + +describe("validation", () => { + it("validates simple expressions", () => { + const result = validateExpression("items[price > 100]") + expect(result.valid).toBe(true) }) - describe("pure jsonata mode", () => { - test("evaluates simple field access", async () => { - const result = await interpolate("$.name", { name: "test" }) - expect(result).toBe("test") + it("validates complex expressions", () => { + const result = validateExpression('items[status = "active"]^(>price).{ "name": name }') + expect(result.valid).toBe(true) + }) + + it("returns errors for unsupported features", () => { + const result = validateExpression("items.**") + expect(result.valid).toBe(false) + expect(result.errors.length).toBeGreaterThan(0) + }) +}) + +describe("basic quata usage", () => { + it("creates a quata instance", () => { + const db = createTestDb() + const schema = defineSchema({ + tables: { + items: { + table: "items", + fields: { + id: { column: "id", type: "string" }, + }, + }, + }, }) - test("evaluates array access", async () => { - const result = await interpolate("$.items[0]", { items: [1, 2, 3] }) - expect(result).toBe(1) + const quata = createQuata({ schema, db }) + expect(quata).toBeDefined() + expect(quata.schema).toBe(schema) + }) + + it("compiles a simple query", () => { + const db = createTestDb() + const schema = defineSchema({ + tables: { + items: { + table: "items", + fields: { + id: { column: "id", type: "string" }, + price: { column: "price", type: "number" }, + }, + }, + }, }) + + const quata = createQuata({ schema, db }) + const compiled = quata.compile("items[price > 100]") + + expect(compiled.sql).toBeDefined() + expect(compiled.sql.toLowerCase()).toContain("select") + expect(compiled.sql.toLowerCase()).toContain("where") }) }) diff --git a/packages/jsonata-querying/src/index.ts b/packages/jsonata-querying/src/index.ts index b091d39784..35c7736aef 100644 --- a/packages/jsonata-querying/src/index.ts +++ b/packages/jsonata-querying/src/index.ts @@ -1,132 +1,76 @@ -import jsonata from "jsonata" - -interface InterpolationBlock { - expression: string - startIndex: number - endIndex: number -} - -/** - * parses template string to find all {{ }} interpolation blocks - */ -function parseInterpolations(template: string): InterpolationBlock[] { - const blocks: InterpolationBlock[] = [] - let i = 0 - - while (i < template.length) { - // look for opening {{ - if (template[i] === "{" && template[i + 1] === "{") { - const startIndex = i - i += 2 // skip past {{ - - let braceDepth = 0 - let expression = "" - let foundClosing = false - - while (i < template.length) { - const char = template[i] - const nextChar = template[i + 1] - - // check for closing }} - if (char === "}" && nextChar === "}" && braceDepth === 0) { - foundClosing = true - blocks.push({ - expression: expression.trim(), - startIndex, - endIndex: i + 2, - }) - i += 2 // skip past }} - break - } - - if (char === "{") { - braceDepth++ - } else if (char === "}") { - braceDepth-- - } - - expression += char - i++ - } - - if (!foundClosing) { - throw new Error(`unclosed interpolation block starting at position ${startIndex}`) - } - } else { - i++ - } - } - - return blocks -} - -const determineMode = (template: string): "template" | "jsonata" => { - if (template.includes("{{")) { - return "template" - } - - return "jsonata" -} - -/** - * interpolates JSONata expressions in a template string - * - * @param template - template string with {{ $.expression }} placeholders or pure JSONata expression - * @param data - data to evaluate expressions against - * @param mode - "template" for {{ }} interpolation (always returns string), "jsonata" for pure JSONata (returns any type) - * @returns interpolated result (string for template mode, any JSON type for jsonata mode) - */ -export async function interpolate(template: string, data: unknown): Promise { - const mode = determineMode(template) - - // jsonata mode: evaluate entire input as pure JSONata expression - if (mode === "jsonata") { - const expression = jsonata(template) - const result = await expression.evaluate(data) - - if (result === undefined) { - throw new Error(`expression '${template}' returned undefined`) - } - - // jsonata sequences have a non-enumerable `sequence` property - // convert to plain array to avoid issues with deep equality checks - if (Array.isArray(result) && (result as any).sequence === true) { - return [...result] - } - - return result - } - - // template mode: parse {{ }} blocks and return string - const blocks = parseInterpolations(template) - - if (blocks.length === 0) { - return template - } - - let result = template - - // process blocks in reverse order to maintain correct indices for multiple interpolations - // otherwise wed have to offset the indices of all the blocks after the current one - for (let i = blocks.length - 1; i >= 0; i--) { - const block = blocks[i] - const expression = jsonata(block.expression) - const value = await expression.evaluate(data) - - if (value === undefined) { - throw new Error(`expression '${block.expression}' returned undefined`) - } - - // in template mode, we always convert values to strings - let stringValue: string - if (typeof value === "string") { - stringValue = value - } else { - stringValue = JSON.stringify(value) - } - - result = result.slice(0, block.startIndex) + stringValue + result.slice(block.endIndex) - } - - return result -} +// quata - jsonata to sql translation library +// main entry point + +// ast types (for advanced usage) +export type { + BinaryNode, + BindNode, + BlockNode, + ConditionNode, + ExprNode, + FilterStage, + FunctionNode, + NameNode, + NumberNode, + PathNode, + SortNode, + StringNode, + UnaryNode, + ValueNode, + VariableNode, +} from "./jsonata.overrides.js" +export type { + CompiledQuery, + Quata, + QuataOptions, + QuataSchema, + TableSchema, + TranslationContext, +} from "./quata.js" +export type { + FieldDefinition, + FieldNames, + FieldType, + RelationDefinition, + RelationType, + TableNames, +} from "./schema/types.js" +export type { ValidationError, ValidationResult } from "./subset-validator.js" +export type { BindingEntry, KyselyRef } from "./translator/context.js" +export type { TranslationResult } from "./translator/expression.js" + +// function mapping (for reference) +export { getFunctionMapping, isFunctionSupported } from "./function-mapping.js" +// node classification (for reference) +export { + BINARY_OPERATOR_CLASSIFICATION, + NODE_TYPE_CLASSIFICATION, + SupportTier, +} from "./node-classification.js" +// core api +export { createQuata, TranslationError } from "./quata.js" +// schema definition +export { + defineSchema, + defineTable, +} from "./schema/types.js" +// validation +export { + isFullySupported, + isValid, + validateExpression, +} from "./subset-validator.js" +// translation utilities (for advanced usage) +export { + addBinding, + createChildContext, + createContext, + generateAlias, + resolveBinding, + resolveField, + resolveTable, +} from "./translator/context.js" +export { + resultToSql, + translateExpression, +} from "./translator/expression.js" diff --git a/packages/jsonata-querying/src/quata.ts b/packages/jsonata-querying/src/quata.ts new file mode 100644 index 0000000000..f71082c330 --- /dev/null +++ b/packages/jsonata-querying/src/quata.ts @@ -0,0 +1,608 @@ +// quata - jsonata to sql translation library +// main factory and api + +import type { ExprNode, PathNode, SortNode } from "./jsonata.overrides.js" +import type { QuataSchema, TableSchema } from "./schema/types.js" + +import jsonata from "jsonata" +import { type Kysely, type RawBuilder, type SelectQueryBuilder, sql } from "kysely" + +import { normalizeSchema } from "./schema/types.js" +import { isValid, validateExpression } from "./subset-validator.js" +import { createContext, generateAlias, type TranslationContext } from "./translator/context.js" +import { resultToSql, TranslationError, translateExpression } from "./translator/expression.js" + +// options for creating a quata instance +export interface QuataOptions { + schema: TSchema + db: Kysely> +} + +// a compiled query ready for execution +export interface CompiledQuery { + // the generated sql query string + sql: string + // bound parameter values + parameters: unknown[] + // execute the query with optional parameters + execute: (params?: Record) => Promise + // get the kysely query builder (for further modification) + toQueryBuilder: () => SelectQueryBuilder, string, T> +} + +// the main quata instance +export interface Quata { + // compile a jsonata expression to sql + compile: (expression: string, params?: Record) => CompiledQuery + + // validate an expression without compiling + validate: (expression: string) => { valid: boolean; errors: string[] } + + // get the schema + schema: TSchema +} + +// create a new quata instance +// can be called with options object or with schema and db as separate args +export function createQuata( + schemaOrOptions: TSchema | QuataOptions, + maybeDb?: Kysely> +): Quata { + const { schema, db } = + maybeDb !== undefined + ? { schema: schemaOrOptions as TSchema, db: maybeDb } + : (schemaOrOptions as QuataOptions) + + // normalize the schema to apply defaults + const normalizedSchema = normalizeSchema(schema) + + return { + schema, + + validate(expression: string) { + const result = validateExpression(expression) + return { + valid: result.valid, + errors: result.errors.map((e) => e.message), + } + }, + + compile( + expression: string, + params?: Record + ): CompiledQuery { + // validate the expression first + if (!isValid(expression)) { + const validation = validateExpression(expression) + throw new Error( + `invalid expression: ${validation.errors.map((e) => e.message).join(", ")}` + ) + } + + // parse the expression to ast + const ast = jsonata(expression).ast() as ExprNode + + // create translation context + const ctx = createContext({ + schema: normalizedSchema, + parameters: params ?? {}, + db, + }) + + // translate the ast to a query + const query = buildQuery(ast, ctx) + + // compile to sql + const compiled = query.compile() + + return { + sql: compiled.sql, + parameters: compiled.parameters as unknown[], + execute: async (runtimeParams?: Record) => { + if (runtimeParams) { + // merge runtime params with compile-time params + const mergedParams = { ...params, ...runtimeParams } + const ctx2 = createContext({ + schema: normalizedSchema, + parameters: mergedParams, + db, + }) + const query2 = buildQuery(ast, ctx2) + const result = await query2.execute() + return result as T[] + } + const result = await query.execute() + return result as T[] + }, + toQueryBuilder: () => + query as SelectQueryBuilder, string, T>, + } + }, + } +} + +// build a kysely query from the ast +function buildQuery( + ast: ExprNode, + ctx: TranslationContext +): SelectQueryBuilder, string, unknown> { + // handle $$table expressions (variable node with predicate) + if (ast.type === "variable") { + const varNode = ast as unknown as { + value: string + predicate?: Array<{ type: string; expr?: ExprNode }> + } + + if (varNode.value.startsWith("$")) { + const tableName = varNode.value.slice(1) + const tableSchema = ctx.schema.tables[tableName] + if (!tableSchema) { + throw new TranslationError(`unknown table: ${tableName}`, ast, ctx) + } + + const tableAlias = generateAlias(ctx) + ctx.currentTable = tableName + ctx.currentTableAlias = tableAlias + + let query = ctx.db.selectFrom(`${tableSchema.table} as ${tableAlias}`) + query = query.selectAll() as typeof query + + // collect filter conditions first (to gather pending joins) + const filterConditions: RawBuilder[] = [] + let limitValue: number | undefined + let offsetValue: number | undefined + + // save original table context + const originalTable = ctx.currentTable + const originalAlias = ctx.currentTableAlias + + if (varNode.predicate) { + for (const pred of varNode.predicate) { + if (pred.type === "filter" && pred.expr) { + if (pred.expr.type === "number") { + // direct index access: [0] + const idx = (pred.expr as unknown as { value: number }).value + limitValue = 1 + if (idx > 0) { + offsetValue = idx + } + } else if (pred.expr.type === "unary") { + // check for range syntax: [[0..2]] + const unaryExpr = pred.expr as unknown as { + value: string + expressions?: ExprNode[] + } + if (unaryExpr.value === "[" && unaryExpr.expressions?.length === 1) { + const rangeExpr = unaryExpr.expressions[0] as unknown as { + type: string + value: string + lhs?: { value: number } + rhs?: { value: number } + } + if (rangeExpr.type === "binary" && rangeExpr.value === "..") { + const start = rangeExpr.lhs?.value ?? 0 + const end = rangeExpr.rhs?.value ?? 0 + limitValue = end - start + 1 + if (start > 0) { + offsetValue = start + } + } + } + } else { + // regular filter condition - translate it (may add pending joins) + // restore table context before each filter to ensure relation paths + // start from the base table + ctx.currentTable = originalTable + ctx.currentTableAlias = originalAlias + const result = translateExpression(pred.expr, ctx) + filterConditions.push(resultToSql(result, ctx)) + } + } + } + } + + // restore original table context after processing filters + ctx.currentTable = originalTable + ctx.currentTableAlias = originalAlias + + // apply pending joins (from relation traversal in filters) + for (const [, join] of ctx.pendingJoins) { + const targetTable = ctx.schema.tables[join.targetTableName] + if (!targetTable) continue + + query = ( + query as SelectQueryBuilder, string, unknown> + ).leftJoin( + `${targetTable.table} as ${join.targetAlias}` as never, + `${join.sourceAlias}.${join.relation.foreignKey}` as never, + `${join.targetAlias}.${join.relation.targetKey}` as never + ) as typeof query + } + + // apply filter conditions + for (const condition of filterConditions) { + query = query.where(condition as never) as typeof query + } + + // apply limit/offset + if (limitValue !== undefined) { + query = query.limit(limitValue) as typeof query + } + if (offsetValue !== undefined) { + query = query.offset(offsetValue) as typeof query + } + + return query as SelectQueryBuilder, string, unknown> + } + } + + // the root expression should be a path for most cases + if (ast.type !== "path") { + throw new TranslationError("query must start with a path expression", ast, ctx) + } + + const pathNode = ast as unknown as PathNode + + // find the table reference and build the query + const { tableName, tableAlias, whereConditions, orderBy, limit, offset, projection } = + analyzePathExpression(pathNode, ctx) + + if (!tableName) { + throw new TranslationError("could not determine table from expression", ast, ctx) + } + + const tableSchema = ctx.schema.tables[tableName] + if (!tableSchema) { + throw new TranslationError(`unknown table: ${tableName}`, ast, ctx) + } + + // update context with table info + ctx.currentTable = tableName + ctx.currentTableAlias = tableAlias + + // start building the query + let query = ctx.db.selectFrom( + tableAlias ? `${tableSchema.table} as ${tableAlias}` : tableSchema.table + ) + + // apply projection (SELECT clause) + if (projection) { + query = applyProjection(query, projection, ctx) as typeof query + } else { + query = query.selectAll() as typeof query + } + + // apply pending joins (from relation traversal) + for (const [, join] of ctx.pendingJoins) { + const targetTable = ctx.schema.tables[join.targetTableName] + if (!targetTable) continue + + query = (query as SelectQueryBuilder, string, unknown>).leftJoin( + `${targetTable.table} as ${join.targetAlias}` as never, + `${join.sourceAlias}.${join.relation.foreignKey}` as never, + `${join.targetAlias}.${join.relation.targetKey}` as never + ) as typeof query + } + + // apply WHERE conditions + for (const condition of whereConditions) { + query = query.where(condition as never) as typeof query + } + + // apply ORDER BY + for (const order of orderBy) { + query = query.orderBy(sql.ref(order.column), order.direction) as typeof query + } + + // apply LIMIT/OFFSET + if (limit !== undefined) { + query = query.limit(limit) as typeof query + } + if (offset !== undefined) { + query = query.offset(offset) as typeof query + } + + return query as SelectQueryBuilder, string, unknown> +} + +// analyze a path expression to extract query components +function analyzePathExpression( + pathNode: PathNode, + ctx: TranslationContext +): { + tableName: string | null + tableAlias: string | null + whereConditions: RawBuilder[] + orderBy: Array<{ column: string; direction: "asc" | "desc" }> + limit: number | undefined + offset: number | undefined + projection: Array<[string, ExprNode]> | null +} { + let tableName: string | null = null + let tableAlias: string | null = null + const whereConditions: RawBuilder[] = [] + const orderBy: Array<{ column: string; direction: "asc" | "desc" }> = [] + let limit: number | undefined + let offset: number | undefined + let projection: Array<[string, ExprNode]> | null = null + + const steps = pathNode.steps + + for (let i = 0; i < steps.length; i++) { + const step = steps[i] + + // check for $$ (root reference to table) + // in jsonata, $$tableName parses as variable "$tableName" + if (step.type === "variable") { + const varValue = (step as unknown as { value: string }).value + if (varValue.startsWith("$")) { + // $$tableName parses as "$tableName" + tableName = varValue.slice(1) + tableAlias = generateAlias(ctx) + + // check for predicate array (filters attached to the variable) + const varWithPredicate = step as unknown as { + predicate?: Array<{ type: string; expr?: ExprNode }> + } + if (varWithPredicate.predicate) { + // update context before processing filters + ctx.currentTable = tableName + ctx.currentTableAlias = tableAlias + + for (const pred of varWithPredicate.predicate) { + if (pred.type === "filter" && pred.expr) { + if (pred.expr.type === "number") { + const idx = (pred.expr as unknown as { value: number }).value + if (idx >= 0) { + limit = 1 + offset = idx + } + } else if (pred.expr.type === "unary") { + const unaryExpr = pred.expr as unknown as { + value: string + expressions?: ExprNode[] + } + if ( + unaryExpr.value === "[" && + unaryExpr.expressions?.length === 1 + ) { + const rangeExpr = unaryExpr.expressions[0] as unknown as { + type: string + value: string + lhs?: { value: number } + rhs?: { value: number } + } + if (rangeExpr.type === "binary" && rangeExpr.value === "..") { + const start = rangeExpr.lhs?.value ?? 0 + const end = rangeExpr.rhs?.value ?? 0 + limit = end - start + 1 + offset = start + } + } + } else { + // regular filter condition - restore context before each filter + ctx.currentTable = tableName + ctx.currentTableAlias = tableAlias + const conditionResult = translateExpression(pred.expr, ctx) + whereConditions.push(resultToSql(conditionResult, ctx)) + // restore context after filter (relation traversal may have changed it) + ctx.currentTable = tableName + ctx.currentTableAlias = tableAlias + } + } + } + } + } else if (varValue === "") { + // old pattern: $$ followed by name + const nextStep = steps[i + 1] + if (nextStep && nextStep.type === "name") { + tableName = (nextStep as unknown as { value: string }).value + tableAlias = generateAlias(ctx) + i++ + } + } + continue + } + + // check for name that could be a table reference (if we don't have one yet) + if (step.type === "name" && !tableName) { + const nameValue = (step as unknown as { value: string }).value + if (ctx.schema.tables[nameValue]) { + tableName = nameValue + tableAlias = generateAlias(ctx) + } + } + + // check for filter stages + const stepWithStages = step as unknown as { + stages?: Array<{ type: string; expr?: ExprNode }> + } + if (stepWithStages.stages) { + for (const stage of stepWithStages.stages) { + if (stage.type === "filter" && stage.expr) { + // check if it's an index (number) for LIMIT + if (stage.expr.type === "number") { + const idx = (stage.expr as unknown as { value: number }).value + if (idx >= 0) { + limit = 1 + offset = idx + } else { + // negative index - need ORDER BY DESC and LIMIT 1 + limit = 1 + // this would need default ordering which we'll handle later + } + } else if (stage.expr.type === "unary") { + // check for range expression [[0..9]] + const unaryExpr = stage.expr as unknown as { + value: string + expressions?: ExprNode[] + } + if (unaryExpr.value === "[" && unaryExpr.expressions?.length === 1) { + const rangeExpr = unaryExpr.expressions[0] as unknown as { + type: string + value: string + lhs?: { value: number } + rhs?: { value: number } + } + if (rangeExpr.type === "binary" && rangeExpr.value === "..") { + const start = rangeExpr.lhs?.value ?? 0 + const end = rangeExpr.rhs?.value ?? 0 + limit = end - start + 1 // inclusive range + offset = start + } + } + } else { + // regular filter condition - set up context and translate + const filterCtx = { + ...ctx, + currentTable: tableName, + currentTableAlias: tableAlias, + } + const conditionResult = translateExpression(stage.expr, filterCtx) + whereConditions.push(resultToSql(conditionResult, filterCtx)) + } + } + } + } + + // check for sort expression + if (step.type === "sort") { + // ensure context is set to main table for sort expressions + if (tableName && tableAlias) { + ctx.currentTable = tableName + ctx.currentTableAlias = tableAlias + } + const sortNode = step as unknown as SortNode + for (const term of sortNode.terms) { + const exprResult = translateExpression(term.expression, ctx) + if (exprResult.type === "reference") { + orderBy.push({ + column: exprResult.tableAlias + ? `${exprResult.tableAlias}.${exprResult.column}` + : exprResult.column, + direction: term.descending ? "desc" : "asc", + }) + } + } + + // check for filter stages on the sort node (for limit after sort) + const sortWithStages = step as unknown as { + stages?: Array<{ type: string; expr?: ExprNode }> + } + if (sortWithStages.stages) { + for (const stage of sortWithStages.stages) { + if (stage.type === "filter" && stage.expr) { + if (stage.expr.type === "number") { + const idx = (stage.expr as unknown as { value: number }).value + limit = 1 + offset = idx >= 0 ? idx : undefined + } + } + } + } + } + + // check for object constructor (projection) + if (step.type === "unary") { + const unaryNode = step as unknown as { + value: string + lhs?: Array<[ExprNode, ExprNode]> + } + if (unaryNode.value === "{" && unaryNode.lhs) { + projection = unaryNode.lhs.map(([keyNode, valueNode]) => { + const key = + keyNode.type === "string" + ? ((keyNode as unknown as { value: string }).value as string) + : String((keyNode as unknown as { value: unknown }).value) + return [key, valueNode] as [string, ExprNode] + }) + } + } + + // check for block expression (variable binding in projection context) + if (step.type === "block") { + const blockNode = step as unknown as { expressions: ExprNode[] } + // find the projection in the block (last expression should be an object) + for (const expr of blockNode.expressions) { + if (expr.type === "bind") { + // handle variable binding ($this := $) + const bindNode = expr as unknown as { + lhs: { value: string } + rhs: ExprNode + } + const varName = bindNode.lhs.value + if (bindNode.rhs.type === "variable") { + const rhsVar = (bindNode.rhs as unknown as { value: string }).value + if (rhsVar === "") { + // $this := $ - bind current context + ctx.bindings.set(varName, { + ref: sql.ref(tableAlias ?? tableName ?? ""), + tableAlias: tableAlias ?? undefined, + }) + } + } + } else if (expr.type === "unary") { + const unaryNode = expr as unknown as { + value: string + lhs?: Array<[ExprNode, ExprNode]> + } + if (unaryNode.value === "{" && unaryNode.lhs) { + projection = unaryNode.lhs.map(([keyNode, valueNode]) => { + const key = + keyNode.type === "string" + ? ((keyNode as unknown as { value: string }).value as string) + : String((keyNode as unknown as { value: unknown }).value) + return [key, valueNode] as [string, ExprNode] + }) + } + } + } + } + } + + return { tableName, tableAlias, whereConditions, orderBy, limit, offset, projection } +} + +// apply projection to the query +function applyProjection( + query: SelectQueryBuilder, string, unknown>, + projection: Array<[string, ExprNode]>, + ctx: TranslationContext +): SelectQueryBuilder, string, unknown> { + const selections: Array> = [] + + // save original table context - need to restore before each projection field + // since relation traversal modifies the context + const originalTable = ctx.currentTable + const originalAlias = ctx.currentTableAlias + + for (const [alias, valueExpr] of projection) { + // restore context before each projection field so relation lookups + // start from the main table + ctx.currentTable = originalTable + ctx.currentTableAlias = originalAlias + + const result = translateExpression(valueExpr, ctx) + const sqlExpr = resultToSql(result, ctx) + + // compile the expression and create a raw selection with alias + const compiled = sqlExpr.compile(ctx.db) + selections.push(sql.raw(`${compiled.sql} as "${alias}"`)) + } + + // restore context after all projections + ctx.currentTable = originalTable + ctx.currentTableAlias = originalAlias + + // apply all selections + let q = query + for (const selection of selections) { + q = q.select(selection as never) as typeof query + } + + return q +} + +// re-export types and utilities +export { TranslationError } +export type { QuataSchema, TableSchema, TranslationContext } diff --git a/packages/jsonata-querying/src/schema/types.ts b/packages/jsonata-querying/src/schema/types.ts new file mode 100644 index 0000000000..fd5036a6c4 --- /dev/null +++ b/packages/jsonata-querying/src/schema/types.ts @@ -0,0 +1,144 @@ +// schema definition types for quata +// consumers define their data model using these interfaces + +export type FieldType = "string" | "number" | "boolean" | "date" | "jsonb" | "array" + +// simplified field definition - just type and optionally nullable +// column name defaults to the field key +export interface FieldDefinition { + // the actual sql column name (defaults to the field key) + column?: string + type: FieldType + // for nested jsonb access, eg data.nested.field -> data->'nested'->>'field' + jsonbPath?: string[] + // whether this field is nullable + nullable?: boolean +} + +// normalized internal representation with required column +export interface NormalizedFieldDefinition { + column: string + type: FieldType + jsonbPath?: string[] + nullable?: boolean +} + +export type RelationType = "one-to-one" | "one-to-many" | "many-to-one" + +export interface RelationDefinition { + // the target table name (as defined in QuataSchema.tables) + target: string + // the foreign key column on the source table + foreignKey: string + // the target key