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Remove the legacy WASM playground that was incompatible with the current engine architecture.
- Extend LATERAL FLATTEN with options (path, outer, recursive, mode) - Add PIVOT transformation (row to columns via CASE WHEN) - Add UNPIVOT transformation (columns to rows via UNION ALL) - Add SAMPLE/TABLESAMPLE support (ROW count and percentage)
MERGE INTO: - Parse MERGE INTO ... USING ... ON ... WHEN MATCHED/NOT MATCHED - Handle UPDATE for matched rows and INSERT for non-matched rows - Support table recreation pattern for atomic updates Sequence: - Add Sequence struct with AtomicI64 for thread-safe incrementing - Implement CREATE/DROP SEQUENCE DDL - Support NEXTVAL and CURRVAL operations
- Add SAMPLE ROW tests - Add Sequence tests (CREATE, NEXTVAL, CURRVAL, DROP) - Add Sequence with custom START/INCREMENT tests
- Inline format string arguments - Add #[allow(dead_code)] for intentionally unused code - Add #[allow(deprecated)] for chrono API migration - Fix unused variable warnings with underscore prefix - Remove unreachable pattern in match expression
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Summary
Phase 7 の高度な SQL 機能を追加:
Changes
Test plan
cargo fmt --checkcargo clippy -- -D warningscargo test --workspace(195 tests)