feat: implement :perftrace and :help commands #632
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Pull request overview
This PR implements the :perftrace command to redirect performance statistics output to a file, stderr, or stdout, working in conjunction with the -p flag from PR #631.
Changes:
- Added stat writer infrastructure with GetStat/SetStat methods following the established pattern for output/error writers
- Implemented PERFTRACE command supporting file paths, "stdout", and "stderr" with variable substitution
- Added comprehensive test coverage for the command functionality
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| pkg/sqlcmd/sqlcmd.go | Added stat field and GetStat()/SetStat() methods for managing performance statistics output writer |
| pkg/sqlcmd/commands.go | Registered PERFTRACE command and implemented perftraceCommand() function with file/stdout/stderr support |
| pkg/sqlcmd/commands_test.go | Added TestPerftraceCommand() with comprehensive test scenarios and added PERFTRACE parsing tests |
| README.md | Documented the :perftrace command with usage example |
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This was referenced Jan 25, 2026
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dlevy-msft-sql
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:perftrace redirects timing/statistics output to a file, stderr, or stdout. :help displays the list of available sqlcmd commands with usage. Both commands validate arguments and return appropriate errors.
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Summary
Adds the
:perftracecommand to redirect performance statistics output to a file, stderr, or stdout. This works in conjunction with the-pflag (PR #631) to control where timing statistics are written.Syntax
Changes
statwriter field andGetStat/SetStatmethodsPERFTRACEcommand with file/stdout/stderr supportTesting
golangci-lint runpasses (pre-existing warnings only)Related
-pflag for print statistics