column on the target table (defaults to 'id') + targetKey?: string + // the type of relation determines how joins/subqueries are generated + type: RelationType +} + +// normalized internal representation +export interface NormalizedRelationDefinition { + target: string + foreignKey: string + targetKey: string + type: RelationType +} + +export interface TableSchema { + // the actual sql table name (defaults to the table key) + table?: string + // field definitions mapping jsonata field names to sql columns + fields: Record + // optional relation definitions for joins + relations?: Record + // optional default ordering column for negative indexing + defaultOrderColumn?: string +} + +// normalized table schema +export interface NormalizedTableSchema { + table: string + fields: Record + relations: Record + defaultOrderColumn?: string +} + +export interface QuataSchema { + // table definitions mapping jsonata table references to sql tables + tables: Record +} + +// normalized schema +export interface NormalizedQuataSchema { + tables: Record +} + +// helper type to extract table names from a schema +export type TableNames = keyof T["tables"] & string + +// helper type to extract field names from a table +export type FieldNames< + T extends QuataSchema, + TTable extends TableNames, +> = keyof T["tables"][TTable]["fields"] & string + +// helper to create a typed schema +export function defineSchema(schema: T): T { + return schema +} + +// helper to create a typed table schema +export function defineTable(table: T): T { + return table +} + +// normalize a field definition by applying defaults +function normalizeField(fieldKey: string, field: FieldDefinition): NormalizedFieldDefinition { + return { + column: field.column ?? fieldKey, + type: field.type, + jsonbPath: field.jsonbPath, + nullable: field.nullable, + } +} + +// normalize a relation definition by applying defaults +function normalizeRelation(relation: RelationDefinition): NormalizedRelationDefinition { + return { + target: relation.target, + foreignKey: relation.foreignKey, + targetKey: relation.targetKey ?? "id", + type: relation.type, + } +} + +// normalize a table schema by applying defaults +function normalizeTable(tableKey: string, table: TableSchema): NormalizedTableSchema { + const fields: Record = {} + for (const [fieldKey, field] of Object.entries(table.fields)) { + fields[fieldKey] = normalizeField(fieldKey, field) + } + + const relations: Record = {} + if (table.relations) { + for (const [relKey, rel] of Object.entries(table.relations)) { + relations[relKey] = normalizeRelation(rel) + } + } + + return { + table: table.table ?? tableKey, + fields, + relations, + defaultOrderColumn: table.defaultOrderColumn, + } +} + +// normalize a full schema by applying defaults +export function normalizeSchema(schema: QuataSchema): NormalizedQuataSchema { + const tables: Record = {} + for (const [tableKey, table] of Object.entries(schema.tables)) { + tables[tableKey] = normalizeTable(tableKey, table) + } + return { tables } +} diff --git a/packages/jsonata-querying/src/translator/context.ts b/packages/jsonata-querying/src/translator/context.ts new file mode 100644 index 0000000000..9734f3e068 --- /dev/null +++ b/packages/jsonata-querying/src/translator/context.ts @@ -0,0 +1,209 @@ +// translation context tracks state during ast traversal + +import type { Expression, Kysely, RawBuilder } from "kysely" +import type { + NormalizedQuataSchema, + NormalizedRelationDefinition, + NormalizedTableSchema, +} from "../schema/types.js" + +// represents a reference that can be used in kysely expressions +export type KyselyRef = Expression | RawBuilder | string + +// binding entry for variable references like $varName +export interface BindingEntry { + // the kysely expression or reference + ref: KyselyRef + // the table alias if this binding represents a table context + tableAlias?: string + // the table schema if known + tableSchema?: NormalizedTableSchema +} + +// a pending join that needs to be added to the query +export interface PendingJoin { + // the relation being joined + relation: NormalizedRelationDefinition + // the source table alias + sourceAlias: string + // the target table alias + targetAlias: string + // the target table name (schema key) + targetTableName: string +} + +export interface TranslationContext { + // the normalized schema definition + schema: NormalizedQuataSchema + + // the current table being queried (null if not yet established) + currentTable: string | null + + // the current table alias (for correlated subqueries) + currentTableAlias: string | null + + // variable bindings ($varName -> expression) + bindings: Map + + // query parameters ($input values) + parameters: Record + + // nesting depth for subqueries + depth: number + + // parent context for correlated subquery references ($this) + parentContext: TranslationContext | null + + // unique alias counter for generating table aliases + aliasCounter: number + + // the kysely database instance + db: Kysely> + + // joins that need to be applied to the query + // key is the relation path (e.g., "author" or "author.company") + pendingJoins: Map +} + +// create a new root translation context +export function createContext(options: { + schema: NormalizedQuataSchema + parameters?: Record + db: Kysely> +}): TranslationContext { + return { + schema: options.schema, + currentTable: null, + currentTableAlias: null, + bindings: new Map(), + parameters: options.parameters ?? {}, + depth: 0, + parentContext: null, + aliasCounter: 0, + db: options.db, + pendingJoins: new Map(), + } +} + +// create a child context for nested queries +export function createChildContext( + parent: TranslationContext, + overrides?: Partial +): TranslationContext { + return { + ...parent, + bindings: new Map(parent.bindings), + depth: parent.depth + 1, + parentContext: parent, + aliasCounter: parent.aliasCounter, + pendingJoins: new Map(parent.pendingJoins), + ...overrides, + } +} + +// generate a unique table alias +export function generateAlias(ctx: TranslationContext): string { + const alias = `t${ctx.aliasCounter}` + ctx.aliasCounter++ + return alias +} + +// resolve a table name from the schema +export function resolveTable( + ctx: TranslationContext, + tableName: string +): NormalizedTableSchema | null { + return ctx.schema.tables[tableName] ?? null +} + +// resolve a field from the current table +export function resolveField( + ctx: TranslationContext, + fieldName: string +): { column: string; tableAlias: string | null } | null { + if (!ctx.currentTable) { + return null + } + + const tableSchema = resolveTable(ctx, ctx.currentTable) + if (!tableSchema) { + return null + } + + const field = tableSchema.fields[fieldName] + if (!field) { + return null + } + + return { + column: field.column, + tableAlias: ctx.currentTableAlias, + } +} + +// resolve a variable binding +export function resolveBinding(ctx: TranslationContext, varName: string): BindingEntry | null { + // check current context first + const binding = ctx.bindings.get(varName) + if (binding) { + return binding + } + + // check parent contexts + if (ctx.parentContext) { + return resolveBinding(ctx.parentContext, varName) + } + + return null +} + +// add a variable binding to the context +export function addBinding(ctx: TranslationContext, varName: string, entry: BindingEntry): void { + ctx.bindings.set(varName, entry) +} + +// resolve a relation from the current table and register a pending join +export function resolveRelation( + ctx: TranslationContext, + relationName: string +): { targetTableName: string; targetAlias: string } | null { + if (!ctx.currentTable || !ctx.currentTableAlias) { + return null + } + + const tableSchema = resolveTable(ctx, ctx.currentTable) + if (!tableSchema) { + return null + } + + const relation = tableSchema.relations[relationName] + if (!relation) { + return null + } + + // check if we already have this join + const joinKey = `${ctx.currentTableAlias}.${relationName}` + const existingJoin = ctx.pendingJoins.get(joinKey) + if (existingJoin) { + return { + targetTableName: existingJoin.targetTableName, + targetAlias: existingJoin.targetAlias, + } + } + + // create a new join + const targetAlias = generateAlias(ctx) + const pendingJoin: PendingJoin = { + relation, + sourceAlias: ctx.currentTableAlias, + targetAlias, + targetTableName: relation.target, + } + + ctx.pendingJoins.set(joinKey, pendingJoin) + + return { + targetTableName: relation.target, + targetAlias, + } +} diff --git a/packages/jsonata-querying/src/translator/expression.ts b/packages/jsonata-querying/src/translator/expression.ts new file mode 100644 index 0000000000..5fa472bf36 --- /dev/null +++ b/packages/jsonata-querying/src/translator/expression.ts @@ -0,0 +1,857 @@ +// main expression translator - converts jsonata ast nodes to kysely expressions + +import type { ExprNode, PathNode } from "../jsonata.overrides.js" +import type { TranslationContext } from "./context.js" + +import { type Expression, type RawBuilder, type SelectQueryBuilder, sql } from "kysely" + +import { resolveRelation } from "./context.js" +import { + buildJsonArraySubquery, + buildNestedQuery, + buildScalarSubquery, + isNestedQuery, +} from "./nested.js" + +// the result of translating an expression can be different types +// depending on what kind of node was translated +export type TranslationResult = + | { type: "expression"; value: Expression | RawBuilder } + | { type: "query"; value: SelectQueryBuilder, string, unknown> } + | { type: "literal"; value: string | number | boolean | null } + | { type: "reference"; column: string; tableAlias: string | null } + +export class TranslationError extends Error { + constructor( + message: string, + public node: ExprNode, + public context?: TranslationContext + ) { + super(message) + this.name = "TranslationError" + } +} + +// main entry point for translating an expression node +export function translateExpression(node: ExprNode, ctx: TranslationContext): TranslationResult { + switch (node.type) { + case "string": + return translateString(node, ctx) + case "number": + return translateNumber(node, ctx) + case "value": + return translateValue(node, ctx) + case "name": + return translateName(node, ctx) + case "variable": + return translateVariable(node, ctx) + case "binary": + return translateBinary(node, ctx) + case "path": + return translatePath(node, ctx) + case "unary": + return translateUnary(node, ctx) + case "function": + return translateFunction(node, ctx) + case "condition": + return translateCondition(node, ctx) + case "block": + return translateBlock(node, ctx) + case "bind": + return translateBind(node, ctx) + case "sort": + return translateSort(node, ctx) + default: + throw new TranslationError( + `unsupported node type: ${(node as ExprNode).type}`, + node, + ctx + ) + } +} + +// translate a string literal +function translateString( + node: ExprNode & { type: "string" }, + _ctx: TranslationContext +): TranslationResult { + return { type: "literal", value: node.value as string } +} + +// translate a number literal +function translateNumber( + node: ExprNode & { type: "number" }, + _ctx: TranslationContext +): TranslationResult { + return { type: "literal", value: node.value as number } +} + +// translate a value literal (boolean, null) +function translateValue( + node: ExprNode & { type: "value" }, + _ctx: TranslationContext +): TranslationResult { + return { type: "literal", value: node.value as boolean | null } +} + +// translate a name (field reference or relation) +// note: this may temporarily modify ctx.currentTable/currentTableAlias for relation traversal +// the caller should save and restore context if needed for subsequent expressions +function translateName( + node: ExprNode & { type: "name" }, + ctx: TranslationContext +): TranslationResult { + const fieldName = node.value as string + + // if we have a current table context, first check for relations + if (ctx.currentTable) { + const tableSchema = ctx.schema.tables[ctx.currentTable] + if (tableSchema) { + // check if this is a relation + const relation = tableSchema.relations[fieldName] + if (relation) { + // resolve the relation and register a pending join + const resolved = resolveRelation(ctx, fieldName) + if (resolved) { + // update the context to point to the target table temporarily + // this allows subsequent field access in the same path to resolve correctly + ctx.currentTable = resolved.targetTableName + ctx.currentTableAlias = resolved.targetAlias + + // return a placeholder that indicates we've traversed to a relation + // the next step in the path will resolve fields from the target table + return { + type: "reference", + column: "*", + tableAlias: resolved.targetAlias, + } + } + } + + // check for field + const field = tableSchema.fields[fieldName] + if (field) { + return { + type: "reference", + column: field.column, + tableAlias: ctx.currentTableAlias, + } + } + } + } + + // fall back to using the field name as-is + return { + type: "reference", + column: fieldName, + tableAlias: ctx.currentTableAlias, + } +} + +// translate a variable reference ($varName, $$, $input) +function translateVariable( + node: ExprNode & { type: "variable" }, + ctx: TranslationContext +): TranslationResult { + const varName = node.value as string + + // $$tableName parses as "$tableName" - this is a table reference + if (varName.startsWith("$")) { + const tableName = varName.slice(1) + const tableSchema = ctx.schema.tables[tableName] + if (tableSchema) { + // this is a reference to a table for nested queries + // return a placeholder that will be expanded + return { + type: "reference", + column: "*", + tableAlias: tableName, + } + } + } + + // empty string is $$ (just the prefix) + if (varName === "") { + // inside a projection, $ refers to the current item + const binding = ctx.bindings.get("") + if (binding) { + return { + type: "expression", + value: binding.ref as Expression, + } + } + // in the context of current table + if (ctx.currentTableAlias) { + return { + type: "reference", + column: "*", + tableAlias: ctx.currentTableAlias, + } + } + throw new TranslationError("$ reference without context", node, ctx) + } + + // $input refers to query parameters + if (varName === "input") { + // this will be resolved when accessing properties + return { + type: "literal", + value: null, // placeholder, actual value resolved in path + } + } + + // check for variable binding + const binding = ctx.bindings.get(varName) + if (binding) { + return { + type: "expression", + value: binding.ref as Expression, + } + } + + throw new TranslationError(`unresolved variable: $${varName}`, node, ctx) +} + +// translate a binary expression +function translateBinary( + node: ExprNode & { type: "binary" }, + ctx: TranslationContext +): TranslationResult { + const binaryNode = node as unknown as { + type: "binary" + value: string + lhs: ExprNode + rhs: ExprNode + } + + const left = translateExpression(binaryNode.lhs, ctx) + const right = translateExpression(binaryNode.rhs, ctx) + + const leftSql = resultToSql(left, ctx) + const rightSql = resultToSql(right, ctx) + + const op = binaryNode.value + + // map jsonata operators to sql + switch (op) { + // comparison + case "=": + return { type: "expression", value: sql`${leftSql} = ${rightSql}` } + case "!=": + return { type: "expression", value: sql`${leftSql} != ${rightSql}` } + case "<": + return { type: "expression", value: sql`${leftSql} < ${rightSql}` } + case "<=": + return { type: "expression", value: sql`${leftSql} <= ${rightSql}` } + case ">": + return { type: "expression", value: sql`${leftSql} > ${rightSql}` } + case ">=": + return { type: "expression", value: sql`${leftSql} >= ${rightSql}` } + + // arithmetic + case "+": + return { type: "expression", value: sql`${leftSql} + ${rightSql}` } + case "-": + return { type: "expression", value: sql`${leftSql} - ${rightSql}` } + case "*": + return { type: "expression", value: sql`${leftSql} * ${rightSql}` } + case "/": + return { type: "expression", value: sql`${leftSql} / ${rightSql}` } + case "%": + return { type: "expression", value: sql`${leftSql} % ${rightSql}` } + + // boolean + case "and": + return { type: "expression", value: sql`${leftSql} AND ${rightSql}` } + case "or": + return { type: "expression", value: sql`${leftSql} OR ${rightSql}` } + + // string concatenation + case "&": + return { type: "expression", value: sql`${leftSql} || ${rightSql}` } + + // range operator (for array slicing) + case "..": + // this is handled specially in limit translation + return { + type: "expression", + value: sql`(${leftSql}, ${rightSql})`, // placeholder tuple + } + + // membership test + case "in": + return { type: "expression", value: sql`${leftSql} = ANY(${rightSql})` } + + default: + throw new TranslationError(`unsupported operator: ${op}`, node, ctx) + } +} + +// translate a path expression (the core query structure) +function translatePath( + node: ExprNode & { type: "path" }, + ctx: TranslationContext +): TranslationResult { + const pathNode = node as unknown as PathNode + + if (!pathNode.steps || pathNode.steps.length === 0) { + throw new TranslationError("empty path expression", node, ctx) + } + + // check if this is a nested query (starts with $$) + if (isNestedQuery(node)) { + // if we're in a projection context (depth > 0), this becomes a correlated subquery + if (ctx.depth > 0 || ctx.parentContext) { + return { + type: "expression", + value: buildJsonArraySubquery(pathNode, ctx), + } + } + // otherwise, build as a regular nested query + return buildNestedQuery(pathNode, ctx) + } + + // process steps sequentially, building up the query + let result: TranslationResult | null = null + let currentCtx = ctx + + for (const step of pathNode.steps) { + result = translatePathStep(step, currentCtx, result) + // update context based on the step result + currentCtx = updateContextFromStep(currentCtx, step, result) + } + + return result! +} + +// translate a single path step +function translatePathStep( + step: ExprNode, + ctx: TranslationContext, + previous: TranslationResult | null +): TranslationResult { + // handle the step based on its type + const result = translateExpression(step, ctx) + + // check for stages (filter, sort, etc.) attached to the step + const stepWithStages = step as unknown as { + stages?: Array<{ type: string; expr?: ExprNode }> + } + + if (stepWithStages.stages && stepWithStages.stages.length > 0) { + return applyStages(result, stepWithStages.stages, ctx) + } + + return result +} + +// apply stages (filter, index) to a result +function applyStages( + result: TranslationResult, + stages: Array<{ type: string; expr?: ExprNode }>, + ctx: TranslationContext +): TranslationResult { + let current = result + + for (const stage of stages) { + if (stage.type === "filter" && stage.expr) { + current = applyFilter(current, stage.expr, ctx) + } + // sort and index stages will be handled in later stages + } + + return current +} + +// apply a filter predicate +function applyFilter( + result: TranslationResult, + filterExpr: ExprNode, + ctx: TranslationContext +): TranslationResult { + // check if filter is a numeric index (for LIMIT 1) + if (filterExpr.type === "number") { + // index access - will be handled in limit translation + return result + } + + // translate the filter condition + const condition = translateExpression(filterExpr, ctx) + const conditionSql = resultToSql(condition, ctx) + + // for now, return the condition as an expression + // the actual WHERE clause application happens when building the query + return { + type: "expression", + value: conditionSql, + } +} + +// update context after processing a path step +function updateContextFromStep( + ctx: TranslationContext, + step: ExprNode, + _result: TranslationResult +): TranslationContext { + // if the step is a variable referencing a table, update the context + if (step.type === "variable") { + const varName = (step as unknown as { value: string }).value + if (varName === "$") { + // $$ prefix indicates table reference + // the actual table name comes from the next step + return ctx + } + } + + // if the step is a name and we're after $$, it's a table reference + if (step.type === "name") { + const tableName = (step as unknown as { value: string }).value + const tableSchema = ctx.schema.tables[tableName] + if (tableSchema) { + return { + ...ctx, + currentTable: tableName, + currentTableAlias: null, + } + } + } + + return ctx +} + +// translate a unary expression (negation, array/object constructors) +function translateUnary( + node: ExprNode & { type: "unary" }, + ctx: TranslationContext +): TranslationResult { + const unaryNode = node as unknown as { + type: "unary" + value: string + expression?: ExprNode + lhs?: Array<[ExprNode, ExprNode]> + expressions?: ExprNode[] + } + + switch (unaryNode.value) { + case "-": + // negation + if (unaryNode.expression) { + const inner = translateExpression(unaryNode.expression, ctx) + const innerSql = resultToSql(inner, ctx) + return { type: "expression", value: sql`-${innerSql}` } + } + break + + case "{": + // object constructor - projection + return translateObjectConstructor(unaryNode.lhs ?? [], ctx) + + case "[": + // array constructor + return translateArrayConstructor(unaryNode.expressions ?? [], ctx) + } + + throw new TranslationError(`unsupported unary: ${unaryNode.value}`, node, ctx) +} + +// translate object constructor (projection) +function translateObjectConstructor( + pairs: Array<[ExprNode, ExprNode]>, + ctx: TranslationContext +): TranslationResult { + // this will be handled more fully in the projection stage + // for now, build json_build_object + const args: RawBuilder[] = [] + + for (const [keyNode, valueNode] of pairs) { + const key = translateExpression(keyNode, ctx) + const value = translateExpression(valueNode, ctx) + + if (key.type !== "literal" || typeof key.value !== "string") { + throw new TranslationError("object keys must be string literals", keyNode, ctx) + } + + args.push(sql.lit(key.value)) + args.push(resultToSql(value, ctx)) + } + + if (args.length === 0) { + return { type: "expression", value: sql`'{}'::jsonb` } + } + + // build json_build_object call + const argsSql = sql.join(args, sql`, `) + return { type: "expression", value: sql`json_build_object(${argsSql})` } +} + +// translate array constructor +function translateArrayConstructor( + elements: ExprNode[], + ctx: TranslationContext +): TranslationResult { + if (elements.length === 0) { + return { type: "expression", value: sql`ARRAY[]::jsonb[]` } + } + + const translatedElements = elements.map((el) => { + const result = translateExpression(el, ctx) + return resultToSql(result, ctx) + }) + + const elementsSql = sql.join(translatedElements, sql`, `) + return { type: "expression", value: sql`ARRAY[${elementsSql}]` } +} + +// translate a function call +function translateFunction( + node: ExprNode & { type: "function" }, + ctx: TranslationContext +): TranslationResult { + const funcNode = node as unknown as { + type: "function" + procedure: { type: string; value: string } + arguments: ExprNode[] + } + + const funcName = funcNode.procedure.value + + // check if this is an aggregate function with a nested path argument + const aggregateFuncs = ["sum", "count", "average", "min", "max"] + if (aggregateFuncs.includes(funcName)) { + // check if argument contains a path that starts with $$ + if (funcNode.arguments.length > 0) { + const arg = funcNode.arguments[0] + if (arg.type === "path" && isNestedQuery(arg)) { + // build a scalar subquery for this aggregate + return { + type: "expression", + value: buildScalarSubquery(node, ctx), + } + } + } + } + + const args = funcNode.arguments.map((arg) => translateExpression(arg, ctx)) + + return translateFunctionCall(funcName, args, ctx, node) +} + +// translate a specific function call +function translateFunctionCall( + funcName: string, + args: TranslationResult[], + ctx: TranslationContext, + node: ExprNode +): TranslationResult { + // map jsonata functions to postgres functions + switch (funcName) { + // string functions + case "lowercase": + return singleArgFunc("LOWER", args, ctx) + case "uppercase": + return singleArgFunc("UPPER", args, ctx) + case "trim": + return singleArgFunc("TRIM", args, ctx) + case "length": + return singleArgFunc("LENGTH", args, ctx) + + // numeric functions + case "floor": + return singleArgFunc("FLOOR", args, ctx) + case "ceil": + return singleArgFunc("CEIL", args, ctx) + case "abs": + return singleArgFunc("ABS", args, ctx) + case "sqrt": + return singleArgFunc("SQRT", args, ctx) + case "round": + return multiArgFunc("ROUND", args, ctx) + case "power": + return multiArgFunc("POWER", args, ctx) + + // aggregate functions + case "sum": + return singleArgFunc("SUM", args, ctx) + case "count": + return countFunc(args, ctx) + case "average": + return singleArgFunc("AVG", args, ctx) + case "min": + return singleArgFunc("MIN", args, ctx) + case "max": + return singleArgFunc("MAX", args, ctx) + + // existence check + case "exists": { + const existsArg = args[0] + const existsSql = resultToSql(existsArg, ctx) + return { type: "expression", value: sql`${existsSql} IS NOT NULL` } + } + + // type conversion + case "string": { + const stringArg = args[0] + const stringSql = resultToSql(stringArg, ctx) + return { type: "expression", value: sql`CAST(${stringSql} AS TEXT)` } + } + + case "number": { + const numberArg = args[0] + const numberSql = resultToSql(numberArg, ctx) + return { type: "expression", value: sql`CAST(${numberSql} AS NUMERIC)` } + } + + // string manipulation + case "substring": + return substringFunc(args, ctx) + + case "contains": + return containsFunc(args, ctx) + + case "split": + return splitFunc(args, ctx) + + case "join": + return joinFunc(args, ctx) + + case "replace": + return replaceFunc(args, ctx) + + // boolean + case "not": { + const notArg = args[0] + const notSql = resultToSql(notArg, ctx) + return { type: "expression", value: sql`NOT ${notSql}` } + } + + default: + throw new TranslationError(`unsupported function: $${funcName}`, node, ctx) + } +} + +// helper for single-argument functions +function singleArgFunc( + sqlFunc: string, + args: TranslationResult[], + ctx: TranslationContext +): TranslationResult { + if (args.length < 1) { + throw new Error(`${sqlFunc} requires at least 1 argument`) + } + const argSql = resultToSql(args[0], ctx) + return { type: "expression", value: sql.raw(`${sqlFunc}(${argSql.compile(ctx.db).sql})`) } +} + +// helper for multi-argument functions +function multiArgFunc( + sqlFunc: string, + args: TranslationResult[], + ctx: TranslationContext +): TranslationResult { + const argsSql = args.map((a) => resultToSql(a, ctx)) + const joined = sql.join(argsSql, sql`, `) + return { type: "expression", value: sql.raw(`${sqlFunc}(${joined.compile(ctx.db).sql})`) } +} + +// count function - handles count(items) vs count(*) +function countFunc(args: TranslationResult[], ctx: TranslationContext): TranslationResult { + if (args.length === 0) { + return { type: "expression", value: sql`COUNT(*)` } + } + const argSql = resultToSql(args[0], ctx) + return { type: "expression", value: sql`COUNT(${argSql})` } +} + +// substring function - adjusts for 0-based to 1-based indexing +function substringFunc(args: TranslationResult[], ctx: TranslationContext): TranslationResult { + const strSql = resultToSql(args[0], ctx) + const startSql = resultToSql(args[1], ctx) + + if (args.length >= 3) { + const lenSql = resultToSql(args[2], ctx) + return { + type: "expression", + value: sql`SUBSTRING(${strSql} FROM ${startSql} + 1 FOR ${lenSql})`, + } + } + + return { + type: "expression", + value: sql`SUBSTRING(${strSql} FROM ${startSql} + 1)`, + } +} + +// contains function +function containsFunc(args: TranslationResult[], ctx: TranslationContext): TranslationResult { + const strSql = resultToSql(args[0], ctx) + const patternSql = resultToSql(args[1], ctx) + return { + type: "expression", + value: sql`POSITION(${patternSql} IN ${strSql}) > 0`, + } +} + +// split function +function splitFunc(args: TranslationResult[], ctx: TranslationContext): TranslationResult { + const strSql = resultToSql(args[0], ctx) + const delimSql = resultToSql(args[1], ctx) + return { + type: "expression", + value: sql`STRING_TO_ARRAY(${strSql}, ${delimSql})`, + } +} + +// join function +function joinFunc(args: TranslationResult[], ctx: TranslationContext): TranslationResult { + const arrSql = resultToSql(args[0], ctx) + const sepSql = args.length > 1 ? resultToSql(args[1], ctx) : sql.lit("") + return { + type: "expression", + value: sql`ARRAY_TO_STRING(${arrSql}, ${sepSql})`, + } +} + +// replace function +function replaceFunc(args: TranslationResult[], ctx: TranslationContext): TranslationResult { + const strSql = resultToSql(args[0], ctx) + const fromSql = resultToSql(args[1], ctx) + const toSql = resultToSql(args[2], ctx) + return { + type: "expression", + value: sql`REPLACE(${strSql}, ${fromSql}, ${toSql})`, + } +} + +// translate a conditional expression +function translateCondition( + node: ExprNode & { type: "condition" }, + ctx: TranslationContext +): TranslationResult { + const condNode = node as unknown as { + type: "condition" + condition: ExprNode + then: ExprNode + else: ExprNode + } + + const condition = translateExpression(condNode.condition, ctx) + const thenBranch = translateExpression(condNode.then, ctx) + const elseBranch = translateExpression(condNode.else, ctx) + + const condSql = resultToSql(condition, ctx) + const thenSql = resultToSql(thenBranch, ctx) + const elseSql = resultToSql(elseBranch, ctx) + + return { + type: "expression", + value: sql`CASE WHEN ${condSql} THEN ${thenSql} ELSE ${elseSql} END`, + } +} + +// translate a block expression (variable bindings) +function translateBlock( + node: ExprNode & { type: "block" }, + ctx: TranslationContext +): TranslationResult { + const blockNode = node as unknown as { + type: "block" + expressions: ExprNode[] + } + + // process expressions sequentially + // bind expressions update the context + // the last expression is the result + let result: TranslationResult | null = null + let currentCtx = ctx + + for (const expr of blockNode.expressions) { + if (expr.type === "bind") { + // process binding and update context + const bindResult = translateExpression(expr, currentCtx) + currentCtx = bindResult as unknown as TranslationContext + } else { + result = translateExpression(expr, currentCtx) + } + } + + if (!result) { + throw new TranslationError("empty block expression", node, ctx) + } + + return result +} + +// translate a bind expression ($x := expr) +function translateBind( + node: ExprNode & { type: "bind" }, + ctx: TranslationContext +): TranslationResult { + const bindNode = node as unknown as { + type: "bind" + lhs: { type: "variable"; value: string } + rhs: ExprNode + } + + const varName = bindNode.lhs.value + const valueResult = translateExpression(bindNode.rhs, ctx) + + // add binding to context + ctx.bindings.set(varName, { + ref: resultToSql(valueResult, ctx), + }) + + // return a placeholder - the actual result is the context update + return { type: "literal", value: null } +} + +// translate a sort expression +function translateSort( + node: ExprNode & { type: "sort" }, + ctx: TranslationContext +): TranslationResult { + // sort is handled as a modifier to the query, not a standalone expression + // for now, return a placeholder + const sortNode = node as unknown as { + type: "sort" + terms: Array<{ descending: boolean; expression: ExprNode }> + } + + // translate the sort terms (for later use in query building) + const _terms = sortNode.terms.map((term) => ({ + descending: term.descending, + expr: translateExpression(term.expression, ctx), + })) + + // placeholder - actual ORDER BY applied in query builder + return { type: "literal", value: null } +} + +// convert a translation result to a sql expression +export function resultToSql( + result: TranslationResult, + ctx: TranslationContext +): RawBuilder { + switch (result.type) { + case "literal": + if (result.value === null) { + return sql`NULL` + } + return sql.lit(result.value) + + case "reference": + if (result.tableAlias) { + return sql.ref(`${result.tableAlias}.${result.column}`) + } + return sql.ref(result.column) + + case "expression": + return result.value as RawBuilder + + case "query": + // wrap query as subquery + return sql`(${result.value})` + + default: + throw new Error(`cannot convert result to sql: ${(result as TranslationResult).type}`) + } +} diff --git a/packages/jsonata-querying/src/translator/nested.ts b/packages/jsonata-querying/src/translator/nested.ts new file mode 100644 index 0000000000..34ef717950 --- /dev/null +++ b/packages/jsonata-querying/src/translator/nested.ts @@ -0,0 +1,567 @@ +// nested query handling for quata +// handles scalar subqueries, correlated subqueries, and jsonArrayFrom patterns + +import type { ExprNode, PathNode } from "../jsonata.overrides.js" +import type { TranslationContext } from "./context.js" + +import { type RawBuilder, type SelectQueryBuilder, sql } from "kysely" + +import { createChildContext, generateAlias } from "./context.js" +import { + resultToSql, + TranslationError, + type TranslationResult, + translateExpression, +} from "./expression.js" + +// detect if an expression contains aggregate functions that need subquery wrapping +export function containsAggregate(node: ExprNode): boolean { + if (node.type === "function") { + const funcNode = node as unknown as { procedure: { value: string } } + const funcName = funcNode.procedure.value + if (["sum", "count", "average", "min", "max"].includes(funcName)) { + return true + } + } + + // recursively check children + const nodeAny = node as unknown as Record + + for (const key of Object.keys(nodeAny)) { + const value = nodeAny[key] + if (value && typeof value === "object") { + if (Array.isArray(value)) { + for (const item of value) { + if (item && typeof item === "object" && "type" in item) { + if (containsAggregate(item as ExprNode)) { + return true + } + } + } + } else if ("type" in value) { + if (containsAggregate(value as ExprNode)) { + return true + } + } + } + } + + return false +} + +// detect if an expression is a nested query (path starting with $$) +// in jsonata, $$tableName parses as a variable with value "$tableName" +export function isNestedQuery(node: ExprNode): boolean { + if (node.type === "path") { + const pathNode = node as unknown as PathNode + if (!pathNode.steps || pathNode.steps.length === 0) { + return false + } + + const firstStep = pathNode.steps[0] + if (firstStep.type !== "variable") { + return false + } + + const varValue = (firstStep as unknown as { value: string }).value + // $$ followed by tableName parses as variable "$tableName" + return varValue.startsWith("$") + } + + // $$items[filter] without projection parses as variable node (not path) + if (node.type === "variable") { + const varValue = (node as unknown as { value: string }).value + return varValue.startsWith("$") + } + + return false +} + +// extract table name from a $$ variable reference +export function extractTableFromVariable(varValue: string): string | null { + if (varValue.startsWith("$")) { + return varValue.slice(1) // remove the $ prefix + } + return null +} + +// build a nested query as a subquery +// handles both path nodes and variable nodes ($$items[filter]) +export function buildNestedQuery( + node: PathNode | ExprNode, + ctx: TranslationContext +): TranslationResult { + // create a child context for the nested query + const childCtx = createChildContext(ctx) + + let tableName: string | null = null + let tableAlias: string | null = null + let conditions: RawBuilder[] = [] + let sortTerms: Array<{ column: string; direction: "asc" | "desc" }> = [] + let limit: number | undefined + let offset: number | undefined + let projection: Array<[string, ExprNode]> | null = null + + // handle variable node with predicate ($$items[filter]) + if (node.type === "variable") { + const varNode = node as unknown as { + value: string + predicate?: Array<{ type: string; expr?: ExprNode }> + } + + if (varNode.value.startsWith("$")) { + tableName = varNode.value.slice(1) + tableAlias = generateAlias(childCtx) + + // process predicates as filters + if (varNode.predicate) { + childCtx.currentTable = tableName + childCtx.currentTableAlias = tableAlias + + for (const pred of varNode.predicate) { + if (pred.type === "filter" && pred.expr) { + if (pred.expr.type === "number") { + const idx = (pred.expr as unknown as { value: number }).value + if (idx >= 0) { + limit = 1 + offset = idx + } + } else { + const result = translateExpression(pred.expr, childCtx) + conditions.push(resultToSql(result, childCtx)) + } + } + } + } + } + } else if (node.type === "path") { + // extract table name and conditions from the path + const pathNode = node as PathNode + const analyzed = analyzeNestedPath(pathNode, childCtx) + tableName = analyzed.tableName + tableAlias = analyzed.tableAlias + conditions = analyzed.conditions + sortTerms = analyzed.sortTerms + limit = analyzed.limit + offset = analyzed.offset + projection = analyzed.projection + } + + if (!tableName) { + throw new TranslationError( + "could not determine table for nested query", + node as unknown as ExprNode, + ctx + ) + } + + const tableSchema = ctx.schema.tables[tableName] + if (!tableSchema) { + throw new TranslationError( + `unknown table in nested query: ${tableName}`, + node as unknown as ExprNode, + ctx + ) + } + + // update child context + childCtx.currentTable = tableName + childCtx.currentTableAlias = tableAlias + + // build the subquery + let subquery = ctx.db.selectFrom( + tableAlias ? `${tableSchema.table} as ${tableAlias}` : tableSchema.table + ) + + // apply projection or select all + if (projection) { + for (const [alias, valueExpr] of projection) { + const result = translateExpression(valueExpr, childCtx) + const sqlExpr = resultToSql(result, childCtx) + const compiled = sqlExpr.compile(ctx.db) + subquery = subquery.select( + sql.raw(`${compiled.sql} as "${alias}"`) as never + ) as typeof subquery + } + } else { + subquery = subquery.selectAll() as typeof subquery + } + + // apply WHERE conditions + for (const condition of conditions) { + subquery = subquery.where(condition as never) as typeof subquery + } + + // apply ORDER BY + for (const term of sortTerms) { + subquery = subquery.orderBy(sql.ref(term.column), term.direction) as typeof subquery + } + + // apply LIMIT/OFFSET + if (limit !== undefined) { + subquery = subquery.limit(limit) as typeof subquery + } + if (offset !== undefined) { + subquery = subquery.offset(offset) as typeof subquery + } + + return { + type: "query", + value: subquery as SelectQueryBuilder, string, unknown>, + } +} + +// analyze a nested path expression +function analyzeNestedPath( + pathNode: PathNode, + ctx: TranslationContext +): { + tableName: string | null + tableAlias: string | null + conditions: RawBuilder[] + sortTerms: Array<{ column: string; direction: "asc" | "desc" }> + limit: number | undefined + offset: number | undefined + projection: Array<[string, ExprNode]> | null +} { + let tableName: string | null = null + let tableAlias: string | null = null + const conditions: RawBuilder[] = [] + const sortTerms: Array<{ column: string; direction: "asc" | "desc" }> = [] + let limit: number | undefined + let offset: number | undefined + let projection: Array<[string, ExprNode]> | null = null + + const steps = pathNode.steps + + for (let i = 0; i < steps.length; i++) { + const step = steps[i] + + // $$ variable reference - in jsonata, $$tableName parses as variable "$tableName" + if (step.type === "variable") { + const varValue = (step as unknown as { value: string }).value + if (varValue.startsWith("$")) { + // $$tableName parses as "$tableName", so extract the table name + tableName = varValue.slice(1) + tableAlias = generateAlias(ctx) + } else if (varValue === "") { + // next step should be the table name (old pattern) + const nextStep = steps[i + 1] + if (nextStep && nextStep.type === "name") { + tableName = (nextStep as unknown as { value: string }).value + tableAlias = generateAlias(ctx) + i++ + } + } + continue + } + + // name that could be a table reference + if (step.type === "name" && !tableName) { + const nameValue = (step as unknown as { value: string }).value + if (ctx.schema.tables[nameValue]) { + tableName = nameValue + tableAlias = generateAlias(ctx) + } + } + + // check for filter stages + const stepWithStages = step as unknown as { + stages?: Array<{ type: string; expr?: ExprNode }> + } + + if (stepWithStages.stages) { + for (const stage of stepWithStages.stages) { + if (stage.type === "filter" && stage.expr) { + if (stage.expr.type === "number") { + const idx = (stage.expr as unknown as { value: number }).value + if (idx >= 0) { + limit = 1 + offset = idx + } + } else if (stage.expr.type === "unary") { + const unaryExpr = stage.expr as unknown as { + value: string + expressions?: ExprNode[] + } + if (unaryExpr.value === "[" && unaryExpr.expressions?.length === 1) { + const rangeExpr = unaryExpr.expressions[0] as unknown as { + type: string + value: string + lhs?: { value: number } + rhs?: { value: number } + } + if (rangeExpr.type === "binary" && rangeExpr.value === "..") { + const start = rangeExpr.lhs?.value ?? 0 + const end = rangeExpr.rhs?.value ?? 0 + limit = end - start + 1 + offset = start + } + } + } else { + // regular filter - translate with context + const filterCtx = { + ...ctx, + currentTable: tableName, + currentTableAlias: tableAlias, + } + const result = translateExpression(stage.expr, filterCtx) + conditions.push(resultToSql(result, filterCtx)) + } + } + } + } + + // sort expression + if (step.type === "sort") { + const sortNode = step as unknown as { + terms: Array<{ descending: boolean; expression: ExprNode }> + stages?: Array<{ type: string; expr?: ExprNode }> + } + + for (const term of sortNode.terms) { + const exprResult = translateExpression(term.expression, ctx) + if (exprResult.type === "reference") { + sortTerms.push({ + column: exprResult.tableAlias + ? `${exprResult.tableAlias}.${exprResult.column}` + : exprResult.column, + direction: term.descending ? "desc" : "asc", + }) + } + } + + // check for filter stages on sort + if (sortNode.stages) { + for (const stage of sortNode.stages) { + if (stage.type === "filter" && stage.expr?.type === "number") { + const idx = (stage.expr as unknown as { value: number }).value + limit = 1 + offset = idx >= 0 ? idx : undefined + } + } + } + } + + // projection + if (step.type === "unary") { + const unaryNode = step as unknown as { + value: string + lhs?: Array<[ExprNode, ExprNode]> + } + if (unaryNode.value === "{" && unaryNode.lhs) { + projection = unaryNode.lhs.map(([keyNode, valueNode]) => { + const key = + keyNode.type === "string" + ? ((keyNode as unknown as { value: string }).value as string) + : String((keyNode as unknown as { value: unknown }).value) + return [key, valueNode] as [string, ExprNode] + }) + } + } + } + + return { tableName, tableAlias, conditions, sortTerms, limit, offset, projection } +} + +// wrap an aggregate function call in a subquery +export function wrapAggregateInSubquery( + funcName: string, + args: TranslationResult[], + ctx: TranslationContext +): TranslationResult { + // for simple aggregates like $average(items.price) + // we need to find the table reference and build a subquery + + // check if the first argument is a path that we can extract a table from + // for now, just build a simple aggregate expression + const aggFuncs: Record = { + sum: "SUM", + count: "COUNT", + average: "AVG", + min: "MIN", + max: "MAX", + } + + const sqlFunc = aggFuncs[funcName] + if (!sqlFunc) { + throw new TranslationError( + `unknown aggregate function: ${funcName}`, + { type: "function" } as ExprNode, + ctx + ) + } + + if (args.length === 0) { + if (funcName === "count") { + return { type: "expression", value: sql`COUNT(*)` } + } + throw new TranslationError( + `${funcName} requires at least one argument`, + { type: "function" } as ExprNode, + ctx + ) + } + + const argSql = resultToSql(args[0], ctx) + return { type: "expression", value: sql.raw(`${sqlFunc}(${argSql.compile(ctx.db).sql})`) } +} + +// build a scalar subquery for an aggregate +export function buildScalarSubquery(node: ExprNode, ctx: TranslationContext): RawBuilder { + // if node is a function call with aggregate, and its argument is a path + // build SELECT AGG(col) FROM table WHERE ... + const funcNode = node as unknown as { + type: "function" + procedure: { value: string } + arguments: ExprNode[] + } + + const funcName = funcNode.procedure.value + const aggFuncs: Record = { + sum: "SUM", + count: "COUNT", + average: "AVG", + min: "MIN", + max: "MAX", + } + + const sqlFunc = aggFuncs[funcName] + if (!sqlFunc) { + // not an aggregate, translate normally + const result = translateExpression(node, ctx) + return resultToSql(result, ctx) + } + + // check if argument is a path expression + if (funcNode.arguments.length === 0) { + return sql`(SELECT COUNT(*))` + } + + const argNode = funcNode.arguments[0] + if (argNode.type === "path") { + const pathNode = argNode as unknown as PathNode + const { tableName, tableAlias, conditions, column } = extractPathInfo(pathNode, ctx) + + if (tableName) { + const tableSchema = ctx.schema.tables[tableName] + if (tableSchema) { + const tableSql = tableSchema.table + const alias = tableAlias ?? generateAlias(ctx) + const colRef = column ? `"${alias}"."${column}"` : `"${alias}".*` + + let query = sql.raw(`SELECT ${sqlFunc}(${colRef}) FROM "${tableSql}" AS "${alias}"`) + + if (conditions.length > 0) { + const whereClauses = conditions.map((c) => c.compile(ctx.db).sql).join(" AND ") + query = sql.raw(`${query.compile(ctx.db).sql} WHERE ${whereClauses}`) + } + + return sql`(${query})` + } + } + } + + // fallback to simple aggregate + const result = translateExpression(argNode, ctx) + const argSql = resultToSql(result, ctx) + return sql.raw(`${sqlFunc}(${argSql.compile(ctx.db).sql})`) +} + +// extract table and column info from a path +function extractPathInfo( + pathNode: PathNode, + ctx: TranslationContext +): { + tableName: string | null + tableAlias: string | null + conditions: RawBuilder[] + column: string | null +} { + let tableName: string | null = null + let tableAlias: string | null = null + const conditions: RawBuilder[] = [] + let column: string | null = null + + const steps = pathNode.steps + + for (let i = 0; i < steps.length; i++) { + const step = steps[i] + + if (step.type === "variable") { + const varValue = (step as unknown as { value: string }).value + if (varValue.startsWith("$")) { + // $$tableName parses as "$tableName" + tableName = varValue.slice(1) + tableAlias = generateAlias(ctx) + } else if (varValue === "") { + const nextStep = steps[i + 1] + if (nextStep && nextStep.type === "name") { + tableName = (nextStep as unknown as { value: string }).value + tableAlias = generateAlias(ctx) + i++ + } + } + continue + } + + if (step.type === "name") { + const nameValue = (step as unknown as { value: string }).value + if (!tableName && ctx.schema.tables[nameValue]) { + tableName = nameValue + tableAlias = generateAlias(ctx) + } else if (tableName) { + // this is a field reference + const tableSchema = ctx.schema.tables[tableName] + if (tableSchema && tableSchema.fields[nameValue]) { + column = tableSchema.fields[nameValue].column + } else { + column = nameValue + } + } + } + + // check for filter stages + const stepWithStages = step as unknown as { + stages?: Array<{ type: string; expr?: ExprNode }> + } + + if (stepWithStages.stages) { + for (const stage of stepWithStages.stages) { + if (stage.type === "filter" && stage.expr && stage.expr.type !== "number") { + const filterCtx = { + ...ctx, + currentTable: tableName, + currentTableAlias: tableAlias, + } + const result = translateExpression(stage.expr, filterCtx) + conditions.push(resultToSql(result, filterCtx)) + } + } + } + } + + return { tableName, tableAlias, conditions, column } +} + +// build a json_agg subquery for array results in projections +export function buildJsonArraySubquery( + pathNode: PathNode, + ctx: TranslationContext +): RawBuilder { + const result = buildNestedQuery(pathNode, ctx) + + if (result.type !== "query") { + throw new TranslationError( + "expected query result for json array subquery", + pathNode as unknown as ExprNode, + ctx + ) + } + + const subquery = result.value + const compiled = subquery.compile() + + // wrap in json_agg with COALESCE for empty results + return sql.raw(`COALESCE((SELECT json_agg(sub.*) FROM (${compiled.sql}) AS sub), '[]'::json)`) +} From 3baf4d669193edda9b865b583d986afbd3b6b3e9 Mon Sep 17 00:00:00 2001 From: "Thomas F. K. Jorna" Date: Thu, 5 Feb 2026 18:34:46 +0100 Subject: [PATCH 4/7] rename to quata --- packages/{jsonata-querying => quata}/SUBSET.md | 0 packages/{jsonata-querying => quata}/package.json | 0 packages/{jsonata-querying => quata}/src/__tests__/db.ts | 0 .../{jsonata-querying => quata}/src/__tests__/integration.test.ts | 0 .../{jsonata-querying => quata}/src/__tests__/translator.test.ts | 0 packages/{jsonata-querying => quata}/src/ast-creator.ts | 0 packages/{jsonata-querying => quata}/src/function-mapping.ts | 0 packages/{jsonata-querying => quata}/src/ideas.md | 0 packages/{jsonata-querying => quata}/src/index.test.ts | 0 packages/{jsonata-querying => quata}/src/index.ts | 0 packages/{jsonata-querying => quata}/src/jsonata.overrides.ts | 0 packages/{jsonata-querying => quata}/src/node-classification.ts | 0 packages/{jsonata-querying => quata}/src/quata.ts | 0 packages/{jsonata-querying => quata}/src/schema/types.ts | 0 packages/{jsonata-querying => quata}/src/subset-validator.test.ts | 0 packages/{jsonata-querying => quata}/src/subset-validator.ts | 0 .../{jsonata-querying => quata}/src/translation-patterns.test.ts | 0 packages/{jsonata-querying => quata}/src/translation-patterns.ts | 0 packages/{jsonata-querying => quata}/src/translator/context.ts | 0 packages/{jsonata-querying => quata}/src/translator/expression.ts | 0 packages/{jsonata-querying => quata}/src/translator/nested.ts | 0 packages/{jsonata-querying => quata}/tsconfig.json | 0 22 files changed, 0 insertions(+), 0 deletions(-) rename packages/{jsonata-querying => quata}/SUBSET.md (100%) rename packages/{jsonata-querying => quata}/package.json (100%) rename packages/{jsonata-querying => quata}/src/__tests__/db.ts (100%) rename packages/{jsonata-querying => quata}/src/__tests__/integration.test.ts (100%) rename packages/{jsonata-querying => quata}/src/__tests__/translator.test.ts (100%) rename packages/{jsonata-querying => quata}/src/ast-creator.ts (100%) rename packages/{jsonata-querying => quata}/src/function-mapping.ts (100%) rename packages/{jsonata-querying => quata}/src/ideas.md (100%) rename packages/{jsonata-querying => quata}/src/index.test.ts (100%) rename packages/{jsonata-querying => quata}/src/index.ts (100%) rename packages/{jsonata-querying => quata}/src/jsonata.overrides.ts (100%) rename packages/{jsonata-querying => quata}/src/node-classification.ts (100%) rename packages/{jsonata-querying => quata}/src/quata.ts (100%) rename packages/{jsonata-querying => quata}/src/schema/types.ts (100%) rename packages/{jsonata-querying => quata}/src/subset-validator.test.ts (100%) rename packages/{jsonata-querying => quata}/src/subset-validator.ts (100%) rename packages/{jsonata-querying => quata}/src/translation-patterns.test.ts (100%) rename packages/{jsonata-querying => quata}/src/translation-patterns.ts (100%) rename packages/{jsonata-querying => quata}/src/translator/context.ts (100%) rename packages/{jsonata-querying => quata}/src/translator/expression.ts (100%) rename packages/{jsonata-querying => quata}/src/translator/nested.ts (100%) rename packages/{jsonata-querying => quata}/tsconfig.json (100%) diff --git a/packages/jsonata-querying/SUBSET.md b/packages/quata/SUBSET.md similarity index 100% rename from packages/jsonata-querying/SUBSET.md rename to packages/quata/SUBSET.md diff --git a/packages/jsonata-querying/package.json b/packages/quata/package.json similarity index 100% rename from packages/jsonata-querying/package.json rename to packages/quata/package.json diff --git a/packages/jsonata-querying/src/__tests__/db.ts b/packages/quata/src/__tests__/db.ts similarity index 100% rename from packages/jsonata-querying/src/__tests__/db.ts rename to packages/quata/src/__tests__/db.ts diff --git a/packages/jsonata-querying/src/__tests__/integration.test.ts b/packages/quata/src/__tests__/integration.test.ts similarity index 100% rename from packages/jsonata-querying/src/__tests__/integration.test.ts rename to 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a/packages/jsonata-querying/src/index.test.ts b/packages/quata/src/index.test.ts similarity index 100% rename from packages/jsonata-querying/src/index.test.ts rename to packages/quata/src/index.test.ts diff --git a/packages/jsonata-querying/src/index.ts b/packages/quata/src/index.ts similarity index 100% rename from packages/jsonata-querying/src/index.ts rename to packages/quata/src/index.ts diff --git a/packages/jsonata-querying/src/jsonata.overrides.ts b/packages/quata/src/jsonata.overrides.ts similarity index 100% rename from packages/jsonata-querying/src/jsonata.overrides.ts rename to