diff --git a/.gitignore b/.gitignore
index b9f264b..bf66c42 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,5 @@ duckdb_unittest_tempdir/
 testext
 test/python/__pycache__/
 .Rhistory
+_codeql_build_dir/
+_codeql_detected_source_root
diff --git a/chsql/src/chsql_extension.cpp b/chsql/src/chsql_extension.cpp
index cd9bb2e..8a7d486 100644
--- a/chsql/src/chsql_extension.cpp
+++ b/chsql/src/chsql_extension.cpp
@@ -100,6 +100,8 @@ namespace duckdb
       {DEFAULT_SCHEMA, "toYYYYMMDD", {"date_expression", nullptr}, {{nullptr, nullptr}}, R"(DATE_FORMAT(date_expression, '%Y%m%d'))"},
       {DEFAULT_SCHEMA, "toYYYYMMDDhhmmss", {"date_expression", nullptr}, {{nullptr, nullptr}}, R"(DATE_FORMAT(date_expression, '%Y%m%d%H%M%S'))"},
       {DEFAULT_SCHEMA, "formatDateTime", {"time", "format", "timezone", nullptr}, {{nullptr, nullptr}}, R"(CASE  WHEN timezone IS NULL THEN strftime(time, format) ELSE strftime(time AT TIME ZONE timezone, format) END)"},
+      {DEFAULT_SCHEMA, "toUnixTimestamp", {"date_expression", nullptr}, {{nullptr, nullptr}}, R"(CAST(EXTRACT(EPOCH FROM date_expression) AS BIGINT))"},
+      {DEFAULT_SCHEMA, "fromUnixTimestamp", {"unix_timestamp", nullptr}, {{nullptr, nullptr}}, R"(CAST(to_timestamp(unix_timestamp) AS TIMESTAMP))"},
       // String Functions
       {DEFAULT_SCHEMA, "empty", {"str", nullptr}, {{nullptr, nullptr}}, R"(LENGTH(str) = 0)"},
       {DEFAULT_SCHEMA, "notEmpty", {"str", nullptr}, {{nullptr, nullptr}}, R"(LENGTH(str) > 0)"},
diff --git a/chsql/test/sql/chsql.test b/chsql/test/sql/chsql.test
index 2212e6a..9ff906d 100644
--- a/chsql/test/sql/chsql.test
+++ b/chsql/test/sql/chsql.test
@@ -324,6 +324,16 @@ SELECT toDayOfMonth('2023-05-15'::DATE)
 ----
 15
 
+query I
+SELECT toUnixTimestamp('2023-05-15 10:30:45'::TIMESTAMP)
+----
+1684146645
+
+query I
+SELECT fromUnixTimestamp(1684146645)
+----
+2023-05-15 10:30:45
+
 # String Functions
 query I
 SELECT empty('')