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ajitpratap0 merged 1 commit into from
Nov 26, 2025
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docs: update CHANGELOG with LSP server and PR #129 changes #130

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28 changes: 28 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -8,6 +8,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased]

### Added
- **Language Server Protocol (LSP)** (CLI-009): Full LSP server implementation for IDE integration
- `textDocument/didOpen`, `textDocument/didChange` - Document synchronization
- `textDocument/publishDiagnostics` - Real-time SQL syntax error reporting
- `textDocument/hover` - Keyword/function documentation (60+ keywords)
- `textDocument/completion` - SQL autocomplete (100+ keywords, 20+ snippets)
- `textDocument/formatting` - SQL formatting support
- `textDocument/documentSymbol` - SQL statement outline
- `textDocument/signatureHelp` - Function signatures (20+ SQL functions)
- `textDocument/codeAction` - Quick fixes (add semicolon, uppercase keywords)
- Rate limiting (100 req/sec), content size limits, malformed request handling
- **MATERIALIZED CTE Support** (Phase 2.6): PostgreSQL-compatible `AS MATERIALIZED` and `AS NOT MATERIALIZED` syntax
- **Comprehensive Metrics System**: Thread-safe performance monitoring
- Parser operation metrics (duration, errors, statement counts)
- AST pool metrics (gets/puts/balance for AST, statement, expression pools)
- Tokenizer pool metrics with hit rate tracking
- **GROUPING SETS, ROLLUP, CUBE** (SQL-99 T431): Complete grouping operations support for advanced aggregations
- **MERGE Statements** (SQL:2003 F312): Full MERGE support with WHEN MATCHED/NOT MATCHED clauses
- **Materialized Views**: CREATE, DROP, REFRESH MATERIALIZED VIEW support
Expand All @@ -17,6 +32,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- **Subquery Support**: Scalar, table, correlated, EXISTS subqueries
- **NULLS FIRST/LAST**: ORDER BY null ordering (SQL-99 F851)

### Improved
- **AST Pool Architecture**: Iterative cleanup with work queue pattern to prevent stack overflow
- Added 8 new expression pools (Exists, Any, All, List, Unary, Extract, Position, Substring)
- MaxCleanupDepth and MaxWorkQueueSize limits for deeply nested expressions
- **Type Assertion Safety**: Added proper `ok` pattern checking in `alter.go` and `value.go`
- **Race Condition Fixes**: Fixed data races in metrics, documents, and watch modules
- **Tokenizer Column Calculation**: Consistent 1-based column numbers, never negative

### Fixed
- Critical type assertion panics in ALTER and VALUE parsing
- Race conditions in concurrent document management
- LSP hover returning nil instead of empty response

## [1.5.1] - 2025-11-15 - Phases 2-3 Test Coverage Completion

### 🎯 Phase 3 Complete: Token and Tokenizer Coverage Enhancement
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