packages/quata/src/jsonata.overrides.ts diff --git a/packages/jsonata-querying/src/node-classification.ts b/packages/quata/src/node-classification.ts similarity index 100% rename from packages/jsonata-querying/src/node-classification.ts rename to packages/quata/src/node-classification.ts diff --git a/packages/jsonata-querying/src/quata.ts b/packages/quata/src/quata.ts similarity index 100% rename from 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packages/jsonata-querying/src/translation-patterns.test.ts rename to packages/quata/src/translation-patterns.test.ts diff --git a/packages/jsonata-querying/src/translation-patterns.ts b/packages/quata/src/translation-patterns.ts similarity index 100% rename from packages/jsonata-querying/src/translation-patterns.ts rename to packages/quata/src/translation-patterns.ts diff --git a/packages/jsonata-querying/src/translator/context.ts b/packages/quata/src/translator/context.ts similarity index 100% rename from packages/jsonata-querying/src/translator/context.ts rename to packages/quata/src/translator/context.ts diff --git a/packages/jsonata-querying/src/translator/expression.ts b/packages/quata/src/translator/expression.ts similarity index 100% rename from packages/jsonata-querying/src/translator/expression.ts rename to packages/quata/src/translator/expression.ts diff --git a/packages/jsonata-querying/src/translator/nested.ts b/packages/quata/src/translator/nested.ts similarity index 100% rename from packages/jsonata-querying/src/translator/nested.ts rename to packages/quata/src/translator/nested.ts diff --git a/packages/jsonata-querying/tsconfig.json b/packages/quata/tsconfig.json similarity index 100% rename from packages/jsonata-querying/tsconfig.json rename to packages/quata/tsconfig.json From 863cf17e037aa88342dbc94a6c765171c7d372b6 Mon Sep 17 00:00:00 2001 From: "Thomas F. K. Jorna" Date: Thu, 5 Feb 2026 20:03:17 +0100 Subject: [PATCH 5/7] feat: add tests to play --- .../server/jsonata-query/jsonquery.db.test.ts | 245 ++++++++++++++++++ 1 file changed, 245 insertions(+) create mode 100644 core/lib/server/jsonata-query/jsonquery.db.test.ts diff --git a/core/lib/server/jsonata-query/jsonquery.db.test.ts b/core/lib/server/jsonata-query/jsonquery.db.test.ts new file mode 100644 index 0000000000..e5c66e21c8 --- /dev/null +++ b/core/lib/server/jsonata-query/jsonquery.db.test.ts @@ -0,0 +1,245 @@ +/** biome-ignore-all lint/suspicious/noConsole: */ +import { beforeAll, describe, expect, it } from "vitest" + +import { createQuata, defineSchema, type Quata } from "@pubpub/quata" +import { CoreSchemaType, MemberRole } from "db/public" + +import { mockServerCode } from "~/lib/__tests__/utils" +import { createSeed } from "~/prisma/seed/createSeed" + +// import { createLastModifiedBy } from "../lastModifiedBy" + +const { createForEachMockedTransaction } = await mockServerCode() + +const { getTrx } = createForEachMockedTransaction() + +const _seed = createSeed({ + community: { + name: "test", + slug: "test-server-pub", + }, + users: { + admin: { + role: MemberRole.admin, + }, + stageEditor: { + role: MemberRole.contributor, + }, + }, + pubFields: { + Title: { schemaName: CoreSchemaType.String }, + Description: { schemaName: CoreSchemaType.String }, + "Some relation": { schemaName: CoreSchemaType.String, relation: true }, + }, + pubTypes: { + "Basic Pub": { + Title: { isTitle: true }, + "Some relation": { isTitle: false }, + }, + "Minimal Pub": { + Title: { isTitle: true }, + }, + }, + stages: { + "Stage 1": { + members: { + stageEditor: MemberRole.editor, + }, + }, + "Stage 2": {}, + }, + pubs: [ + { + pubType: "Basic Pub", + values: { + Title: "Some title", + }, + stage: "Stage 1", + }, + { + pubType: "Basic Pub", + values: { + Title: "Another title", + Description: "Some description", + }, + relatedPubs: { + "Some relation": [ + { + value: "test relation value", + pub: { + pubType: "Basic Pub", + values: { + Title: "A pub related to another Pub", + }, + }, + }, + ], + }, + }, + { + stage: "Stage 1", + pubType: "Minimal Pub", + values: { + Title: "Minimal pub", + }, + }, + ], +}) + +const schema = defineSchema({ + tables: { + pubs: { + fields: { + id: { type: "string", column: "id" }, + title: { type: "string", column: "title" }, + createdAt: { type: "date", column: "createdAt" }, + updatedAt: { type: "date", column: "updatedAt" }, + }, + relations: { + stage: { + target: "stages", + foreignKey: "stageId", + targetKey: "id", + type: "many-to-one", + }, + pubType: { + target: "pub_types", + foreignKey: "pubTypeId", + type: "many-to-one", + targetKey: "id", + }, + community: { + target: "communities", + foreignKey: "communityId", + type: "many-to-one", + targetKey: "id", + }, + values: { + target: "pub_values", + foreignKey: "id", + targetKey: "pubId", + type: "one-to-many", + }, + }, + }, + stages: { + fields: { + id: { type: "string", column: "id" }, + name: { type: "string", column: "name" }, + createdAt: { type: "date", column: "createdAt" }, + updatedAt: { type: "date", column: "updatedAt" }, + }, + }, + pub_types: { + fields: { + id: { type: "string", column: "id" }, + name: { type: "string", column: "name" }, + createdAt: { type: "date", column: "createdAt" }, + updatedAt: { type: "date", column: "updatedAt" }, + }, + }, + communities: { + fields: { + id: { type: "string", column: "id" }, + name: { type: "string", column: "name" }, + createdAt: { type: "date", column: "createdAt" }, + updatedAt: { type: "date", column: "updatedAt" }, + }, + }, + pub_values: { + fields: { + id: { type: "string", column: "id" }, + value: { type: "jsonb", column: "value", nullable: true }, + createdAt: { type: "date", column: "createdAt" }, + updatedAt: { type: "date", column: "updatedAt" }, + relatedPubId: { type: "string", column: "relatedPubId", nullable: true }, + }, + relations: { + field: { + target: "pub_fields", + foreignKey: "fieldId", + targetKey: "id", + type: "many-to-one", + }, + }, + }, + pub_fields: { + fields: { + id: { type: "string", column: "id" }, + name: { type: "string", column: "name" }, + slug: { type: "string", column: "slug" }, + schemaName: { type: "string", column: "schemaName" }, + isRelation: { type: "boolean", column: "isRelation" }, + createdAt: { type: "date", column: "createdAt" }, + updatedAt: { type: "date", column: "updatedAt" }, + }, + }, + }, +}) + +let _quata: Quata + +beforeAll(async () => {}) +type TestCase = + | [string, string, (results: any[]) => void] + | [string, string, (results: any[]) => void, { debug: boolean }] + +describe("jsonata query", () => { + it.for([ + [ + "Simple title filter", + "$$pubs[title = 'Some title']", + (results) => { + expect(results).toHaveLength(1) + expect(results[0].title).toBe("Some title") + }, + ], + [ + "pubtype", + "$$pubs[pubType.name = 'Basic Pub']", + (results) => { + expect(results).toHaveLength(3) + expect(results[0].pubType.name).toBe("Basic Pub") + expect(results[1].pubType.name).toBe("Basic Pub") + }, + { debug: true }, + ], + [ + "pub values", + `$$pubs[values.value = '"Some title"']`, + (results) => { + expect(results).toHaveLength(1) + console.log(results[0]) + expect(results[0].values[0].value).toBe("Some title") + }, + { debug: true }, + ], + + [ + "pub values better", + "$$pubs[$contains(values.description, 'description')].{ title: $.title, description: $.values.description }", + (results) => { + expect(results).toHaveLength(1) + expect(results[0].title).toBe("Some title") + expect(results[0].description).toBe("Some description") + }, + { debug: true }, + ], + ] satisfies TestCase[])("%s", async ([title, expression, expected, options]) => { + const { seedCommunity } = await import("~/prisma/seed/seedCommunity") + const trx = getTrx() + const _community = await seedCommunity(_seed, undefined, trx) + + const quata = createQuata(schema, trx) + const query = quata.compile(expression) + if (options?.debug) { + console.log("AAAAAAAAAAAAAA") + console.log(query.sql) + } + const queryBuilder = query.toQueryBuilder() + const resultq = queryBuilder.where("t0.communityId", "=", _community.community.id) + + const results = await resultq.execute() + expected(results) + }) +}) From 9315a4dd0d77e948a4d01e0e4fe2ee1e89e457bd Mon Sep 17 00:00:00 2001 From: "Thomas F. K. Jorna" Date: Mon, 9 Feb 2026 16:40:26 +0100 Subject: [PATCH 6/7] feat: somewhat working --- .../jsonata-query/expression-splitter.ts | 133 ++ .../server/jsonata-query/jsonata.overrides.ts | 1154 +++++++++++++++++ .../server/jsonata-query/jsonquery.db.test.ts | 212 ++- .../jsonata-query/post-fetch-projection.ts | 40 + core/lib/server/jsonata-query/pubpub-quata.ts | 589 +++++++++ core/lib/server/pub.ts | 17 +- core/package.json | 2 + packages/quata/package.json | 8 +- packages/quata/src/ast-cache.ts | 40 + packages/quata/src/index.ts | 20 + packages/quata/src/quata.ts | 230 +++- packages/quata/src/schema/from-kysely.ts | 123 ++ packages/quata/src/subset-validator.ts | 8 +- packages/quata/src/translator/expression.ts | 65 +- pnpm-lock.yaml | 270 ++-- 15 files changed, 2644 insertions(+), 267 deletions(-) create mode 100644 core/lib/server/jsonata-query/expression-splitter.ts create mode 100644 core/lib/server/jsonata-query/jsonata.overrides.ts create mode 100644 core/lib/server/jsonata-query/post-fetch-projection.ts create mode 100644 core/lib/server/jsonata-query/pubpub-quata.ts create mode 100644 packages/quata/src/ast-cache.ts create mode 100644 packages/quata/src/schema/from-kysely.ts diff --git a/core/lib/server/jsonata-query/expression-splitter.ts b/core/lib/server/jsonata-query/expression-splitter.ts new file mode 100644 index 0000000000..a2bc9dbb28 --- /dev/null +++ b/core/lib/server/jsonata-query/expression-splitter.ts @@ -0,0 +1,133 @@ +// splits a full quata expression into query and projection parts +// +// query part: filter, sort, limit -> compiled to SQL +// projection part: transformation -> evaluated in-memory via JSONata against pub proxy +// +// example: +// input: $$pubs[status = 'published']^(>createdAt)[[0..9]].{ "title": values.title } +// query: $$pubs[status = 'published']^(>createdAt)[[0..9]] +// projection: { "title": values.title } + +import type { ExprNode } from "@pubpub/quata" + +import { parseExpression } from "@pubpub/quata" + +export interface SplitExpression { + // the full original expression + original: string + // the query part (filter/sort/limit), or the full expression if no projection + queryExpression: string + // the projection part as a jsonata expression string, or null if no projection + projectionExpression: string | null + // whether the expression contains a projection + hasProjection: boolean +} + +// split a quata expression into query and projection parts +export function splitExpression(expression: string): SplitExpression { + const ast = parseExpression(expression) + + if (ast.type !== "path") { + // not a path expression, so no projection to split + return { + original: expression, + queryExpression: expression, + projectionExpression: null, + hasProjection: false, + } + } + + const pathNode = ast as unknown as { steps: Array> } + const steps = pathNode.steps + + if (steps.length === 0) { + return { + original: expression, + queryExpression: expression, + projectionExpression: null, + hasProjection: false, + } + } + + // the projection is the last step if it's an object constructor + // or a block containing an object constructor + const lastStep = steps[steps.length - 1] + const isProjection = + (lastStep.type === "unary" && lastStep.value === "{") || + lastStep.type === "block" + + if (!isProjection) { + return { + original: expression, + queryExpression: expression, + projectionExpression: null, + hasProjection: false, + } + } + + // find where the projection starts in the original string + // the projection is a `.{...}` or `.(...)` at the end + const projectionStart = findProjectionStart(expression, lastStep) + + if (projectionStart === -1) { + return { + original: expression, + queryExpression: expression, + projectionExpression: null, + hasProjection: false, + } + } + + const queryPart = expression.slice(0, projectionStart).trimEnd() + // remove the leading dot if present + let projPart = expression.slice(projectionStart).trimStart() + if (projPart.startsWith(".")) { + projPart = projPart.slice(1) + } + + // wrap the projection so it evaluates against each item + // the in-memory evaluator will apply this to each pub via the pub proxy + // the $ prefix references the current item + const projectionExpression = projPart + + return { + original: expression, + queryExpression: queryPart, + projectionExpression, + hasProjection: true, + } +} + +// find the character position where the projection starts in the expression +// uses the ast position metadata to locate the projection +function findProjectionStart(expression: string, projectionNode: Record): number { + // the ast position gives us the position of the first token of the node + // for unary nodes (object constructors), this is the position of `{` + if (projectionNode.position !== undefined) { + // jsonata positions are 1-based + const pos = (projectionNode.position as number) - 1 + + // walk backwards from the position to find the dot separator + let dotPos = pos + while (dotPos > 0 && expression[dotPos - 1] === ".") { + dotPos-- + } + // also handle whitespace before dot + while (dotPos > 0 && expression[dotPos - 1] === " ") { + dotPos-- + } + if (dotPos > 0 && expression[dotPos - 1] === ".") { + dotPos-- + } + return dotPos + } + + // fallback: scan backwards from the end for the `.{` or `.(` pattern + const lastBrace = expression.lastIndexOf(".{") + if (lastBrace !== -1) return lastBrace + + const lastParen = expression.lastIndexOf(".(") + if (lastParen !== -1) return lastParen + + return -1 +} diff --git a/core/lib/server/jsonata-query/jsonata.overrides.ts b/core/lib/server/jsonata-query/jsonata.overrides.ts new file mode 100644 index 0000000000..1b9e9f7d82 --- /dev/null +++ b/core/lib/server/jsonata-query/jsonata.overrides.ts @@ -0,0 +1,1154 @@ +// Type definitions for jsonata 2.x +// Project: https://github.com/jsonata-js/jsonata +// Definitions by: Nick and Michael M. Tiller +// Enhanced AST types for programmatic analysis + +declare module "jsonata" { + function jsonata(str: string, options?: jsonata.JsonataOptions): jsonata.Expression + namespace jsonata { + interface JsonataOptions { + /** attempt to recover on parse errors and return partial AST with errors array */ + recover?: boolean + /** custom RegExp engine constructor */ + RegexEngine?: RegExp + } + + // ============================================================================ + // Base Node Types + // ============================================================================ + + interface BaseNode { + /** character position in source expression where this node begins */ + position?: number + /** the value associated with this node (type varies by node type) */ + value?: unknown + /** + * when true, forces the result to be wrapped in an array even if singleton + * triggered by empty square brackets: `expr[]` + */ + keepArray?: boolean + } + + /** + * used internally to track parent (%) operator resolution across path steps + * the parent operator allows referencing the context value from outer path steps + * @example `Account.Order.Product.(Price * %.Quantity)` - % refers to Order + */ + interface AncestorSlot { + /** internal label for binding the ancestor value */ + label: string + /** how many levels up to look (1 = immediate parent) */ + level: number + /** internal index for tracking multiple parent references */ + index: number + } + + // ============================================================================ + // Literal Nodes + // ============================================================================ + + /** + * string literal - can use single or double quotes + * @example `"hello world"` or `'hello world'` + * supports escape sequences: \", \\, \/, \b, \f, \n, \r, \t, \uXXXX + */ + interface StringNode extends BaseNode { + type: "string" + value: string + } + + /** + * number literal - JSON-compatible number format + * @example `42`, `-3.14`, `1.5e10` + */ + interface NumberNode extends BaseNode { + type: "number" + value: number + } + + /** + * boolean or null literal + * @example `true`, `false`, `null` + */ + interface ValueNode extends BaseNode { + type: "value" + value: boolean | null + } + + /** + * regular expression literal + * @example `/pattern/` or `/pattern/i` or `/pattern/m` + * flags: i (case-insensitive), m (multiline) + * g flag is automatically added for JSONata's regex functions + */ + interface RegexNode extends BaseNode { + type: "regex" + value: RegExp + } + + // ============================================================================ + // Identifier Nodes + // ============================================================================ + + /** + * field name reference - accesses a property from the context object + * @example `Name` - simple field + * @example `Account.Name` - nested field access + * @example `` `field-name` `` - backtick-quoted name for special characters + */ + interface NameNode extends BaseNode { + type: "name" + /** the field name to access */ + value: string + /** internal: true when participating in tuple streaming */ + tuple?: boolean + /** internal: ancestor reference for parent (%) operator */ + ancestor?: AncestorSlot + } + + /** + * variable reference - accesses a bound variable + * @example `$x` - user-defined variable + * @example `$` - the root input document + * @example `$$` - the root of the current expression context + * special variables: + * - `$` refers to the root input + * - `$$` refers to the entire input at expression start + */ + interface VariableNode extends BaseNode { + type: "variable" + /** the variable name (without $ prefix) - empty string for $ */ + value: string + } + + // ============================================================================ + // Wildcard Nodes + // ============================================================================ + + /** + * single-level wildcard - matches all fields at current level + * @example `Account.*` - all fields of Account + * @example `Account.Order.*` - all fields of each Order + */ + interface WildcardNode extends BaseNode { + type: "wildcard" + value: "*" + /** internal: true when participating in tuple streaming */ + tuple?: boolean + /** internal: ancestor reference for parent (%) operator */ + ancestor?: AncestorSlot + } + + /** + * recursive descendant wildcard - matches all nested values at any depth + * @example `Account.**` - all values at any depth under Account + * @example `**.Price` - all Price fields anywhere in the document + */ + interface DescendantNode extends BaseNode { + type: "descendant" + value: "**" + } + + /** + * parent operator - references the context value from an outer path step + * allows correlation between nested values and their containers + * @example `Account.Order.Product.(Price * %.Quantity)` - % refers to Order + * @example `Account.(Order.Product[$price < %.limit])` - % refers to Account + */ + interface ParentNode extends BaseNode { + type: "parent" + /** information about which ancestor level to reference */ + slot: AncestorSlot + } + + // ============================================================================ + // Operator Types + // ============================================================================ + + /** arithmetic operators: +, -, *, /, % */ + type ArithmeticOperator = "+" | "-" | "*" | "/" | "%" + + /** + * comparison operators + * = and != perform deep equality comparison + * <, <=, >, >= work on numbers and strings + */ + type ComparisonOperator = "=" | "!=" | "<" | "<=" | ">" | ">=" + + /** + * boolean operators - operands are cast to boolean first + * @example `$a and $b` - both must be truthy + * @example `$a or $b` - at least one must be truthy + */ + type BooleanOperator = "and" | "or" + + /** + * string concatenation operator + * @example `"Hello" & " " & "World"` => "Hello World" + * operands are cast to string + */ + type StringOperator = "&" + + /** + * range operator - creates an array of integers + * @example `[1..5]` => [1, 2, 3, 4, 5] + * @example `[5..1]` => undefined (empty - range must be ascending) + */ + type RangeOperator = ".." + + /** + * inclusion/membership operator + * @example `"a" in ["a", "b", "c"]` => true + * @example `5 in [1, 2, 3]` => false + */ + type InclusionOperator = "in" + + type BinaryOperatorValue = + | ArithmeticOperator + | ComparisonOperator + | BooleanOperator + | StringOperator + | RangeOperator + | InclusionOperator + + // ============================================================================ + // Binary Expression Nodes + // ============================================================================ + + /** + * binary expression - two operands with an operator + * @example `$a + $b` - arithmetic + * @example `$a = $b` - comparison + * @example `$a and $b` - boolean + * @example `$a & $b` - string concatenation + * @example `1..10` - range + * @example `$x in $list` - inclusion + */ + interface BinaryNode extends BaseNode { + type: "binary" + /** the operator */ + value: BinaryOperatorValue + /** left-hand side operand */ + lhs: ExprNode + /** right-hand side operand */ + rhs: ExprNode + } + + // ============================================================================ + // Path Expression Nodes + // ============================================================================ + + /** + * a filter predicate stage within a path step + * @example `Account.Order[Price > 100]` - the `[Price > 100]` part + */ + interface FilterStage { + type: "filter" + /** the predicate expression to evaluate for each item */ + expr: ExprNode + position?: number + } + + /** + * position variable binding stage using the # operator + * @example `Account.Order#$i` - binds the array index to $i + * @example `Account.Order#$i[Price > 100]` - can be combined with predicates + */ + interface IndexStage { + type: "index" + /** the variable name to bind the index to (without $) */ + value: string + position?: number + } + + type Stage = FilterStage | IndexStage + + /** + * a sort term within an order-by expression + */ + interface SortTerm { + /** true for descending order (>) false for ascending (<) */ + descending: boolean + /** the expression to evaluate for comparison */ + expression: ExprNode + } + + /** + * order-by/sort node - created from the ^ operator + * @example `Account.Order^(Price)` - ascending by Price + * @example `Account.Order^(>Price)` - descending by Price + * @example `Account.Order^(>Price, 100].Product` - path with predicate + * @example `Account@$a.Order.Product[Price < $average($a.Products.Price)]` - with focus binding + * @example `Account.Order^(>Price)` - path with sort + */ + interface PathNode extends BaseNode { + type: "path" + /** + * the steps in this path expression + * steps can be any expression plus PathStepExtensions properties + */ + steps: ((ExprNode & Partial) | SortNode)[] + /** when true, result is always an array even for singletons */ + keepSingletonArray?: boolean + /** true when path contains tuple-streaming steps (focus/index binding) */ + tuple?: boolean + /** parent (%) references that need resolution at a higher level */ + seekingParent?: AncestorSlot[] + } + + // ============================================================================ + // Bind Expression (Variable Assignment) + // ============================================================================ + + /** + * variable binding/assignment expression using := + * @example `$x := 5` - binds 5 to $x + * @example `$result := Account.Order.Product.Price` - binds path result to $result + */ + interface BindNode extends BaseNode { + type: "bind" + value: ":=" + /** the variable to bind to (must be a variable reference) */ + lhs: VariableNode + /** the expression whose result is bound to the variable */ + rhs: ExprNode + } + + // ============================================================================ + // Apply Expression (Function Application ~>) + // ============================================================================ + + /** + * function application/chaining using ~> + * pipes the LHS result into the RHS function as its first argument + * @example `$data ~> $sum()` - passes $data as first arg to $sum + * @example `Account.Order.Price ~> $sum() ~> $formatNumber()` - chaining + * @example `$f ~> $g` - function composition (creates a new function) + */ + interface ApplyNode extends BaseNode { + type: "apply" + value: "~>" + /** expression whose result becomes the first argument */ + lhs: ExprNode + /** function to apply (or another function for composition) */ + rhs: ExprNode + } + + // ============================================================================ + // Unary Expression Nodes + // ============================================================================ + + /** + * numeric negation + * @example `-5` or `-$price` + */ + interface NegationNode extends BaseNode { + type: "unary" + value: "-" + expression: ExprNode + } + + /** + * array constructor - creates a new array from expressions + * @example `[1, 2, 3]` - literal array + * @example `[Account.Order.Price, Account.Order.Quantity]` - from expressions + * @example `Account.Order.[[Price, Quantity]]` - nested array in path + */ + interface ArrayConstructorNode extends BaseNode { + type: "unary" + value: "[" + /** the expressions that form the array elements */ + expressions: ExprNode[] + /** when true, array should not be flattened during path evaluation */ + consarray?: boolean + } + + /** + * object constructor - creates a new object from key-value pairs + * @example `{"name": "John", "age": 30}` - literal object + * @example `{Product.Name: Product.Price}` - dynamic keys/values + * @example `Account.Order.{ProductID: Price}` - object from each order + */ + interface ObjectConstructorNode extends BaseNode { + type: "unary" + value: "{" + /** array of [key, value] expression pairs */ + lhs: [ExprNode, ExprNode][] + } + + type UnaryNode = NegationNode | ArrayConstructorNode | ObjectConstructorNode + + // ============================================================================ + // Function Nodes + // ============================================================================ + + /** + * function invocation + * @example `$sum(Account.Order.Price)` - calling built-in function + * @example `$myFunc(1, 2, 3)` - calling user-defined function + * @example `$substring("hello", 0, 3)` - with multiple arguments + */ + interface FunctionNode extends BaseNode { + type: "function" + value: "(" + /** the function to call (usually a variable or path to function) */ + procedure: ExprNode + /** the arguments to pass to the function */ + arguments: ExprNode[] + /** when chaining functions via dot, the next function name (for thenable detection) */ + nextFunction?: string + } + + /** + * placeholder for partial function application + * @example `$add(?, 5)` - the ? becomes a placeholder + */ + interface PartialPlaceholderNode extends BaseNode { + type: "operator" + value: "?" + } + + /** + * partial function application - creates a new function with some args pre-bound + * @example `$add(?, 5)` - returns a function that adds 5 to its argument + * @example `$substringBefore(?, "-")` - function that gets text before "-" + */ + interface PartialNode extends BaseNode { + type: "partial" + value: "(" + /** the function to partially apply */ + procedure: ExprNode + /** arguments where ? marks positions for future arguments */ + arguments: (ExprNode | PartialPlaceholderNode)[] + } + + /** a parameter in a lambda function definition */ + interface LambdaArgument { + type: "variable" + /** the parameter name (without $) */ + value: string + position?: number + } + + /** parsed function signature for type checking */ + interface LambdaSignature { + validate: (args: unknown[], context: unknown) => unknown[] + } + + /** + * lambda/function definition + * @example `function($x) { $x * 2 }` - simple lambda + * @example `λ($x, $y) { $x + $y }` - using lambda symbol (λ) + * @example `function($x) { $x * 2 }` - with type signature + * @example `$map([1,2,3], function($v) { $v * 2 })` - inline lambda + */ + interface LambdaNode extends BaseNode { + type: "lambda" + /** the parameter list */ + arguments: LambdaArgument[] + /** the function body expression */ + body: ExprNode + /** optional type signature for argument validation (parsed from <...>) */ + signature?: LambdaSignature + /** internal: true when optimized for tail-call */ + thunk?: boolean + } + + // ============================================================================ + // Condition Node (Ternary Operator) + // ============================================================================ + + /** + * conditional/ternary expression + * @example `$x > 0 ? "positive" : "non-positive"` - with else + * @example `$x > 0 ? "positive"` - without else (returns undefined if false) + * @example `$value ?: "default"` - elvis operator (shorthand for $value ? $value : "default") + * @example `$value ?? "default"` - coalescing operator (returns "default" if $value doesn't exist) + */ + interface ConditionNode extends BaseNode { + type: "condition" + /** the condition to evaluate (cast to boolean) */ + condition: ExprNode + /** expression to evaluate if condition is truthy */ + then: ExprNode + /** expression to evaluate if condition is falsy (optional) */ + else?: ExprNode + } + + // ============================================================================ + // Block Node (Sequence of Expressions) + // ============================================================================ + + /** + * block expression - sequence of expressions separated by semicolons + * executes in order, returns the result of the last expression + * creates a new scope for variable bindings + * @example `($x := 5; $y := 10; $x + $y)` - returns 15 + * @example `Account.($name := Name; $orders := Order; {"name": $name, "total": $sum($orders.Price)})` + */ + interface BlockNode extends BaseNode { + type: "block" + /** expressions to evaluate in sequence */ + expressions: ExprNode[] + /** internal: true if block contains an array constructor */ + consarray?: boolean + } + + // ============================================================================ + // Transform Node (Object Transformer) + // ============================================================================ + + /** + * object transformer - clones input and applies updates/deletions + * @example `| Account | {"status": "active"} |` - adds/updates status field + * @example `| Account.Order | {"discount": 0.1}, ["tax"] |` - update and delete + * @example `$ ~> | Account | {"verified": true} |` - transform in pipeline + */ + interface TransformNode extends BaseNode { + type: "transform" + /** path pattern to match objects to transform */ + pattern: ExprNode + /** object expression with fields to add/update */ + update: ExprNode + /** optional: string or array of strings - field names to delete */ + delete?: ExprNode + } + + // ============================================================================ + // Group Expression (Object Grouping) + // ============================================================================ + + /** + * object grouping expression - groups values by key + * used when object constructor follows expression without dot separator + * @example `Account.Order.Product{Category: Price}` - groups prices by category + * @example `Account.Order{OrderID: $sum(Product.Price)}` - aggregate per group + */ + interface GroupExpression { + /** array of [key, value] expression pairs */ + lhs: [ExprNode, ExprNode][] + position?: number + } + + // ============================================================================ + // Error Node (Recovery Mode) + // ============================================================================ + + interface ErrorNode extends BaseNode { + type: "error" + error: JsonataError + lhs?: ExprNode + remaining?: unknown[] + } + + // ============================================================================ + // Union Type of All Expression Nodes + // ============================================================================ + + type ExprNode = + | StringNode + | NumberNode + | ValueNode + | RegexNode + | NameNode + | VariableNode + | WildcardNode + | DescendantNode + | ParentNode + | BinaryNode + | PathNode + | BindNode + | ApplyNode + | UnaryNode + | FunctionNode + | PartialNode + | LambdaNode + | ConditionNode + | BlockNode + | TransformNode + | SortNode + | ErrorNode + + // ============================================================================ + // Type Guards (suggested implementations - not provided by JSONata) + // ============================================================================ + + /** + * type guard helpers for working with the AST + * note: these are type declarations only - you must implement them yourself + * @example + * ```typescript + * function isStringNode(node: ExprNode): node is StringNode { + * return node.type === "string"; + * } + * ``` + */ + + function isStringNode(node: ExprNode): node is StringNode + function isNumberNode(node: ExprNode): node is NumberNode + function isValueNode(node: ExprNode): node is ValueNode + function isRegexNode(node: ExprNode): node is RegexNode + function isNameNode(node: ExprNode): node is NameNode + function isVariableNode(node: ExprNode): node is VariableNode + function isWildcardNode(node: ExprNode): node is WildcardNode + function isDescendantNode(node: ExprNode): node is DescendantNode + function isParentNode(node: ExprNode): node is ParentNode + function isBinaryNode(node: ExprNode): node is BinaryNode + function isPathNode(node: ExprNode): node is PathNode + function isBindNode(node: ExprNode): node is BindNode + function isApplyNode(node: ExprNode): node is ApplyNode + function isUnaryNode(node: ExprNode): node is UnaryNode + function isFunctionNode(node: ExprNode): node is FunctionNode + function isPartialNode(node: ExprNode): node is PartialNode + function isLambdaNode(node: ExprNode): node is LambdaNode + function isConditionNode(node: ExprNode): node is ConditionNode + function isBlockNode(node: ExprNode): node is BlockNode + function isTransformNode(node: ExprNode): node is TransformNode + function isSortNode(node: ExprNode): node is SortNode + function isErrorNode(node: ExprNode): node is ErrorNode + + // ============================================================================ + // AST Visitor Interface (suggested pattern for traversal) + // ============================================================================ + + /** + * visitor pattern interface for traversing the AST + * implement this interface to process each node type differently + * @example + * ```typescript + * const visitor: AstVisitor = { + * visitString: (node) => `"${node.value}"`, + * visitNumber: (node) => String(node.value), + * visitPath: (node) => node.steps.map(s => visit(s)).join("."), + * // ... etc + * }; + * ``` + */ + interface AstVisitor { + visitString?(node: StringNode): T + visitNumber?(node: NumberNode): T + visitValue?(node: ValueNode): T + visitRegex?(node: RegexNode): T + visitName?(node: NameNode): T + visitVariable?(node: VariableNode): T + visitWildcard?(node: WildcardNode): T + visitDescendant?(node: DescendantNode): T + visitParent?(node: ParentNode): T + visitBinary?(node: BinaryNode): T + visitPath?(node: PathNode): T + visitBind?(node: BindNode): T + visitApply?(node: ApplyNode): T + visitUnary?(node: UnaryNode): T + visitFunction?(node: FunctionNode): T + visitPartial?(node: PartialNode): T + visitLambda?(node: LambdaNode): T + visitCondition?(node: ConditionNode): T + visitBlock?(node: BlockNode): T + visitTransform?(node: TransformNode): T + visitSort?(node: SortNode): T + visitError?(node: ErrorNode): T + } + + // ============================================================================ + // Error Types + // ============================================================================ + + /** + * error codes follow the pattern: + * - S0xxx: static/syntax errors (parse time) + * - T0xxx: type errors + * - D0xxx: dynamic errors (evaluation time) + */ + interface JsonataError extends Error { + /** + * error code identifying the type of error + * @example "S0201" - syntax error + * @example "T2001" - type error (left side must be number) + * @example "D1001" - dynamic error (number out of range) + */ + code: string + /** character position in source where error occurred */ + position: number + /** the token that caused the error */ + token: string + /** additional context value for the error message */ + value?: unknown + /** second context value (for comparison errors) */ + value2?: unknown + } + + // ============================================================================ + // Environment Types + // ============================================================================ + + /** + * execution environment - holds variable bindings during evaluation + */ + interface Environment { + /** bind a value to a name in this environment frame */ + bind(name: string | symbol, value: unknown): void + /** look up a value by name, searching up through parent frames */ + lookup(name: string | symbol): unknown + /** the timestamp captured at start of evaluation (used by $now() and $millis()) */ + readonly timestamp: Date + /** whether this environment supports async operations */ + readonly async: boolean + } + + /** + * focus object passed as `this` to registered functions + */ + interface Focus { + /** the current execution environment */ + readonly environment: Environment + /** the current context value (input at this point in evaluation) */ + readonly input: unknown + } + + // ============================================================================ + // Expression Interface + // ============================================================================ + + /** + * compiled JSONata expression ready for evaluation + */ + interface Expression { + /** + * evaluate the expression against input data + * @param input - the JSON data to query/transform + * @param bindings - optional variable bindings to make available + * @returns promise resolving to the result + */ + evaluate(input: unknown, bindings?: Record): Promise + + /** + * evaluate the expression with a callback + * @param input - the JSON data to query/transform + * @param bindings - optional variable bindings + * @param callback - called with (error, result) + */ + evaluate( + input: unknown, + bindings: Record | undefined, + callback: (err: JsonataError, resp: unknown) => void + ): void + + /** + * bind a value to a variable name in this expression's environment + * @param name - variable name (without $) + * @param value - value to bind + */ + assign(name: string, value: unknown): void + + /** + * register a custom function + * @param name - function name (without $) + * @param implementation - the function implementation + * @param signature - optional type signature for argument validation + * @example + * ```javascript + * expr.registerFunction('double', (x) => x * 2, ''); + * ``` + */ + registerFunction( + name: string, + implementation: (this: Focus, ...args: unknown[]) => unknown, + signature?: string + ): void + + /** + * get the parsed AST for this expression + * useful for static analysis, code generation, or building tools + */ + ast(): ExprNode + + /** + * get any parse errors (only available when recover option was true) + */ + errors(): JsonataError[] | undefined + } + + // ============================================================================ + // Built-in Function Signatures + // ============================================================================ + + /** + * function signature syntax (used in registerFunction and lambda definitions): + * + * signature format: `` + * + * type symbols: + * - `s` = string + * - `n` = number + * - `b` = boolean + * - `o` = object + * - `a` = array (can be parameterized: `a` = array of numbers) + * - `f` = function + * - `x` = any type + * - `j` = JSON (any valid JSON value) + * - `(...)` = choice of types: `(ns)` = number or string + * + * modifiers: + * - `-` = required argument + * - `?` = optional argument + * - `+` = one or more arguments + * + * @example `` = first number required, second optional, returns number + * @example `:n>` = array of numbers in, number out + * @example `` = any type in, boolean out + */ + const builtinFunctions: { + // aggregation functions + /** sum of numbers: $sum([1,2,3]) => 6 */ + sum: ":n>" + /** count items: $count([1,2,3]) => 3 */ + count: "" + /** maximum number: $max([1,2,3]) => 3 */ + max: ":n>" + /** minimum number: $min([1,2,3]) => 1 */ + min: ":n>" + /** arithmetic mean: $average([1,2,3]) => 2 */ + average: ":n>" + + // string functions + /** convert to string: $string(123) => "123" */ + string: "" + /** substring: $substring("hello", 1, 3) => "ell" */ + substring: "" + /** text before delimiter: $substringBefore("hello-world", "-") => "hello" */ + substringBefore: "" + /** text after delimiter: $substringAfter("hello-world", "-") => "world" */ + substringAfter: "" + /** to lowercase: $lowercase("HELLO") => "hello" */ + lowercase: "" + /** to uppercase: $uppercase("hello") => "HELLO" */ + uppercase: "" + /** string length: $length("hello") => 5 */ + length: "" + /** trim whitespace: $trim(" hi ") => "hi" */ + trim: "" + /** pad string: $pad("x", 5, "-") => "--x--" */ + pad: "" + /** regex match: $match("abc", /[a-z]/) */ + match: "n?:a>" + /** contains: $contains("hello", "ell") => true */ + contains: "" + /** replace: $replace("hello", "l", "L") => "heLLo" */ + replace: "" + /** split: $split("a,b,c", ",") => ["a","b","c"] */ + split: ">" + /** join: $join(["a","b","c"], ",") => "a,b,c" */ + join: "s?:s>" + /** format number: $formatNumber(1234.5, "#,##0.00") => "1,234.50" */ + formatNumber: "" + /** format in base: $formatBase(255, 16) => "ff" */ + formatBase: "" + /** format integer: $formatInteger(123, "w") => "one hundred and twenty-three" */ + formatInteger: "" + /** parse integer: $parseInteger("one hundred", "w") => 100 */ + parseInteger: "" + + // numeric functions + /** to number: $number("123") => 123 */ + number: "<(nsb)-:n>" + /** floor: $floor(3.7) => 3 */ + floor: "" + /** ceiling: $ceil(3.2) => 4 */ + ceil: "" + /** round: $round(3.456, 2) => 3.46 */ + round: "" + /** absolute value: $abs(-5) => 5 */ + abs: "" + /** square root: $sqrt(16) => 4 */ + sqrt: "" + /** power: $power(2, 3) => 8 */ + power: "" + /** random 0-1: $random() => 0.7263... */ + random: "<:n>" + + // boolean functions + /** to boolean: $boolean("") => false */ + boolean: "" + /** logical not: $not(true) => false */ + not: "" + /** exists check: $exists(field) => true/false */ + exists: "" + + // array functions + /** append: $append([1,2], [3,4]) => [1,2,3,4] */ + append: "" + /** reverse: $reverse([1,2,3]) => [3,2,1] */ + reverse: "" + /** shuffle: $shuffle([1,2,3]) => [2,3,1] */ + shuffle: "" + /** unique values: $distinct([1,1,2]) => [1,2] */ + distinct: "" + /** sort: $sort([3,1,2]) => [1,2,3] */ + sort: "" + /** zip arrays: $zip([1,2],[3,4]) => [[1,3],[2,4]] */ + zip: "" + + // object functions + /** object keys: $keys({"a":1}) => ["a"] */ + keys: ">" + /** lookup field: $lookup(obj, "key") */ + lookup: "" + /** spread: $spread({"a":1}) => [{"a":1}] */ + spread: ">" + /** merge objects: $merge([{a:1},{b:2}]) => {a:1,b:2} */ + merge: ":o>" + /** iterate: $each(obj, fn) */ + each: "" + /** filter object: $sift(obj, fn) */ + sift: "" + + // higher-order functions + /** map: $map([1,2], fn) */ + map: "" + /** filter: $filter([1,2,3], fn) */ + filter: "" + /** find single: $single([1,2,3], fn) */ + single: "" + /** reduce/fold: $reduce([1,2,3], fn, init) */ + reduce: "" + + // encoding functions + /** base64 encode: $base64encode("hello") => "aGVsbG8=" */ + base64encode: "" + /** base64 decode: $base64decode("aGVsbG8=") => "hello" */ + base64decode: "" + /** URL encode component: $encodeUrlComponent("a b") => "a%20b" */ + encodeUrlComponent: "" + /** URL encode: $encodeUrl("http://a b") */ + encodeUrl: "" + /** URL decode component */ + decodeUrlComponent: "" + /** URL decode */ + decodeUrl: "" + + // date/time functions + /** current ISO timestamp: $now() => "2024-01-15T..." */ + now: "" + /** current milliseconds: $millis() => 1705312800000 */ + millis: "<:n>" + /** parse to millis: $toMillis("2024-01-15T...") */ + toMillis: "" + /** millis to string: $fromMillis(1705312800000) */ + fromMillis: "" + + // other functions + /** evaluate string as expression: $eval("1+2") => 3 */ + eval: "" + /** deep clone: $clone(obj) */ + clone: "<(oa)-:o>" + /** throw error: $error("message") */ + error: "" + /** assertion: $assert(condition, "message") */ + assert: "" + /** get type: $type(value) => "string"|"number"|... */ + type: "" + } + + // ============================================================================ + // Operator Precedence (for reference) + // ============================================================================ + + /** + * operator precedence - higher number = binds tighter + * useful for building parsers or pretty printers + */ + const operatorPrecedence: { + /** path/map operator */ + ".": 75 + /** filter/predicate, array constructor */ + "[": 80 + /** object constructor/grouping */ + "{": 70 + /** function call, grouping */ + "(": 80 + /** focus variable binding: Account@$a.Order */ + "@": 80 + /** index variable binding: Account.Order#$i */ + "#": 80 + /** expression separator in blocks */ + ";": 80 + /** key-value separator */ + ":": 80 + /** conditional operator */ + "?": 20 + /** addition */ + "+": 50 + /** subtraction */ + "-": 50 + /** multiplication */ + "*": 60 + /** division */ + "/": 60 + /** modulo */ + "%": 60 + /** transform pattern delimiter */ + "|": 20 + /** equality */ + "=": 40 + /** less than */ + "<": 40 + /** greater than */ + ">": 40 + /** order-by/sort */ + "^": 40 + /** descendant wildcard */ + "**": 60 + /** range operator */ + "..": 20 + /** variable binding */ + ":=": 10 + /** not equal */ + "!=": 40 + /** less than or equal */ + "<=": 40 + /** greater than or equal */ + ">=": 40 + /** function application/chaining */ + "~>": 40 + /** elvis operator (default if falsy) */ + "?:": 40 + /** null coalescing (default if undefined) */ + "??": 40 + /** boolean AND */ + and: 30 + /** boolean OR */ + or: 25 + /** array inclusion */ + in: 40 + /** string concatenation */ + "&": 50 + } + + // ============================================================================ + // Quick Reference: All Node Types + // ============================================================================ + + /** + * complete list of AST node types produced by the parser: + * + * LITERALS: + * - string: "hello" + * - number: 42 + * - value: true, false, null + * - regex: /pattern/flags + * + * IDENTIFIERS: + * - name: field name (Account, Order, etc.) + * - variable: $x, $, $$ + * + * WILDCARDS: + * - wildcard: * (all fields at this level) + * - descendant: ** (all nested values) + * - parent: % (reference parent context) + * + * PATHS: + * - path: sequence of steps (Account.Order.Product) + * + * BINARY: + * - binary: arithmetic, comparison, boolean, string ops + * - bind: variable assignment (:=) + * - apply: function application (~>) + * + * UNARY: + * - negation: -expr + * - array constructor: [expr, expr] + * - object constructor: {key: value} + * + * FUNCTIONS: + * - function: function call + * - partial: partial application with ? + * - lambda: function definition + * + * CONTROL: + * - condition: ternary ?: and ?:/?? operators + * - block: (expr; expr; expr) + * + * OTHER: + * - transform: |pattern|update,delete| + * - sort: order-by ^(expr) + * - error: parse error (recovery mode) + */ + type AllNodeTypes = + | "string" + | "number" + | "value" + | "regex" + | "name" + | "variable" + | "wildcard" + | "descendant" + | "parent" + | "path" + | "binary" + | "bind" + | "apply" + | "unary" + | "function" + | "partial" + | "lambda" + | "condition" + | "block" + | "transform" + | "sort" + | "error" + } + export default jsonata +} diff --git a/core/lib/server/jsonata-query/jsonquery.db.test.ts b/core/lib/server/jsonata-query/jsonquery.db.test.ts index e5c66e21c8..f3d07c9670 100644 --- a/core/lib/server/jsonata-query/jsonquery.db.test.ts +++ b/core/lib/server/jsonata-query/jsonquery.db.test.ts @@ -1,19 +1,17 @@ /** biome-ignore-all lint/suspicious/noConsole: */ -import { beforeAll, describe, expect, it } from "vitest" +import { describe, expect, it } from "vitest" -import { createQuata, defineSchema, type Quata } from "@pubpub/quata" import { CoreSchemaType, MemberRole } from "db/public" import { mockServerCode } from "~/lib/__tests__/utils" import { createSeed } from "~/prisma/seed/createSeed" - -// import { createLastModifiedBy } from "../lastModifiedBy" +import { compilePubFilter } from "./pubpub-quata" const { createForEachMockedTransaction } = await mockServerCode() const { getTrx } = createForEachMockedTransaction() -const _seed = createSeed({ +const seed = createSeed({ community: { name: "test", slug: "test-server-pub", @@ -86,108 +84,12 @@ const _seed = createSeed({ ], }) -const schema = defineSchema({ - tables: { - pubs: { - fields: { - id: { type: "string", column: "id" }, - title: { type: "string", column: "title" }, - createdAt: { type: "date", column: "createdAt" }, - updatedAt: { type: "date", column: "updatedAt" }, - }, - relations: { - stage: { - target: "stages", - foreignKey: "stageId", - targetKey: "id", - type: "many-to-one", - }, - pubType: { - target: "pub_types", - foreignKey: "pubTypeId", - type: "many-to-one", - targetKey: "id", - }, - community: { - target: "communities", - foreignKey: "communityId", - type: "many-to-one", - targetKey: "id", - }, - values: { - target: "pub_values", - foreignKey: "id", - targetKey: "pubId", - type: "one-to-many", - }, - }, - }, - stages: { - fields: { - id: { type: "string", column: "id" }, - name: { type: "string", column: "name" }, - createdAt: { type: "date", column: "createdAt" }, - updatedAt: { type: "date", column: "updatedAt" }, - }, - }, - pub_types: { - fields: { - id: { type: "string", column: "id" }, - name: { type: "string", column: "name" }, - createdAt: { type: "date", column: "createdAt" }, - updatedAt: { type: "date", column: "updatedAt" }, - }, - }, - communities: { - fields: { - id: { type: "string", column: "id" }, - name: { type: "string", column: "name" }, - createdAt: { type: "date", column: "createdAt" }, - updatedAt: { type: "date", column: "updatedAt" }, - }, - }, - pub_values: { - fields: { - id: { type: "string", column: "id" }, - value: { type: "jsonb", column: "value", nullable: true }, - createdAt: { type: "date", column: "createdAt" }, - updatedAt: { type: "date", column: "updatedAt" }, - relatedPubId: { type: "string", column: "relatedPubId", nullable: true }, - }, - relations: { - field: { - target: "pub_fields", - foreignKey: "fieldId", - targetKey: "id", - type: "many-to-one", - }, - }, - }, - pub_fields: { - fields: { - id: { type: "string", column: "id" }, - name: { type: "string", column: "name" }, - slug: { type: "string", column: "slug" }, - schemaName: { type: "string", column: "schemaName" }, - isRelation: { type: "boolean", column: "isRelation" }, - createdAt: { type: "date", column: "createdAt" }, - updatedAt: { type: "date", column: "updatedAt" }, - }, - }, - }, -}) +type TestCase = [string, string, (results: any[]) => void] -let _quata: Quata - -beforeAll(async () => {}) -type TestCase = - | [string, string, (results: any[]) => void] - | [string, string, (results: any[]) => void, { debug: boolean }] - -describe("jsonata query", () => { +describe("pubpub quata filter", () => { it.for([ [ - "Simple title filter", + "filter by direct title field", "$$pubs[title = 'Some title']", (results) => { expect(results).toHaveLength(1) @@ -195,51 +97,101 @@ describe("jsonata query", () => { }, ], [ - "pubtype", + "filter by pubType.name relation", "$$pubs[pubType.name = 'Basic Pub']", (results) => { - expect(results).toHaveLength(3) - expect(results[0].pubType.name).toBe("Basic Pub") - expect(results[1].pubType.name).toBe("Basic Pub") + // 3 basic pubs (2 top-level + 1 related) + expect(results.length).toBeGreaterThanOrEqual(2) + for (const r of results) { + expect(r.pubTypeId).toBeDefined() + } + }, + ], + [ + "filter by stage.name relation", + "$$pubs[stage.name = 'Stage 1']", + (results) => { + expect(results).toHaveLength(2) }, - { debug: true }, ], [ - "pub values", - `$$pubs[values.value = '"Some title"']`, + "filter by values.Title (shorthand expansion)", + "$$pubs[values.Title = 'Some title']", (results) => { expect(results).toHaveLength(1) - console.log(results[0]) - expect(results[0].values[0].value).toBe("Some title") + expect(results[0].title).toBe("Some title") }, - { debug: true }, ], - [ - "pub values better", - "$$pubs[$contains(values.description, 'description')].{ title: $.title, description: $.values.description }", + "$contains on values.Description", + "$$pubs[$exists(values.description)]", + (results) => { + expect(results).toHaveLength(1) + expect(results[0].title).toBe("Another title") + }, + ], + [ + "combined filter: values and direct field", + "$$pubs[values.Title = 'Some title' and title = 'Some title']", (results) => { expect(results).toHaveLength(1) expect(results[0].title).toBe("Some title") - expect(results[0].description).toBe("Some description") }, - { debug: true }, ], - ] satisfies TestCase[])("%s", async ([title, expression, expected, options]) => { + [ + "filter with projection expression ignores projection", + '$$pubs[values.Title = "Some title" and title = "Some title"].{ "title": $.title }', + (results) => { + // compilePubFilter only applies the filter part + // projection is handled in-memory by post-fetch-projection + expect(results).toHaveLength(1) + expect(results[0].title).toBe("Some title") + }, + ], + ] satisfies TestCase[])("%s", async ([_title, expression, expected]) => { const { seedCommunity } = await import("~/prisma/seed/seedCommunity") const trx = getTrx() - const _community = await seedCommunity(_seed, undefined, trx) + const community = await seedCommunity(seed, undefined, trx) - const quata = createQuata(schema, trx) - const query = quata.compile(expression) - if (options?.debug) { - console.log("AAAAAAAAAAAAAA") - console.log(query.sql) - } - const queryBuilder = query.toQueryBuilder() - const resultq = queryBuilder.where("t0.communityId", "=", _community.community.id) + const filter = compilePubFilter(expression, { + communitySlug: community.community.slug, + }) + + // apply the filter directly to a pubs query + const results = await trx + .selectFrom("pubs") + .selectAll() + .where((eb) => filter.apply(eb, "pubs")) + .where("pubs.communityId", "=", community.community.id) + .execute() - const results = await resultq.execute() expected(results) }) }) + +describe.only("on pubs", () => { + it("can filter by quata expression", async () => { + const { seedCommunity } = await import("~/prisma/seed/seedCommunity") + const trx = getTrx() + const community = await seedCommunity(seed, undefined, trx) + const { getPubsWithRelatedValues } = await import("../pub") + + const results = await getPubsWithRelatedValues( + { + communityId: community.community.id, + }, + { + quataExpression: { + expression: `$$pubs[values['some-relation'].relatedPub.title = 'A pub related to another Pub']`, + communitySlug: community.community.slug, + }, + } + ) + + console.log(results.map((r) => r.values)) + expect(results).toHaveLength(1) + expect(results[0].values.find((v) => v.fieldSlug.includes("some-relation"))?.value).toBe( + "test relation value" + ) + }) +}) diff --git a/core/lib/server/jsonata-query/post-fetch-projection.ts b/core/lib/server/jsonata-query/post-fetch-projection.ts new file mode 100644 index 0000000000..7ed5909599 --- /dev/null +++ b/core/lib/server/jsonata-query/post-fetch-projection.ts @@ -0,0 +1,40 @@ +// post-fetch projection for quata +// evaluates jsonata projection expressions in-memory against fetched pubs +// uses the same pub proxy shape as all other jsonata evaluation points + +import type { ProcessedPub } from "contracts" + +import { interpolate } from "@pubpub/json-interpolate" + +import { createPubProxy } from "~/actions/_lib/pubProxy" + +// apply a jsonata projection expression to a list of fetched pubs +// each pub is wrapped in the pub proxy before evaluation, so the expression +// can use the standard pub proxy paths: values.fieldSlug, out.relSlug, etc. +export async function applyProjection( + pubs: ProcessedPub[], + projectionExpression: string, + communitySlug: string +): Promise { + const results: T[] = [] + + for (const pub of pubs) { + const proxy = createPubProxy(pub, communitySlug) + const result = await interpolate(projectionExpression, proxy) + results.push(result as T) + } + + return results +} + +// apply a jsonata expression to a single pub +// useful for interpolation contexts where the output is a single value +export async function evaluateOnPub( + pub: ProcessedPub, + expression: string, + communitySlug: string +): Promise { + const proxy = createPubProxy(pub, communitySlug) + const result = await interpolate(expression, proxy) + return result as T +} diff --git a/core/lib/server/jsonata-query/pubpub-quata.ts b/core/lib/server/jsonata-query/pubpub-quata.ts new file mode 100644 index 0000000000..f99a9140be --- /dev/null +++ b/core/lib/server/jsonata-query/pubpub-quata.ts @@ -0,0 +1,589 @@ +// pubpub-specific quata integration +// compiles jsonata filter expressions to sql conditions for getPubsWithRelatedValues +// +// handles pubpub-specific patterns: +// - values.fieldSlug -> EXISTS subquery on pub_values + pub_fields +// - pubType.name -> JOIN to pub_types +// - stage.name -> JOIN through PubsInStages to stages +// - direct fields (title, createdAt) -> column references on pubs + +import type { ExprNode } from "@pubpub/quata" +import type { ExpressionBuilder, ExpressionWrapper } from "kysely" + +import { sql } from "kysely" + +import { parseExpression } from "@pubpub/quata" + +// a compiled filter that can be applied to a kysely expression builder +export interface CompiledPubFilter { + // apply this filter as a WHERE condition + apply: ( + eb: ExpressionBuilder, + pubTableRef: string + ) => ExpressionWrapper + // the original expression (after shorthand expansion) + expandedExpression: string + // extracted sort/limit info + orderBy: Array<{ field: string; direction: "asc" | "desc" }> | null + limit: number | null + offset: number | null +} + +// the fields directly on the pubs table +const DIRECT_PUB_FIELDS = new Set([ + "id", + "title", + "createdAt", + "updatedAt", + "communityId", + "pubTypeId", +]) + +export interface PubPubQuataOptions { + communitySlug: string +} + +// compile a jsonata filter expression into a sql condition for pubs +export function compilePubFilter( + expression: string, + options: PubPubQuataOptions +): CompiledPubFilter { + const expanded = expandShorthands(expression, options.communitySlug) + const ast = parseExpression(expanded) + + // extract the filter, sort, and limit parts from the ast + const { filterAst, orderBy, limit, offset } = extractQueryParts(ast) + + return { + expandedExpression: expanded, + orderBy, + limit, + offset, + apply: (eb, pubTableRef) => { + if (!filterAst) { + return eb.val(true) as any + } + return translateFilterAst(eb, filterAst, pubTableRef, options.communitySlug) + }, + } +} + +// expand user-facing shorthands to valid jsonata +// values.fieldSlug -> values[field.slug = 'communitySlug:fieldSlug'].value +// values['field-slug'] -> values[field.slug = 'communitySlug:field-slug'].value +// this keeps the expression valid jsonata for frontend preview +function expandShorthands(expression: string, communitySlug: string): string { + // dot notation: values.fieldSlug (not followed by . or [ or () + // field slugs are lowercased by slugifyString, so we lowercase the match + let result = expression.replace( + /values\.([a-zA-Z_][a-zA-Z0-9_]*)\b(?!\s*[.[(])/g, + (_match, fieldSlug) => + `values[field.slug = '${communitySlug}:${fieldSlug.toLowerCase()}'].value` + ) + + // bracket notation: values['field-slug'] or values["field-slug"] + // this handles slugs with dashes or other non-identifier characters + result = result.replace( + /values\[['"]([^'"]+)['"]\]/g, + (_match, fieldSlug) => + `values[field.slug = '${communitySlug}:${fieldSlug.toLowerCase()}'].value` + ) + + return result +} + +// extract the different query parts from a quata-style expression +// $$pubs[filter]^(>field)[[0..9]] -> { filterAst, orderBy, limit, offset } +function extractQueryParts(ast: ExprNode): { + filterAst: ExprNode | null + orderBy: Array<{ field: string; direction: "asc" | "desc" }> | null + limit: number | null + offset: number | null +} { + let filterAst: ExprNode | null = null + let orderBy: Array<{ field: string; direction: "asc" | "desc" }> | null = null + let limit: number | null = null + let offset: number | null = null + + // handle path expression (most common: $$pubs[filter]^(sort)[[limit]]) + if (ast.type === "path") { + const pathNode = ast as unknown as { steps: ExprNode[] } + for (const step of pathNode.steps) { + if (step.type === "variable") { + const varNode = step as unknown as { + value: string + predicate?: Array<{ type: string; expr?: ExprNode }> + } + if (varNode.predicate) { + for (const pred of varNode.predicate) { + if (pred.type !== "filter" || !pred.expr) continue + const parsed = parseLimitOrFilter(pred.expr) + if (parsed.type === "limit") { + limit = parsed.limit + offset = parsed.offset + } else { + filterAst = combineFilters(filterAst, pred.expr) + } + } + } + } + + if (step.type === "sort") { + const sortNode = step as unknown as { + terms: Array<{ expression: ExprNode; descending: boolean }> + stages?: Array<{ type: string; expr?: ExprNode }> + } + orderBy = sortNode.terms.map((term) => ({ + field: extractFieldName(term.expression), + direction: term.descending ? ("desc" as const) : ("asc" as const), + })) + if (sortNode.stages) { + for (const stage of sortNode.stages) { + if (stage.type !== "filter" || !stage.expr) continue + const parsed = parseLimitOrFilter(stage.expr) + if (parsed.type === "limit") { + limit = parsed.limit + offset = parsed.offset + } + } + } + } + } + return { filterAst, orderBy, limit, offset } + } + + // handle simple variable expression: $$pubs[filter] + if (ast.type === "variable") { + const varNode = ast as unknown as { + value: string + predicate?: Array<{ type: string; expr?: ExprNode }> + } + if (varNode.predicate) { + for (const pred of varNode.predicate) { + if (pred.type !== "filter" || !pred.expr) continue + const parsed = parseLimitOrFilter(pred.expr) + if (parsed.type === "limit") { + limit = parsed.limit + offset = parsed.offset + } else { + filterAst = combineFilters(filterAst, pred.expr) + } + } + } + } + + return { filterAst, orderBy, limit, offset } +} + +function parseLimitOrFilter( + expr: ExprNode +): { type: "limit"; limit: number; offset: number | null } | { type: "filter" } { + if (expr.type === "number") { + const idx = (expr as unknown as { value: number }).value + return { type: "limit", limit: 1, offset: idx > 0 ? idx : null } + } + if (expr.type === "unary") { + const unary = expr as unknown as { value: string; expressions?: ExprNode[] } + if (unary.value === "[" && unary.expressions?.length === 1) { + const range = unary.expressions[0] as unknown as { + type: string + value: string + lhs?: { value: number } + rhs?: { value: number } + } + if (range.type === "binary" && range.value === "..") { + const start = range.lhs?.value ?? 0 + const end = range.rhs?.value ?? 0 + return { + type: "limit", + limit: end - start + 1, + offset: start > 0 ? start : null, + } + } + } + } + return { type: "filter" } +} + +function combineFilters(existing: ExprNode | null, newFilter: ExprNode): ExprNode { + if (!existing) return newFilter + // create a synthetic AND node + return { + type: "binary", + value: "and", + position: 0, + lhs: existing, + rhs: newFilter, + } as unknown as ExprNode +} + +function extractFieldName(expr: ExprNode): string { + if (expr.type === "name") { + return (expr as unknown as { value: string }).value + } + if (expr.type === "path") { + const pathNode = expr as unknown as { steps: ExprNode[] } + return pathNode.steps.map((s) => (s as unknown as { value: string }).value).join(".") + } + return "unknown" +} + +// translate a filter ast node to a kysely expression +function translateFilterAst( + eb: ExpressionBuilder, + node: ExprNode, + pubRef: string, + communitySlug: string +): ExpressionWrapper { + const n = node as unknown as Record + + if (node.type === "binary") { + return translateBinaryFilter(eb, n, pubRef, communitySlug) + } + + if (node.type === "function") { + return translateFunctionFilter(eb, n, pubRef, communitySlug) + } + + if (node.type === "unary" && n.value === "-") { + // negation + const inner = translateFilterAst(eb, n.expression, pubRef, communitySlug) + return eb.not(inner) as ExpressionWrapper + } + + // fallback: treat as truthy + return eb.val(true) as any +} + +function translateBinaryFilter( + eb: ExpressionBuilder, + node: Record, + pubRef: string, + communitySlug: string +): ExpressionWrapper { + const op = node.value as string + + // boolean logic + if (op === "and") { + const left = translateFilterAst(eb, node.lhs, pubRef, communitySlug) + const right = translateFilterAst(eb, node.rhs, pubRef, communitySlug) + return eb.and([left, right]) as ExpressionWrapper + } + if (op === "or") { + const left = translateFilterAst(eb, node.lhs, pubRef, communitySlug) + const right = translateFilterAst(eb, node.rhs, pubRef, communitySlug) + return eb.or([left, right]) as ExpressionWrapper + } + + // comparison operators + if (["=", "!=", "<", "<=", ">", ">=", "in"].includes(op)) { + return translateComparison(eb, node.lhs, op, node.rhs, pubRef, communitySlug) + } + + return eb.val(true) as any +} + +// the core comparison translator +// dispatches based on whether the left side is a direct field, value access, or relation path +function translateComparison( + eb: ExpressionBuilder, + lhs: Record, + op: string, + rhs: Record, + pubRef: string, + communitySlug: string +): ExpressionWrapper { + const leftPath = resolvePath(lhs) + const rightValue = resolveValue(rhs) + + if (!leftPath) { + return eb.val(true) as any + } + + // value access pattern: values[field.slug = '...'].value + if (leftPath.type === "value_access") { + return buildValueExistsSubquery(eb, leftPath.fieldSlug, op, rightValue, pubRef) + } + + // relation path: pubType.name, stage.name, etc. + if (leftPath.type === "relation") { + return buildRelationCondition(eb, leftPath.relation, leftPath.field, op, rightValue, pubRef) + } + + // direct field on pubs table + if (leftPath.type === "direct") { + const sqlOp = mapOperator(op) + const ref = sql.ref(`${pubRef}.${leftPath.field}`) + if (rightValue === null) { + return op === "=" + ? (eb(ref as any, "is", null) as any) + : (eb(ref as any, "is not", null) as any) + } + return eb(ref as any, sqlOp as any, rightValue) as any + } + + return eb.val(true) as any +} + +type ResolvedPath = + | { type: "direct"; field: string } + | { type: "value_access"; fieldSlug: string } + | { type: "relation"; relation: string; field: string } + +// resolve a path expression to understand what it references +function resolvePath(node: Record): ResolvedPath | null { + console.dir(node, { depth: null }) + // simple name node: title, createdAt, etc. + if (node.type === "name") { + const name = node.value as string + if (DIRECT_PUB_FIELDS.has(name)) { + return { type: "direct", field: name } + } + return null + } + + // path expression: pubType.name, values[...].value, stage.name + if (node.type === "path") { + const steps = node.steps as Array> + if (steps.length === 0) return null + + const firstName = steps[0]?.value as string | undefined + if (!firstName) return null + + // detect values[field.slug = '...'].value pattern + // this is what expandShorthands produces from values.fieldSlug + // jsonata stores filters as "stages" on name nodes inside paths + if (firstName === "values" && (steps[0]?.stages || steps[0]?.predicate)) { + const filterSource = steps[0].stages ?? steps[0].predicate + const fieldSlug = extractFieldSlugFromPredicate(filterSource) + if (fieldSlug) { + return { type: "value_access", fieldSlug } + } + } + + // detect relation paths like pubType.name, stage.name + if (steps.length === 2 && steps[1]?.type === "name") { + const relationName = firstName + const fieldName = steps[1].value as string + + if (DIRECT_PUB_FIELDS.has(relationName)) { + // something like id.something - not a relation + return null + } + + return { type: "relation", relation: relationName, field: fieldName } + } + + // single step path that's a direct field + if (steps.length === 1 && DIRECT_PUB_FIELDS.has(firstName)) { + return { type: "direct", field: firstName } + } + } + + // variable reference like $.field (in projection context) + if (node.type === "variable" && node.value === "") { + // $ by itself, check for stages + return null + } + + return null +} + +// extract the field slug from a values[field.slug = '...'] or values['slug'] predicate +function extractFieldSlugFromPredicate(predicates: Array>): string | null { + for (const pred of predicates) { + if (pred.type !== "filter" || !pred.expr) continue + const expr = pred.expr + + // expanded form: field.slug = 'communitySlug:someSlug' + if (expr.type === "binary" && expr.value === "=") { + const lhs = expr.lhs + const rhs = expr.rhs + + if (lhs?.type === "path") { + const steps = lhs.steps as Array> + if ( + steps.length === 2 && + steps[0]?.value === "field" && + steps[1]?.value === "slug" + ) { + if (rhs?.type === "string") { + return rhs.value as string + } + } + } + } + + // bracket notation fallback: values['slug'] parses as a string filter + // the string is treated as a field slug (without community prefix) + if (expr.type === "string") { + return expr.value as string + } + } + return null +} + +// resolve the right-hand side of a comparison to a value +function resolveValue(node: Record): unknown { + if (node.type === "string") return node.value + if (node.type === "number") return node.value + if (node.type === "value" && node.value === true) return true + if (node.type === "value" && node.value === false) return false + if (node.type === "value" && node.value === null) return null + return null +} + +// build an EXISTS subquery for value access +// matches the pattern from pub-filters.ts +function buildValueExistsSubquery( + eb: ExpressionBuilder, + fieldSlug: string, + op: string, + value: unknown, + pubRef: string +): ExpressionWrapper { + const sqlOp = mapOperator(op) + + // jsonb values need stringification for string comparisons + const sqlValue = typeof value === "string" ? JSON.stringify(value) : value + + // use `as any` to bypass kysely's strict generic type inference + // on dynamically constructed subqueries + const subquery = (eb as any) + .selectFrom("pub_values") + .innerJoin("pub_fields", "pub_fields.id", "pub_values.fieldId") + .select(sql.lit(1).as("exists_check")) + .where("pub_values.pubId", "=", sql.ref(`${pubRef}.id`)) + .where("pub_fields.slug", "=", fieldSlug) + .where("pub_values.value", sqlOp, sqlValue) + + return eb.exists(subquery) as ExpressionWrapper +} + +// build a condition through a relation +function buildRelationCondition( + eb: ExpressionBuilder, + relation: string, + field: string, + op: string, + value: unknown, + pubRef: string +): ExpressionWrapper { + const sqlOp = mapOperator(op) + const ebi = eb as any + + // pubType -> join pub_types via pubTypeId + if (relation === "pubType") { + const subquery = ebi + .selectFrom("pub_types") + .select(sql.lit(1).as("exists_check")) + .where("pub_types.id", "=", sql.ref(`${pubRef}.pubTypeId`)) + .where(`pub_types.${field}`, sqlOp, value) + return eb.exists(subquery) as ExpressionWrapper + } + + // stage -> join through PubsInStages to stages + if (relation === "stage") { + const subquery = ebi + .selectFrom("PubsInStages") + .innerJoin("stages", "stages.id", "PubsInStages.stageId") + .select(sql.lit(1).as("exists_check")) + .where("PubsInStages.pubId", "=", sql.ref(`${pubRef}.id`)) + .where(`stages.${field}`, sqlOp, value) + return eb.exists(subquery) as ExpressionWrapper + } + + // community -> join communities via communityId + if (relation === "community") { + const subquery = ebi + .selectFrom("communities") + .select(sql.lit(1).as("exists_check")) + .where("communities.id", "=", sql.ref(`${pubRef}.communityId`)) + .where(`communities.${field}`, sqlOp, value) + return eb.exists(subquery) as ExpressionWrapper + } + + return eb.val(true) as any +} + +function translateFunctionFilter( + eb: ExpressionBuilder, + node: Record, + pubRef: string, + communitySlug: string +): ExpressionWrapper { + const funcName = (node.procedure?.value ?? node.value) as string + const args = (node.arguments ?? []) as Array> + + // $contains(path, pattern) -> ILIKE / text search + if (funcName === "contains" && args.length === 2) { + const leftPath = resolvePath(args[0]) + const pattern = resolveValue(args[1]) + const ebi = eb as any + + if (leftPath?.type === "value_access" && typeof pattern === "string") { + const subquery = ebi + .selectFrom("pub_values") + .innerJoin("pub_fields", "pub_fields.id", "pub_values.fieldId") + .select(sql.lit(1).as("exists_check")) + .where("pub_values.pubId", "=", sql.ref(`${pubRef}.id`)) + .where("pub_fields.slug", "=", leftPath.fieldSlug) + .where(sql.raw(`"pub_values"."value"::text`), "ilike", `%${pattern}%`) + return eb.exists(subquery) as ExpressionWrapper + } + + if (leftPath?.type === "direct" && typeof pattern === "string") { + const ref = sql.ref(`${pubRef}.${leftPath.field}`) + return ebi(ref, "ilike", `%${pattern}%`) as ExpressionWrapper + } + } + + // $exists(path) -> IS NOT NULL check + if (funcName === "exists" && args.length === 1) { + const leftPath = resolvePath(args[0]) + const ebi = eb as any + if (leftPath?.type === "direct") { + const ref = sql.ref(`${pubRef}.${leftPath.field}`) + return ebi(ref, "is not", null) as ExpressionWrapper + } + if (leftPath?.type === "value_access") { + const subquery = ebi + .selectFrom("pub_values") + .innerJoin("pub_fields", "pub_fields.id", "pub_values.fieldId") + .select(sql.lit(1).as("exists_check")) + .where("pub_values.pubId", "=", sql.ref(`${pubRef}.id`)) + .where("pub_fields.slug", "=", leftPath.fieldSlug) + .where("pub_values.value", "is not", null) + return eb.exists(subquery) as ExpressionWrapper + } + } + + // $not(expr) -> NOT + if (funcName === "not" && args.length === 1) { + const inner = translateFilterAst(eb, args[0] as ExprNode, pubRef, communitySlug) + return eb.not(inner) as ExpressionWrapper + } + + return eb.val(true) as any +} + +function mapOperator(op: string): string { + switch (op) { + case "=": + return "=" + case "!=": + return "!=" + case "<": + return "<" + case "<=": + return "<=" + case ">": + return ">" + case ">=": + return ">=" + case "in": + return "in" + default: + return "=" + } +} diff --git a/core/lib/server/pub.ts b/core/lib/server/pub.ts index afc9a6a56a..ade23cbab2 100644 --- a/core/lib/server/pub.ts +++ b/core/lib/server/pub.ts @@ -1,3 +1,4 @@ +/** biome-ignore-all lint/style/noNonNullAssertion: */ import type { CreatePubRequestBodyWithNullsNew, Filter, @@ -61,6 +62,7 @@ import { findRanksBetween } from "../rank" import { autoCache } from "./cache/autoCache" import { autoRevalidate } from "./cache/autoRevalidate" import { BadRequestError, NotFoundError } from "./errors" +import { compilePubFilter } from "./jsonata-query/pubpub-quata" import { maybeWithTrx } from "./maybeWithTrx" import { applyFilters } from "./pub-filters" import { _getPubFields } from "./pubFields" @@ -1237,6 +1239,13 @@ export interface GetPubsWithRelatedValuesOptions onlyTitles?: boolean trx?: typeof db filters?: Filter + /** + * a quata/jsonata expression for filtering pubs + * uses the pubpub-quata compiler to generate sql conditions + * supports: values.fieldSlug, pubType.name, stage.name, direct fields + * communitySlug is required for resolving value field shorthands + */ + quataExpression?: { expression: string; communitySlug: string } /** * Constraints on which pub types the user/token has access to. Will also filter related pubs. */ @@ -1728,10 +1737,16 @@ export async function getPubsWithRelatedValues qb.where("pubs.pubTypeId", "in", allowedPubTypes!) ) - // pub value filter + // pub value filter (structured filter DSL) .$if(Boolean(options?.filters), (qb) => qb.where((eb) => applyFilters(eb, options!.filters!)) ) + // quata expression filter (jsonata-based) + .$if(Boolean(options?.quataExpression), (qb) => { + const { expression, communitySlug } = options!.quataExpression! + const compiled = compilePubFilter(expression, { communitySlug }) + return qb.where((eb) => compiled.apply(eb, "pubs")) + }) .$if(Boolean(orderBy), (qb) => qb.orderBy(orderBy!, orderDirection ?? "desc")) .$if(Boolean(limit), (qb) => qb.limit(limit!)) .$if(Boolean(offset), (qb) => qb.offset(offset!)) diff --git a/core/package.json b/core/package.json index 83fd189806..8e75c1f9b6 100644 --- a/core/package.json +++ b/core/package.json @@ -40,6 +40,7 @@ "reset-base": "PRISMA_SCHEMA_DISABLE_ADVISORY_LOCK=true dotenv -e .env.local -e .env.development prisma migrate reset -- --preview-feature --force | pino-pretty", "reset": "pnpm reset-base && pnpm clear-cache", "test": "SKIP_VALIDATION=true vitest --logHeapUsage", + "test-no-reset": "SKIP_VALIDATION=true SKIP_RESET=true vitest", "test-run": "SKIP_VALIDATION=true vitest run --logHeapUsage", "test-run-no-reset": "SKIP_VALIDATION=true SKIP_RESET=true vitest run", "test-run-with-jobs": "pnpm exec concurrently \"pnpm --filter jobs dev\" \"pnpm --filter core test-run\" --success=first -k", @@ -77,6 +78,7 @@ "@opentelemetry/auto-instrumentations-node": "catalog:", "@prisma/client": "5.19.1", "@pubpub/json-interpolate": "workspace:*", + "@pubpub/quata": "workspace:*", "@react-email/render": "^1.2.0", "@sentry/nextjs": "catalog:", "@sinclair/typebox": "catalog:", diff --git a/packages/quata/package.json b/packages/quata/package.json index 168c8eecd8..3ced3c33ce 100644 --- a/packages/quata/package.json +++ b/packages/quata/package.json @@ -1,9 +1,9 @@ { - "name": "@pubpub/jsonata-querying", + "name": "@pubpub/quata", "type": "module", "version": "0.0.1", "exports": { - ".": "./dist/pubpub-jsonata-querying.js", + ".": "./dist/pubpub-quata.js", "./package.json": "./package.json" }, "scripts": { @@ -27,7 +27,9 @@ "vitest": "catalog:" }, "preconstruct": { - "entrypoints": ["index.ts"], + "entrypoints": [ + "index.ts" + ], "exports": true, "___experimentalFlags_WILL_CHANGE_IN_PATCH": { "typeModule": true, diff --git a/packages/quata/src/ast-cache.ts b/packages/quata/src/ast-cache.ts new file mode 100644 index 0000000000..0816d7e8c2 --- /dev/null +++ b/packages/quata/src/ast-cache.ts @@ -0,0 +1,40 @@ +// ast caching layer for jsonata expressions +// jsonata(expression).ast() is expensive (~100-1000ms per call) +// this module caches parsed ASTs keyed by expression string + +import type { ExprNode } from "./jsonata.overrides.js" + +import jsonata from "jsonata" + +const MAX_CACHE_SIZE = 256 + +const cache = new Map() + +export function parseExpression(expression: string): ExprNode { + const cached = cache.get(expression) + if (cached) { + return cached + } + + const ast = jsonata(expression).ast() as ExprNode + + // simple eviction: clear half the cache when it gets too large + if (cache.size >= MAX_CACHE_SIZE) { + const entries = Array.from(cache.keys()) + for (let i = 0; i < entries.length / 2; i++) { + cache.delete(entries[i]) + } + } + + cache.set(expression, ast) + return ast +} + +// exposed for testing +export function clearAstCache(): void { + cache.clear() +} + +export function getAstCacheSize(): number { + return cache.size +} diff --git a/packages/quata/src/index.ts b/packages/quata/src/index.ts index 35c7736aef..85a7a57155 100644 --- a/packages/quata/src/index.ts +++ b/packages/quata/src/index.ts @@ -24,9 +24,15 @@ export type { Quata, QuataOptions, QuataSchema, + QueryParts, TableSchema, TranslationContext, } from "./quata.js" +export type { + FieldsFromKysely, + KyselyTableNames, + SchemaBuilder, +} from "./schema/from-kysely.js" export type { FieldDefinition, FieldNames, @@ -39,6 +45,8 @@ export type { ValidationError, ValidationResult } from "./subset-validator.js" export type { BindingEntry, KyselyRef } from "./translator/context.js" export type { TranslationResult } from "./translator/expression.js" +// ast caching +export { clearAstCache, getAstCacheSize, parseExpression } from "./ast-cache.js" // function mapping (for reference) export { getFunctionMapping, isFunctionSupported } from "./function-mapping.js" // node classification (for reference) @@ -49,6 +57,18 @@ export { } from "./node-classification.js" // core api export { createQuata, TranslationError } from "./quata.js" +// schema from kysely types +export { + booleanField, + createSchemaBuilder, + dateField, + defineTableFromKysely, + field, + jsonbField, + numberField, + relation, + stringField, +} from "./schema/from-kysely.js" // schema definition export { defineSchema, diff --git a/packages/quata/src/quata.ts b/packages/quata/src/quata.ts index f71082c330..a2803420bc 100644 --- a/packages/quata/src/quata.ts +++ b/packages/quata/src/quata.ts @@ -4,11 +4,11 @@ import type { ExprNode, PathNode, SortNode } from "./jsonata.overrides.js" import type { QuataSchema, TableSchema } from "./schema/types.js" -import jsonata from "jsonata" import { type Kysely, type RawBuilder, type SelectQueryBuilder, sql } from "kysely" +import { parseExpression } from "./ast-cache.js" import { normalizeSchema } from "./schema/types.js" -import { isValid, validateExpression } from "./subset-validator.js" +import { validateExpression } from "./subset-validator.js" import { createContext, generateAlias, type TranslationContext } from "./translator/context.js" import { resultToSql, TranslationError, translateExpression } from "./translator/expression.js" @@ -18,6 +18,30 @@ export interface QuataOptions { db: Kysely> } +// extracted query parts for integration with existing queries +export interface QueryParts { + // the table name and alias + table: { name: string; alias: string } | null + // WHERE conditions as raw sql builders + filters: RawBuilder[] + // ORDER BY clauses + orderBy: Array<{ column: string; direction: "asc" | "desc" }> + // LIMIT value + limit: number | undefined + // OFFSET value + offset: number | undefined + // projection field expressions (key -> sql expression) + projection: Array<{ key: string; sql: RawBuilder }> | null + // joins needed for relation traversal + joins: Array<{ + table: string + alias: string + sourceAlias: string + foreignKey: string + targetKey: string + }> +} + // a compiled query ready for execution export interface CompiledQuery { // the generated sql query string @@ -28,6 +52,8 @@ export interface CompiledQuery { execute: (params?: Record) => Promise // get the kysely query builder (for further modification) toQueryBuilder: () => SelectQueryBuilder, string, T> + // get the extracted query parts for integration + getParts: () => QueryParts } // the main quata instance @@ -71,17 +97,17 @@ export function createQuata( expression: string, params?: Record ): CompiledQuery { - // validate the expression first - if (!isValid(expression)) { - const validation = validateExpression(expression) + // parse the expression to ast (cached) + const ast = parseExpression(expression) + + // validate the ast + const validation = validateExpression(expression) + if (!validation.valid) { throw new Error( `invalid expression: ${validation.errors.map((e) => e.message).join(", ")}` ) } - // parse the expression to ast - const ast = jsonata(expression).ast() as ExprNode - // create translation context const ctx = createContext({ schema: normalizedSchema, @@ -95,9 +121,20 @@ export function createQuata( // compile to sql const compiled = query.compile() + // extract query parts for integration + const extractParts = (): QueryParts => { + const partsCtx = createContext({ + schema: normalizedSchema, + parameters: params ?? {}, + db, + }) + return extractQueryParts(ast, partsCtx) + } + return { sql: compiled.sql, parameters: compiled.parameters as unknown[], + getParts: extractParts, execute: async (runtimeParams?: Record) => { if (runtimeParams) { // merge runtime params with compile-time params @@ -603,6 +640,183 @@ function applyProjection( return q } +// extract query parts without building the full query +// useful for integrating filters/ordering into existing queries +function extractQueryParts(ast: ExprNode, ctx: TranslationContext): QueryParts { + // handle $$table expressions + if (ast.type === "variable") { + const varNode = ast as unknown as { + value: string + predicate?: Array<{ type: string; expr?: ExprNode }> + } + + if (varNode.value.startsWith("$")) { + const tableName = varNode.value.slice(1) + const tableSchema = ctx.schema.tables[tableName] + if (!tableSchema) { + return { + table: null, + filters: [], + orderBy: [], + limit: undefined, + offset: undefined, + projection: null, + joins: [], + } + } + + const tableAlias = generateAlias(ctx) + ctx.currentTable = tableName + ctx.currentTableAlias = tableAlias + + const filters: RawBuilder[] = [] + let limitValue: number | undefined + let offsetValue: number | undefined + + const originalTable = ctx.currentTable + const originalAlias = ctx.currentTableAlias + + if (varNode.predicate) { + for (const pred of varNode.predicate) { + if (pred.type === "filter" && pred.expr) { + if (pred.expr.type === "number") { + const idx = (pred.expr as unknown as { value: number }).value + limitValue = 1 + if (idx > 0) offsetValue = idx + } else if (pred.expr.type === "unary") { + const unaryExpr = pred.expr as unknown as { + value: string + expressions?: ExprNode[] + } + if (unaryExpr.value === "[" && unaryExpr.expressions?.length === 1) { + const rangeExpr = unaryExpr.expressions[0] as unknown as { + type: string + value: string + lhs?: { value: number } + rhs?: { value: number } + } + if (rangeExpr.type === "binary" && rangeExpr.value === "..") { + const start = rangeExpr.lhs?.value ?? 0 + const end = rangeExpr.rhs?.value ?? 0 + limitValue = end - start + 1 + if (start > 0) offsetValue = start + } + } + } else { + ctx.currentTable = originalTable + ctx.currentTableAlias = originalAlias + const result = translateExpression(pred.expr, ctx) + filters.push(resultToSql(result, ctx)) + } + } + } + } + + ctx.currentTable = originalTable + ctx.currentTableAlias = originalAlias + + // collect joins + const joins = Array.from(ctx.pendingJoins.values()).map((j) => { + const targetTable = ctx.schema.tables[j.targetTableName] + return { + table: targetTable?.table ?? j.targetTableName, + alias: j.targetAlias, + sourceAlias: j.sourceAlias, + foreignKey: j.relation.foreignKey, + targetKey: j.relation.targetKey, + } + }) + + return { + table: { name: tableSchema.table, alias: tableAlias }, + filters, + orderBy: [], + limit: limitValue, + offset: offsetValue, + projection: null, + joins, + } + } + } + + // handle path expressions + if (ast.type === "path") { + const pathNode = ast as unknown as PathNode + const analysis = analyzePathExpression(pathNode, ctx) + + if (!analysis.tableName) { + return { + table: null, + filters: [], + orderBy: [], + limit: undefined, + offset: undefined, + projection: null, + joins: [], + } + } + + const tableSchema = ctx.schema.tables[analysis.tableName] + + // update context for projection extraction + ctx.currentTable = analysis.tableName + ctx.currentTableAlias = analysis.tableAlias + + // extract projection expressions + let projectionParts: Array<{ key: string; sql: RawBuilder }> | null = null + if (analysis.projection) { + const originalTable = ctx.currentTable + const originalAlias = ctx.currentTableAlias + projectionParts = [] + + for (const [key, valueExpr] of analysis.projection) { + ctx.currentTable = originalTable + ctx.currentTableAlias = originalAlias + const result = translateExpression(valueExpr, ctx) + projectionParts.push({ key, sql: resultToSql(result, ctx) }) + } + + ctx.currentTable = originalTable + ctx.currentTableAlias = originalAlias + } + + // collect joins + const joins = Array.from(ctx.pendingJoins.values()).map((j) => { + const targetTable = ctx.schema.tables[j.targetTableName] + return { + table: targetTable?.table ?? j.targetTableName, + alias: j.targetAlias, + sourceAlias: j.sourceAlias, + foreignKey: j.relation.foreignKey, + targetKey: j.relation.targetKey, + } + }) + + return { + table: tableSchema + ? { name: tableSchema.table, alias: analysis.tableAlias ?? "t0" } + : null, + filters: analysis.whereConditions, + orderBy: analysis.orderBy, + limit: analysis.limit, + offset: analysis.offset, + projection: projectionParts, + joins, + } + } + + // fallback for other ast types + return { + table: null, + filters: [], + orderBy: [], + limit: undefined, + offset: undefined, + projection: null, + joins: [], + } +} + // re-export types and utilities export { TranslationError } export type { QuataSchema, TableSchema, TranslationContext } diff --git a/packages/quata/src/schema/from-kysely.ts b/packages/quata/src/schema/from-kysely.ts new file mode 100644 index 0000000000..7f524ae8ee --- /dev/null +++ b/packages/quata/src/schema/from-kysely.ts @@ -0,0 +1,123 @@ +// helpers to derive quata schema from kysely database types +// this provides better type inference when defining schemas + +import type { + FieldDefinition, + FieldType, + QuataSchema, + RelationDefinition, + TableSchema, +} from "./types.js" + +// extract the table type from a kysely database +type KyselyTable = DB[K] + +// map common kysely/postgres column types to quata field types +type InferFieldType = T extends string + ? "string" + : T extends number + ? "number" + : T extends boolean + ? "boolean" + : T extends Date + ? "date" + : T extends object + ? "jsonb" + : T extends unknown[] + ? "array" + : "string" + +// extract column names from a kysely table type +type ColumnNames = T extends object ? keyof T & string : never + +// helper to create a field definition from a kysely column type +export function field<_T>( + type: FieldType, + options?: Partial> +): FieldDefinition { + return { type, ...options } +} + +// shorthand field creators +export const stringField = (opts?: Partial>) => + field("string", opts) +export const numberField = (opts?: Partial>) => + field("number", opts) +export const booleanField = (opts?: Partial>) => + field("boolean", opts) +export const dateField = (opts?: Partial>) => + field("date", opts) +export const jsonbField = (opts?: Partial>) => + field("jsonb", opts) + +// helper to create a relation definition +export function relation( + target: string, + foreignKey: string, + options?: Partial> +): RelationDefinition { + return { + target, + foreignKey, + type: options?.type ?? "many-to-one", + targetKey: options?.targetKey ?? "id", + } +} + +// helper to define a table schema with type inference from kysely +// this allows autocomplete for column names +export function defineTableFromKysely( + _db: DB, + _tableName: TableName, + config: { + table?: string + fields: Record + relations?: Record + defaultOrderColumn?: string + } +): TableSchema { + return config +} + +// type to extract available tables from a kysely database +export type KyselyTableNames = keyof DB & string + +// type-safe schema builder that validates table/column references against kysely types +export interface SchemaBuilder { + // add a table to the schema + table( + name: K, + config: { + table?: string + fields: Record + relations?: Record + defaultOrderColumn?: string + } + ): SchemaBuilder + + // build the final schema + build(): QuataSchema +} + +// create a schema builder typed against a kysely database +export function createSchemaBuilder(): SchemaBuilder { + const tables: Record = {} + + const builder: SchemaBuilder = { + table(name, config) { + tables[name] = config + return builder + }, + build() { + return { tables } + }, + } + + return builder +} + +// utility type to make defining schemas easier by inferring field types +// from kysely column types +export type FieldsFromKysely = { + [K in keyof T & string]?: FieldDefinition +} diff --git a/packages/quata/src/subset-validator.ts b/packages/quata/src/subset-validator.ts index 0e2a496e88..9b91cb8ed4 100644 --- a/packages/quata/src/subset-validator.ts +++ b/packages/quata/src/subset-validator.ts @@ -3,6 +3,7 @@ import type { BinaryNode, BlockNode, ConditionNode, + ExprNode, FunctionNode, NegationNode, ObjectConstructorNode, @@ -12,8 +13,7 @@ import type { VariableNode, } from "./jsonata.overrides.js" -import jsonata from "jsonata" - +import { parseExpression } from "./ast-cache.js" import { getFunctionMapping } from "./function-mapping.js" import { BINARY_OPERATOR_CLASSIFICATION, @@ -36,7 +36,7 @@ export interface ValidationResult { } // using any for node types since the jsonata types don't fully match runtime -type AstNode = jsonata.ExprNode | { type: string; [key: string]: unknown } +type AstNode = ExprNode | { type: string; [key: string]: unknown } // validate an entire expression export function validateExpression(expr: string): ValidationResult { @@ -45,7 +45,7 @@ export function validateExpression(expr: string): ValidationResult { let ast: AstNode try { - ast = jsonata(expr).ast() as AstNode + ast = parseExpression(expr) as AstNode } catch (e) { return { valid: false, diff --git a/packages/quata/src/translator/expression.ts b/packages/quata/src/translator/expression.ts index 5fa472bf36..e79b41dfed 100644 --- a/packages/quata/src/translator/expression.ts +++ b/packages/quata/src/translator/expression.ts @@ -212,6 +212,34 @@ function translateVariable( throw new TranslationError(`unresolved variable: $${varName}`, node, ctx) } +// check if a result references a jsonb field +function isJsonbField(result: TranslationResult, ctx: TranslationContext): boolean { + if (result.type !== "reference" || !ctx.currentTable) return false + + const tableSchema = ctx.schema.tables[ctx.currentTable] + if (!tableSchema) return false + + // find the field by column name + for (const field of Object.values(tableSchema.fields)) { + if (field.column === result.column && field.type === "jsonb") { + return true + } + } + return false +} + +// wrap a literal value for jsonb comparison (auto-stringify strings) +function wrapForJsonbComparison( + result: TranslationResult, + ctx: TranslationContext +): RawBuilder { + if (result.type === "literal" && typeof result.value === "string") { + // json stringify the string value for jsonb comparison + return sql.lit(JSON.stringify(result.value)) + } + return resultToSql(result, ctx) +} + // translate a binary expression function translateBinary( node: ExprNode & { type: "binary" }, @@ -227,11 +255,28 @@ function translateBinary( const left = translateExpression(binaryNode.lhs, ctx) const right = translateExpression(binaryNode.rhs, ctx) - const leftSql = resultToSql(left, ctx) - const rightSql = resultToSql(right, ctx) - const op = binaryNode.value + // for comparison operators, check if we're comparing against a jsonb field + // and auto-stringify string literals + const isComparison = ["=", "!=", "<", "<=", ">", ">="].includes(op) + const leftIsJsonb = isJsonbField(left, ctx) + const rightIsJsonb = isJsonbField(right, ctx) + + let leftSql: RawBuilder + let rightSql: RawBuilder + + if (isComparison && leftIsJsonb) { + leftSql = resultToSql(left, ctx) + rightSql = wrapForJsonbComparison(right, ctx) + } else if (isComparison && rightIsJsonb) { + leftSql = wrapForJsonbComparison(left, ctx) + rightSql = resultToSql(right, ctx) + } else { + leftSql = resultToSql(left, ctx) + rightSql = resultToSql(right, ctx) + } + // map jsonata operators to sql switch (op) { // comparison @@ -681,10 +726,20 @@ function substringFunc(args: TranslationResult[], ctx: TranslationContext): Tran } } -// contains function +// contains function - handles both text and jsonb fields function containsFunc(args: TranslationResult[], ctx: TranslationContext): TranslationResult { - const strSql = resultToSql(args[0], ctx) + const firstArg = args[0] + const strSql = resultToSql(firstArg, ctx) const patternSql = resultToSql(args[1], ctx) + + // if the first argument is a jsonb field, cast to text and use ILIKE for case-insensitive + if (isJsonbField(firstArg, ctx)) { + return { + type: "expression", + value: sql`${strSql}::text ILIKE '%' || ${patternSql} || '%'`, + } + } + return { type: "expression", value: sql`POSITION(${patternSql} IN ${strSql}) > 0`, diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml index 09b6b59c59..93108627f8 100644 --- a/pnpm-lock.yaml +++ b/pnpm-lock.yaml @@ -56,7 +56,7 @@ catalogs: version: 20.19.11 '@typescript/native-preview': specifier: latest - version: 7.0.0-dev.20260106.1 + version: 7.0.0-dev.20260205.1 '@vitejs/plugin-react': specifier: ^4.5.0 version: 4.7.0 @@ -178,7 +178,7 @@ importers: version: 2.8.12 '@turbo/gen': specifier: ^2.5.6 - version: 2.5.6(@swc/core@1.7.24(@swc/helpers@0.5.17))(@types/node@24.3.0)(typescript@5.9.2) + version: 2.5.6(@swc/core@1.7.24(@swc/helpers@0.5.17))(@types/node@25.2.0)(typescript@5.9.2) concurrently: specifier: ^9.2.0 version: 9.2.0 @@ -283,6 +283,9 @@ importers: '@pubpub/json-interpolate': specifier: workspace:* version: link:../packages/json-interpolate + '@pubpub/quata': + specifier: workspace:* + version: link:../packages/quata '@react-email/render': specifier: ^1.2.0 version: 1.2.0(react-dom@19.2.3(react@19.2.3))(react@19.2.3) @@ -643,7 +646,7 @@ importers: version: 9.0.8 '@typescript/native-preview': specifier: 'catalog:' - version: 7.0.0-dev.20260106.1 + version: 7.0.0-dev.20260205.1 '@vitejs/plugin-react': specifier: 'catalog:' version: 4.7.0(vite@6.3.5(@types/node@20.19.11)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1)) @@ -758,7 +761,7 @@ importers: version: 19.1.7(@types/react@19.1.10) '@typescript/native-preview': specifier: 'catalog:' - version: 7.0.0-dev.20260106.1 + version: 7.0.0-dev.20260205.1 autoprefixer: specifier: 'catalog:' version: 10.4.21(postcss@8.5.6) @@ -819,7 +822,7 @@ importers: version: 20.19.11 '@typescript/native-preview': specifier: 'catalog:' - version: 7.0.0-dev.20260106.1 + version: 7.0.0-dev.20260205.1 dotenv-cli: specifier: ^7.4.4 version: 7.4.4 @@ -1078,7 +1081,7 @@ importers: version: 9.0.8 '@typescript/native-preview': specifier: 'catalog:' - version: 7.0.0-dev.20260106.1 + version: 7.0.0-dev.20260205.1 '@uiw/react-json-view': specifier: 2.0.0-alpha.27 version: 2.0.0-alpha.27(@babel/runtime@7.28.3)(react-dom@19.2.3(react@19.2.3))(react@19.2.3) @@ -1127,7 +1130,7 @@ importers: version: 3.51.0(@types/node@20.19.11)(zod@3.25.76) '@typescript/native-preview': specifier: 'catalog:' - version: 7.0.0-dev.20260106.1 + version: 7.0.0-dev.20260205.1 tsconfig: specifier: workspace:* version: link:../../config/tsconfig @@ -1155,13 +1158,13 @@ importers: devDependencies: '@ts-rest/core': specifier: 'catalog:' - version: 3.51.0(@types/node@24.3.0)(zod@3.25.76) + version: 3.51.0(@types/node@25.2.0)(zod@3.25.76) '@types/pg': specifier: ^8.15.5 version: 8.15.5 '@typescript/native-preview': specifier: 'catalog:' - version: 7.0.0-dev.20260106.1 + version: 7.0.0-dev.20260205.1 dotenv-cli: specifier: ^7.4.4 version: 7.4.4 @@ -1197,7 +1200,7 @@ importers: version: 0.0.31(react-dom@19.2.3(react@19.2.3))(react@19.2.3) '@typescript/native-preview': specifier: 'catalog:' - 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'@types/node': 22.17.2 + '@types/node': 25.2.0 '@types/mime-types@2.1.4': {} @@ -21383,11 +21421,11 @@ snapshots: '@types/mysql@2.15.26': dependencies: - '@types/node': 22.17.2 + '@types/node': 25.2.0 '@types/mysql@2.15.27': dependencies: - '@types/node': 22.17.2 + '@types/node': 25.2.0 '@types/nlcst@2.0.3': dependencies: @@ -21401,9 +21439,9 @@ snapshots: dependencies: undici-types: 6.21.0 - '@types/node@24.3.0': + '@types/node@25.2.0': dependencies: - undici-types: 7.10.0 + undici-types: 7.16.0 '@types/nodemailer@6.4.18': dependencies: @@ -21426,7 +21464,7 @@ snapshots: '@types/pg@8.15.4': dependencies: - '@types/node': 22.17.2 + '@types/node': 25.2.0 pg-protocol: 1.10.3 pg-types: 2.2.0 @@ -21438,7 +21476,7 @@ snapshots: '@types/pg@8.6.1': dependencies: - '@types/node': 22.17.2 + '@types/node': 25.2.0 pg-protocol: 1.10.3 pg-types: 2.2.0 @@ -21462,11 +21500,11 @@ snapshots: '@types/readdir-glob@1.1.5': dependencies: - '@types/node': 22.17.2 + '@types/node': 25.2.0 '@types/resolve@1.17.1': dependencies: - 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magic-string: 0.30.17 + magic-string: 0.30.21 optionalDependencies: msw: 2.10.5(@types/node@20.19.11)(typescript@5.9.2) vite: 6.3.5(@types/node@20.19.11)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) @@ -21881,14 +21919,14 @@ snapshots: msw: 2.10.5(@types/node@20.19.11)(typescript@5.9.2) vite: 6.3.5(@types/node@20.19.11)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) - '@vitest/mocker@3.2.4(msw@2.10.5(@types/node@24.3.0)(typescript@5.9.2))(vite@6.3.5(@types/node@24.3.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1))': + '@vitest/mocker@3.2.4(msw@2.10.5(@types/node@25.2.0)(typescript@5.9.2))(vite@6.3.5(@types/node@25.2.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1))': dependencies: '@vitest/spy': 3.2.4 estree-walker: 3.0.3 magic-string: 0.30.17 optionalDependencies: - msw: 2.10.5(@types/node@24.3.0)(typescript@5.9.2) - vite: 6.3.5(@types/node@24.3.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) + msw: 2.10.5(@types/node@25.2.0)(typescript@5.9.2) + vite: 6.3.5(@types/node@25.2.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) '@vitest/pretty-format@3.0.5': dependencies: @@ -23523,7 +23561,7 @@ snapshots: engine.io@6.6.4: dependencies: '@types/cors': 2.8.19 - '@types/node': 22.17.2 + '@types/node': 25.2.0 accepts: 1.3.8 base64id: 2.0.0 cookie: 0.7.2 @@ -24747,9 +24785,9 @@ snapshots: strip-ansi: 6.0.1 through: 2.3.8 - inquirer@8.2.7(@types/node@24.3.0): + inquirer@8.2.7(@types/node@25.2.0): dependencies: - '@inquirer/external-editor': 1.0.1(@types/node@24.3.0) + '@inquirer/external-editor': 1.0.1(@types/node@25.2.0) ansi-escapes: 4.3.2 chalk: 4.1.2 cli-cursor: 3.1.0 @@ -25054,13 +25092,13 @@ snapshots: jest-worker@26.6.2: dependencies: - '@types/node': 22.17.2 + '@types/node': 25.2.0 merge-stream: 2.0.0 supports-color: 7.2.0 jest-worker@27.5.1: dependencies: - '@types/node': 22.17.2 + '@types/node': 25.2.0 merge-stream: 2.0.0 supports-color: 8.1.1 @@ -26263,12 +26301,12 @@ snapshots: transitivePeerDependencies: - '@types/node' - msw@2.10.5(@types/node@24.3.0)(typescript@5.9.2): + msw@2.10.5(@types/node@25.2.0)(typescript@5.9.2): dependencies: '@bundled-es-modules/cookie': 2.0.1 '@bundled-es-modules/statuses': 1.0.1 '@bundled-es-modules/tough-cookie': 0.1.6 - '@inquirer/confirm': 5.1.15(@types/node@24.3.0) + '@inquirer/confirm': 5.1.15(@types/node@25.2.0) '@mswjs/interceptors': 0.39.6 '@open-draft/deferred-promise': 2.2.0 '@open-draft/until': 2.1.0 @@ -27253,7 +27291,7 @@ snapshots: '@protobufjs/path': 1.1.2 '@protobufjs/pool': 1.1.0 '@protobufjs/utf8': 1.1.0 - '@types/node': 22.17.2 + '@types/node': 25.2.0 long: 5.3.2 proxy-agent@6.5.0: @@ -28871,14 +28909,14 @@ snapshots: optionalDependencies: '@swc/core': 1.7.24(@swc/helpers@0.5.17) - ts-node@10.9.2(@swc/core@1.7.24(@swc/helpers@0.5.17))(@types/node@24.3.0)(typescript@5.9.2): + ts-node@10.9.2(@swc/core@1.7.24(@swc/helpers@0.5.17))(@types/node@25.2.0)(typescript@5.9.2): dependencies: '@cspotcode/source-map-support': 0.8.1 '@tsconfig/node10': 1.0.11 '@tsconfig/node12': 1.0.11 '@tsconfig/node14': 1.0.3 '@tsconfig/node16': 1.0.4 - '@types/node': 24.3.0 + '@types/node': 25.2.0 acorn: 8.15.0 acorn-walk: 8.3.4 arg: 4.1.3 @@ -29054,7 +29092,7 @@ snapshots: undici-types@6.21.0: {} - undici-types@7.10.0: {} + undici-types@7.16.0: {} unicode-canonical-property-names-ecmascript@2.0.1: {} @@ -29325,13 +29363,13 @@ snapshots: - tsx - yaml - vite-node@3.2.4(@types/node@24.3.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1): + vite-node@3.2.4(@types/node@25.2.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1): dependencies: cac: 6.7.14 debug: 4.4.1 es-module-lexer: 1.7.0 pathe: 2.0.3 - vite: 6.3.5(@types/node@24.3.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) + vite: 6.3.5(@types/node@25.2.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) transitivePeerDependencies: - '@types/node' - jiti @@ -29350,7 +29388,7 @@ snapshots: dependencies: '@next/env': 15.5.0 image-size: 2.0.2 - magic-string: 0.30.17 + magic-string: 0.30.21 module-alias: 2.2.3 next: 15.5.9(@babel/core@7.28.3)(@opentelemetry/api@1.9.0)(@playwright/test@1.53.0)(react-dom@19.2.3(react@19.2.3))(react@19.2.3) storybook: 9.1.2(@testing-library/dom@10.4.1)(msw@2.10.5(@types/node@20.19.11)(typescript@5.9.2))(prettier@3.6.2)(vite@6.3.5(@types/node@20.19.11)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1)) @@ -29406,7 +29444,7 @@ snapshots: tsx: 4.20.5 yaml: 2.8.1 - vite@6.3.5(@types/node@24.3.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1): + vite@6.3.5(@types/node@25.2.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1): dependencies: esbuild: 0.25.9 fdir: 6.5.0(picomatch@4.0.3) @@ -29415,7 +29453,7 @@ snapshots: rollup: 4.46.4 tinyglobby: 0.2.14 optionalDependencies: - '@types/node': 24.3.0 + '@types/node': 25.2.0 fsevents: 2.3.3 jiti: 2.6.1 lightningcss: 1.30.2 @@ -29471,11 +29509,11 @@ snapshots: - tsx - yaml - vitest@3.2.4(@types/debug@4.1.12)(@types/node@24.3.0)(jiti@2.6.1)(jsdom@25.0.1)(lightningcss@1.30.2)(msw@2.10.5(@types/node@24.3.0)(typescript@5.9.2))(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1): + vitest@3.2.4(@types/debug@4.1.12)(@types/node@25.2.0)(jiti@2.6.1)(jsdom@25.0.1)(lightningcss@1.30.2)(msw@2.10.5(@types/node@25.2.0)(typescript@5.9.2))(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1): dependencies: '@types/chai': 5.2.2 '@vitest/expect': 3.2.4 - '@vitest/mocker': 3.2.4(msw@2.10.5(@types/node@24.3.0)(typescript@5.9.2))(vite@6.3.5(@types/node@24.3.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1)) + '@vitest/mocker': 3.2.4(msw@2.10.5(@types/node@25.2.0)(typescript@5.9.2))(vite@6.3.5(@types/node@25.2.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1)) '@vitest/pretty-format': 3.2.4 '@vitest/runner': 3.2.4 '@vitest/snapshot': 3.2.4 @@ -29493,12 +29531,12 @@ snapshots: tinyglobby: 0.2.14 tinypool: 1.1.1 tinyrainbow: 2.0.0 - vite: 6.3.5(@types/node@24.3.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) - vite-node: 3.2.4(@types/node@24.3.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) + vite: 6.3.5(@types/node@25.2.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) + vite-node: 3.2.4(@types/node@25.2.0)(jiti@2.6.1)(lightningcss@1.30.2)(terser@5.43.1)(tsx@4.20.5)(yaml@2.8.1) why-is-node-running: 2.3.0 optionalDependencies: '@types/debug': 4.1.12 - '@types/node': 24.3.0 + '@types/node': 25.2.0 jsdom: 25.0.1 transitivePeerDependencies: - jiti From 87b1f0821445da0f9cf5b152fabce0a8a45e5fbe Mon Sep 17 00:00:00 2001 From: "Thomas F. K. Jorna" Date: Mon, 9 Feb 2026 18:25:20 +0100 Subject: [PATCH 7/7] feat: expand --- .../server/jsonata-query/jsonquery.db.test.ts | 307 +++++++++++++++--- core/lib/server/jsonata-query/pubpub-quata.ts | 296 +++++++++++++++-- 2 files changed, 526 insertions(+), 77 deletions(-) diff --git a/core/lib/server/jsonata-query/jsonquery.db.test.ts b/core/lib/server/jsonata-query/jsonquery.db.test.ts index f3d07c9670..e441da37cc 100644 --- a/core/lib/server/jsonata-query/jsonquery.db.test.ts +++ b/core/lib/server/jsonata-query/jsonquery.db.test.ts @@ -5,6 +5,7 @@ import { CoreSchemaType, MemberRole } from "db/public" import { mockServerCode } from "~/lib/__tests__/utils" import { createSeed } from "~/prisma/seed/createSeed" + import { compilePubFilter } from "./pubpub-quata" const { createForEachMockedTransaction } = await mockServerCode() @@ -68,6 +69,7 @@ const seed = createSeed({ pubType: "Basic Pub", values: { Title: "A pub related to another Pub", + Description: "Related pub description", }, }, }, @@ -86,66 +88,127 @@ const seed = createSeed({ type TestCase = [string, string, (results: any[]) => void] +// helper to run a filter test against pubs +async function runFilterTest( + expression: string, + communitySlug: string, + trx: any, + communityId: string +) { + const filter = compilePubFilter(expression, { communitySlug }) + return trx + .selectFrom("pubs") + .selectAll() + .where((eb: any) => filter.apply(eb, "pubs")) + .where("pubs.communityId", "=", communityId) + .execute() +} + describe("pubpub quata filter", () => { it.for([ + // 1. direct field filter [ - "filter by direct title field", + "direct field: title", "$$pubs[title = 'Some title']", (results) => { expect(results).toHaveLength(1) expect(results[0].title).toBe("Some title") }, ], + // 2. value access with dot notation [ - "filter by pubType.name relation", - "$$pubs[pubType.name = 'Basic Pub']", + "value access: values.Title", + "$$pubs[values.Title = 'Some title']", (results) => { - // 3 basic pubs (2 top-level + 1 related) - expect(results.length).toBeGreaterThanOrEqual(2) - for (const r of results) { - expect(r.pubTypeId).toBeDefined() - } + expect(results).toHaveLength(1) + expect(results[0].title).toBe("Some title") }, ], + // 3. value access with bracket notation (dashes in slug) [ - "filter by stage.name relation", - "$$pubs[stage.name = 'Stage 1']", + "value access: values['some-relation'] (bracket notation)", + "$$pubs[values['some-relation'] = 'test relation value']", (results) => { - expect(results).toHaveLength(2) + expect(results).toHaveLength(1) + expect(results[0].title).toBe("Another title") }, ], + // 4. schema relation: pubType.name [ - "filter by values.Title (shorthand expansion)", - "$$pubs[values.Title = 'Some title']", + "schema relation: pubType.name", + "$$pubs[pubType.name = 'Minimal Pub']", (results) => { expect(results).toHaveLength(1) - expect(results[0].title).toBe("Some title") + expect(results[0].title).toBe("Minimal pub") + }, + ], + // 5. schema relation: stage.name + [ + "schema relation: stage.name", + "$$pubs[stage.name = 'Stage 1']", + (results) => { + expect(results).toHaveLength(2) }, ], + // 6. $contains function on values [ "$contains on values.Description", - "$$pubs[$exists(values.description)]", + "$$pubs[$contains(values.Description, 'Some')]", (results) => { expect(results).toHaveLength(1) expect(results[0].title).toBe("Another title") }, ], + // 7. combined boolean filter [ - "combined filter: values and direct field", + "combined: values AND direct field", "$$pubs[values.Title = 'Some title' and title = 'Some title']", (results) => { expect(results).toHaveLength(1) - expect(results[0].title).toBe("Some title") }, ], + ] satisfies TestCase[])("%s", async ([_title, expression, expected]) => { + const { seedCommunity } = await import("~/prisma/seed/seedCommunity") + const trx = getTrx() + const community = await seedCommunity(seed, undefined, trx) + + const results = await runFilterTest( + expression, + community.community.slug, + trx, + community.community.id + ) + expected(results) + }) +}) + +describe("outgoing relation filters (out)", () => { + it.for([ + // out['slug'].directField [ - "filter with projection expression ignores projection", - '$$pubs[values.Title = "Some title" and title = "Some title"].{ "title": $.title }', + "out relation, direct field: out['some-relation'].title", + "$$pubs[out['some-relation'].title = 'A pub related to another Pub']", (results) => { - // compilePubFilter only applies the filter part - // projection is handled in-memory by post-fetch-projection expect(results).toHaveLength(1) - expect(results[0].title).toBe("Some title") + expect(results[0].title).toBe("Another title") + }, + ], + // out['slug'].values.fieldSlug + [ + "out relation, value access: out['some-relation'].values.Title", + "$$pubs[out['some-relation'].values.Title = 'A pub related to another Pub']", + (results) => { + expect(results).toHaveLength(1) + expect(results[0].title).toBe("Another title") + }, + ], + // out['slug'].values.fieldSlug with description + [ + "out relation, value access: out['some-relation'].values.Description", + "$$pubs[out['some-relation'].values.Description = 'Related pub description']", + (results) => { + expect(results).toHaveLength(1) + expect(results[0].title).toBe("Another title") }, ], ] satisfies TestCase[])("%s", async ([_title, expression, expected]) => { @@ -153,45 +216,207 @@ describe("pubpub quata filter", () => { const trx = getTrx() const community = await seedCommunity(seed, undefined, trx) - const filter = compilePubFilter(expression, { - communitySlug: community.community.slug, - }) + const results = await runFilterTest( + expression, + community.community.slug, + trx, + community.community.id + ) + expected(results) + }) +}) - // apply the filter directly to a pubs query - const results = await trx - .selectFrom("pubs") - .selectAll() - .where((eb) => filter.apply(eb, "pubs")) - .where("pubs.communityId", "=", community.community.id) - .execute() +describe("incoming relation filters (in)", () => { + it.for([ + // in['slug'].directField + // pub 3 ("A pub related to another Pub") has an incoming relation from pub 2 ("Another title") + [ + "in relation, direct field: in['some-relation'].title", + "$$pubs[in['some-relation'].title = 'Another title']", + (results) => { + expect(results).toHaveLength(1) + expect(results[0].title).toBe("A pub related to another Pub") + }, + ], + // in['slug'].values.fieldSlug + [ + "in relation, value access: in['some-relation'].values.Title", + "$$pubs[in['some-relation'].values.Title = 'Another title']", + (results) => { + expect(results).toHaveLength(1) + expect(results[0].title).toBe("A pub related to another Pub") + }, + ], + // in['slug'].values.fieldSlug with description + [ + "in relation, value access: in['some-relation'].values.Description", + "$$pubs[in['some-relation'].values.Description = 'Some description']", + (results) => { + expect(results).toHaveLength(1) + expect(results[0].title).toBe("A pub related to another Pub") + }, + ], + ] satisfies TestCase[])("%s", async ([_title, expression, expected]) => { + const { seedCommunity } = await import("~/prisma/seed/seedCommunity") + const trx = getTrx() + const community = await seedCommunity(seed, undefined, trx) + const results = await runFilterTest( + expression, + community.community.slug, + trx, + community.community.id + ) expected(results) }) }) -describe.only("on pubs", () => { - it("can filter by quata expression", async () => { +describe("getPubsWithRelatedValues integration", () => { + it("filters with quataExpression option", async () => { const { seedCommunity } = await import("~/prisma/seed/seedCommunity") const trx = getTrx() const community = await seedCommunity(seed, undefined, trx) const { getPubsWithRelatedValues } = await import("../pub") const results = await getPubsWithRelatedValues( + { communityId: community.community.id }, { - communityId: community.community.id, - }, + quataExpression: { + expression: "$$pubs[values.Title = 'Some title']", + communitySlug: community.community.slug, + }, + trx, + } + ) + + expect(Array.isArray(results) ? results : [results]).toHaveLength(1) + }) + + it("filters by outgoing relation through getPubsWithRelatedValues", async () => { + const { seedCommunity } = await import("~/prisma/seed/seedCommunity") + const trx = getTrx() + const community = await seedCommunity(seed, undefined, trx) + const { getPubsWithRelatedValues } = await import("../pub") + + const results = await getPubsWithRelatedValues( + { communityId: community.community.id }, { quataExpression: { - expression: `$$pubs[values['some-relation'].relatedPub.title = 'A pub related to another Pub']`, + expression: + "$$pubs[out['some-relation'].title = 'A pub related to another Pub']", communitySlug: community.community.slug, }, + trx, } ) - console.log(results.map((r) => r.values)) - expect(results).toHaveLength(1) - expect(results[0].values.find((v) => v.fieldSlug.includes("some-relation"))?.value).toBe( - "test relation value" + const arr = Array.isArray(results) ? results : [results] + expect(arr).toHaveLength(1) + expect(arr[0].title).toBe("Another title") + }) + + it("filters by incoming relation through getPubsWithRelatedValues", async () => { + const { seedCommunity } = await import("~/prisma/seed/seedCommunity") + const trx = getTrx() + const community = await seedCommunity(seed, undefined, trx) + const { getPubsWithRelatedValues } = await import("../pub") + + const results = await getPubsWithRelatedValues( + { communityId: community.community.id }, + { + quataExpression: { + expression: "$$pubs[in['some-relation'].title = 'Another title']", + communitySlug: community.community.slug, + }, + trx, + } ) + + const arr = Array.isArray(results) ? results : [results] + expect(arr).toHaveLength(1) + expect(arr[0].title).toBe("A pub related to another Pub") + }) +}) + +describe("post-fetch projection", () => { + it("projects values and direct fields from fetched pubs", async () => { + const { seedCommunity } = await import("~/prisma/seed/seedCommunity") + const trx = getTrx() + const community = await seedCommunity(seed, undefined, trx) + const { getPubsWithRelatedValues } = await import("../pub") + const { applyProjection } = await import("./post-fetch-projection") + const { splitExpression } = await import("./expression-splitter") + + // in the filter portion, expandShorthands lowercases slugs automatically + // in the projection portion (in-memory jsonata), slugs must match the db (lowercase) + const fullExpression = + '$$pubs[values.Title = "Another title"].{ "title": title, "desc": values.description }' + const split = splitExpression(fullExpression) + + expect(split.hasProjection).toBe(true) + expect(split.projectionExpression).toBeTruthy() + + // phase 1: filter via sql + const pubs = await getPubsWithRelatedValues( + { communityId: community.community.id }, + { + quataExpression: { + expression: split.queryExpression, + communitySlug: community.community.slug, + }, + trx, + } + ) + + const arr = Array.isArray(pubs) ? pubs : [pubs] + expect(arr).toHaveLength(1) + + // phase 2: project in-memory via pub proxy + const projected = await applyProjection( + arr, + split.projectionExpression!, + community.community.slug + ) + + expect(projected).toHaveLength(1) + expect((projected[0] as any).title).toBe("Another title") + expect((projected[0] as any).desc).toBe("Some description") + }) + + it("projects outgoing relation data from fetched pubs", async () => { + const { seedCommunity } = await import("~/prisma/seed/seedCommunity") + const trx = getTrx() + const community = await seedCommunity(seed, undefined, trx) + const { getPubsWithRelatedValues } = await import("../pub") + const { applyProjection } = await import("./post-fetch-projection") + + // fetch the pub that has the outgoing relation + const pubs = await getPubsWithRelatedValues( + { communityId: community.community.id }, + { + quataExpression: { + expression: "$$pubs[values.Title = 'Another title']", + communitySlug: community.community.slug, + }, + trx, + } + ) + + const arr = Array.isArray(pubs) ? pubs : [pubs] + expect(arr).toHaveLength(1) + + // project: extract title and the related pub's title via out + // note: field slugs are lowercase in the database (slugified), + // so projection expressions must use lowercase slugs + const projected = await applyProjection( + arr, + '{ "myTitle": title, "relatedTitle": out.`some-relation`.values.title }', + community.community.slug + ) + + expect(projected).toHaveLength(1) + const result = projected[0] as any + expect(result.myTitle).toBe("Another title") + expect(result.relatedTitle).toBe("A pub related to another Pub") }) }) diff --git a/core/lib/server/jsonata-query/pubpub-quata.ts b/core/lib/server/jsonata-query/pubpub-quata.ts index f99a9140be..a21b11cd30 100644 --- a/core/lib/server/jsonata-query/pubpub-quata.ts +++ b/core/lib/server/jsonata-query/pubpub-quata.ts @@ -71,6 +71,8 @@ export function compilePubFilter( // expand user-facing shorthands to valid jsonata // values.fieldSlug -> values[field.slug = 'communitySlug:fieldSlug'].value // values['field-slug'] -> values[field.slug = 'communitySlug:field-slug'].value +// out['slug'] -> out['communitySlug:slug'] +// in['slug'] -> in['communitySlug:slug'] // this keeps the expression valid jsonata for frontend preview function expandShorthands(expression: string, communitySlug: string): string { // dot notation: values.fieldSlug (not followed by . or [ or () @@ -89,6 +91,25 @@ function expandShorthands(expression: string, communitySlug: string): string { `values[field.slug = '${communitySlug}:${fieldSlug.toLowerCase()}'].value` ) + // out['slug'] -> out['communitySlug:slug'] (prefix community slug for relation fields) + // only prefix if the slug doesn't already contain a colon + result = result.replace( + /out\[['"]([^'"]+)['"]\]/g, + (_match, slug) => { + const prefixed = slug.includes(":") ? slug : `${communitySlug}:${slug.toLowerCase()}` + return `out['${prefixed}']` + } + ) + + // in['slug'] -> in['communitySlug:slug'] + result = result.replace( + /in\[['"]([^'"]+)['"]\]/g, + (_match, slug) => { + const prefixed = slug.includes(":") ? slug : `${communitySlug}:${slug.toLowerCase()}` + return `in['${prefixed}']` + } + ) + return result } @@ -300,17 +321,14 @@ function translateComparison( return eb.val(true) as any } - // value access pattern: values[field.slug = '...'].value if (leftPath.type === "value_access") { return buildValueExistsSubquery(eb, leftPath.fieldSlug, op, rightValue, pubRef) } - // relation path: pubType.name, stage.name, etc. if (leftPath.type === "relation") { return buildRelationCondition(eb, leftPath.relation, leftPath.field, op, rightValue, pubRef) } - // direct field on pubs table if (leftPath.type === "direct") { const sqlOp = mapOperator(op) const ref = sql.ref(`${pubRef}.${leftPath.field}`) @@ -322,6 +340,34 @@ function translateComparison( return eb(ref as any, sqlOp as any, rightValue) as any } + // outgoing relation with direct field: out['slug'].title + if (leftPath.type === "out_direct") { + return buildOutRelationDirectCondition( + eb, leftPath.relationSlug, leftPath.field, op, rightValue, pubRef + ) + } + + // outgoing relation with value access: out['slug'].values.fieldSlug + if (leftPath.type === "out_value") { + return buildOutRelationValueCondition( + eb, leftPath.relationSlug, leftPath.valueFieldSlug, op, rightValue, pubRef + ) + } + + // incoming relation with direct field: in['slug'].title + if (leftPath.type === "in_direct") { + return buildInRelationDirectCondition( + eb, leftPath.relationSlug, leftPath.field, op, rightValue, pubRef + ) + } + + // incoming relation with value access: in['slug'].values.fieldSlug + if (leftPath.type === "in_value") { + return buildInRelationValueCondition( + eb, leftPath.relationSlug, leftPath.valueFieldSlug, op, rightValue, pubRef + ) + } + return eb.val(true) as any } @@ -329,11 +375,49 @@ type ResolvedPath = | { type: "direct"; field: string } | { type: "value_access"; fieldSlug: string } | { type: "relation"; relation: string; field: string } + | { type: "out_direct"; relationSlug: string; field: string } + | { type: "out_value"; relationSlug: string; valueFieldSlug: string } + | { type: "in_direct"; relationSlug: string; field: string } + | { type: "in_value"; relationSlug: string; valueFieldSlug: string } + +// extract a bare string from a filter predicate (for bracket notation: name['string']) +function extractStringFilter(predicates: Array>): string | null { + for (const pred of predicates) { + if (pred.type === "filter" && pred.expr?.type === "string") { + return pred.expr.value as string + } + } + return null +} + +// resolve remaining path steps after an out/in prefix to determine the nested access type +function resolveNestedAccess(steps: Array>): { + type: "direct" + field: string +} | { + type: "value_access" + fieldSlug: string +} | null { + if (steps.length === 0) return null + + // single step: direct field (e.g., .title) + if (steps.length === 1 && steps[0]?.type === "name") { + return { type: "direct", field: steps[0].value as string } + } + + // values[field.slug = '...'].value pattern (expanded from values.fieldSlug) + if (steps[0]?.value === "values" && (steps[0]?.stages || steps[0]?.predicate)) { + const filterSource = steps[0].stages ?? steps[0].predicate + const fieldSlug = extractFieldSlugFromPredicate(filterSource) + if (fieldSlug) { + return { type: "value_access", fieldSlug } + } + } + + return null +} -// resolve a path expression to understand what it references function resolvePath(node: Record): ResolvedPath | null { - console.dir(node, { depth: null }) - // simple name node: title, createdAt, etc. if (node.type === "name") { const name = node.value as string if (DIRECT_PUB_FIELDS.has(name)) { @@ -342,48 +426,65 @@ function resolvePath(node: Record): ResolvedPath | null { return null } - // path expression: pubType.name, values[...].value, stage.name - if (node.type === "path") { - const steps = node.steps as Array> - if (steps.length === 0) return null + if (node.type !== "path") return null - const firstName = steps[0]?.value as string | undefined - if (!firstName) return null + const steps = node.steps as Array> + if (steps.length === 0) return null - // detect values[field.slug = '...'].value pattern - // this is what expandShorthands produces from values.fieldSlug - // jsonata stores filters as "stages" on name nodes inside paths - if (firstName === "values" && (steps[0]?.stages || steps[0]?.predicate)) { - const filterSource = steps[0].stages ?? steps[0].predicate - const fieldSlug = extractFieldSlugFromPredicate(filterSource) - if (fieldSlug) { - return { type: "value_access", fieldSlug } + const firstName = steps[0]?.value as string | undefined + if (!firstName) return null + + // out['slug'].field or out['slug'].values.fieldSlug + if (firstName === "out" && (steps[0]?.stages || steps[0]?.predicate)) { + const filterSource = steps[0].stages ?? steps[0].predicate + const relationSlug = extractStringFilter(filterSource) + if (relationSlug) { + const nested = resolveNestedAccess(steps.slice(1)) + if (nested?.type === "direct") { + return { type: "out_direct", relationSlug, field: nested.field } + } + if (nested?.type === "value_access") { + return { type: "out_value", relationSlug, valueFieldSlug: nested.fieldSlug } } } + } - // detect relation paths like pubType.name, stage.name - if (steps.length === 2 && steps[1]?.type === "name") { - const relationName = firstName - const fieldName = steps[1].value as string - - if (DIRECT_PUB_FIELDS.has(relationName)) { - // something like id.something - not a relation - return null + // in['slug'].field or in['slug'].values.fieldSlug + if (firstName === "in" && (steps[0]?.stages || steps[0]?.predicate)) { + const filterSource = steps[0].stages ?? steps[0].predicate + const relationSlug = extractStringFilter(filterSource) + if (relationSlug) { + const nested = resolveNestedAccess(steps.slice(1)) + if (nested?.type === "direct") { + return { type: "in_direct", relationSlug, field: nested.field } + } + if (nested?.type === "value_access") { + return { type: "in_value", relationSlug, valueFieldSlug: nested.fieldSlug } } + } + } - return { type: "relation", relation: relationName, field: fieldName } + // values[field.slug = '...'].value pattern + if (firstName === "values" && (steps[0]?.stages || steps[0]?.predicate)) { + const filterSource = steps[0].stages ?? steps[0].predicate + const fieldSlug = extractFieldSlugFromPredicate(filterSource) + if (fieldSlug) { + return { type: "value_access", fieldSlug } } + } - // single step path that's a direct field - if (steps.length === 1 && DIRECT_PUB_FIELDS.has(firstName)) { - return { type: "direct", field: firstName } + // relation paths: pubType.name, stage.name + if (steps.length === 2 && steps[1]?.type === "name") { + const relationName = firstName + const fieldName = steps[1].value as string + if (!DIRECT_PUB_FIELDS.has(relationName)) { + return { type: "relation", relation: relationName, field: fieldName } } } - // variable reference like $.field (in projection context) - if (node.type === "variable" && node.value === "") { - // $ by itself, check for stages - return null + // single step direct field + if (steps.length === 1 && DIRECT_PUB_FIELDS.has(firstName)) { + return { type: "direct", field: firstName } } return null @@ -506,6 +607,129 @@ function buildRelationCondition( return eb.val(true) as any } +// outgoing relation, direct field on the related pub +// out['some-relation'].title = 'X' +// -> EXISTS (select 1 from pub_values join pub_fields join pubs +// where pub_values.pubId = pubs.id and field slug matches +// and related pub's field matches) +function buildOutRelationDirectCondition( + eb: ExpressionBuilder, + relationSlug: string, + field: string, + op: string, + value: unknown, + pubRef: string +): ExpressionWrapper { + const sqlOp = mapOperator(op) + const subquery = (eb as any) + .selectFrom("pub_values as pv_rel") + .innerJoin("pub_fields as pf_rel", "pf_rel.id", "pv_rel.fieldId") + .innerJoin("pubs as related", "related.id", "pv_rel.relatedPubId") + .select(sql.lit(1).as("exists_check")) + .where("pv_rel.pubId", "=", sql.ref(`${pubRef}.id`)) + .where("pf_rel.slug", "=", relationSlug) + .where(`related.${field}`, sqlOp, value) + return eb.exists(subquery) as ExpressionWrapper +} + +// outgoing relation, value access on the related pub +// out['some-relation'].values.Title = 'X' +// -> EXISTS (select 1 from pub_values join pub_fields +// where pub_values.pubId = pubs.id and field slug matches +// and EXISTS (select 1 from pub_values join pub_fields +// where pubId = relatedPubId and nested field slug matches and value matches)) +function buildOutRelationValueCondition( + eb: ExpressionBuilder, + relationSlug: string, + valueFieldSlug: string, + op: string, + value: unknown, + pubRef: string +): ExpressionWrapper { + const sqlOp = mapOperator(op) + const sqlValue = typeof value === "string" ? JSON.stringify(value) : value + + const innerSubquery = sql`EXISTS ( + SELECT 1 FROM pub_values AS pv_val + INNER JOIN pub_fields AS pf_val ON pf_val.id = pv_val."fieldId" + WHERE pv_val."pubId" = pv_rel."relatedPubId" + AND pf_val.slug = ${valueFieldSlug} + AND pv_val.value ${sql.raw(sqlOp)} ${sqlValue} + )` + + const subquery = (eb as any) + .selectFrom("pub_values as pv_rel") + .innerJoin("pub_fields as pf_rel", "pf_rel.id", "pv_rel.fieldId") + .select(sql.lit(1).as("exists_check")) + .where("pv_rel.pubId", "=", sql.ref(`${pubRef}.id`)) + .where("pf_rel.slug", "=", relationSlug) + .where(sql.raw(`pv_rel."relatedPubId" IS NOT NULL`)) + .where(innerSubquery) + + return eb.exists(subquery) as ExpressionWrapper +} + +// incoming relation, direct field on the source pub +// in['some-relation'].title = 'X' +// -> EXISTS (select 1 from pub_values join pub_fields join pubs +// where pub_values.relatedPubId = pubs.id and field slug matches +// and source pub's field matches) +function buildInRelationDirectCondition( + eb: ExpressionBuilder, + relationSlug: string, + field: string, + op: string, + value: unknown, + pubRef: string +): ExpressionWrapper { + const sqlOp = mapOperator(op) + const subquery = (eb as any) + .selectFrom("pub_values as pv_rel") + .innerJoin("pub_fields as pf_rel", "pf_rel.id", "pv_rel.fieldId") + .innerJoin("pubs as source", "source.id", "pv_rel.pubId") + .select(sql.lit(1).as("exists_check")) + .where("pv_rel.relatedPubId", "=", sql.ref(`${pubRef}.id`)) + .where("pf_rel.slug", "=", relationSlug) + .where(`source.${field}`, sqlOp, value) + return eb.exists(subquery) as ExpressionWrapper +} + +// incoming relation, value access on the source pub +// in['some-relation'].values.Title = 'X' +// -> EXISTS (select 1 from pub_values join pub_fields +// where pub_values.relatedPubId = pubs.id and field slug matches +// and EXISTS (select 1 from pub_values join pub_fields +// where pubId = source pubId and nested field slug matches)) +function buildInRelationValueCondition( + eb: ExpressionBuilder, + relationSlug: string, + valueFieldSlug: string, + op: string, + value: unknown, + pubRef: string +): ExpressionWrapper { + const sqlOp = mapOperator(op) + const sqlValue = typeof value === "string" ? JSON.stringify(value) : value + + const innerSubquery = sql`EXISTS ( + SELECT 1 FROM pub_values AS pv_val + INNER JOIN pub_fields AS pf_val ON pf_val.id = pv_val."fieldId" + WHERE pv_val."pubId" = pv_rel."pubId" + AND pf_val.slug = ${valueFieldSlug} + AND pv_val.value ${sql.raw(sqlOp)} ${sqlValue} + )` + + const subquery = (eb as any) + .selectFrom("pub_values as pv_rel") + .innerJoin("pub_fields as pf_rel", "pf_rel.id", "pv_rel.fieldId") + .select(sql.lit(1).as("exists_check")) + .where("pv_rel.relatedPubId", "=", sql.ref(`${pubRef}.id`)) + .where("pf_rel.slug", "=", relationSlug) + .where(innerSubquery) + + return eb.exists(subquery) as ExpressionWrapper +} + function translateFunctionFilter( eb: ExpressionBuilder, node: Record,