- Add fkJson to wire protocol with serialization/deserialization
- Validate JSON/JSONB on INSERT/UPDATE via std/json
- Send real column type metadata in wire protocol responses
- Update all 4 clients (Nim, Python, JS, Rust) for JSON and columnTypes
- Implement multi-column index parser (CREATE INDEX idx ON t(a, b))
- Add ciColumns to AST nkCreateIndex
- Build composite index keys as table.col1.col2 with val1|val2
- Support multi-column exact match in SELECT for AND chains
- Implement non-recursive CTE execution via ctx.cteTables materialization
- Add tkRecursive token and parse WITH RECURSIVE
- Fix test isolation: use temp dirs for JOIN, migration, and RLS tests
- All tests passing (0 failures)
- Wire btree.scan() for BETWEEN, >, >=, <, <= conditions
- When a B-Tree index exists and WHERE clause is a range condition,
the executor now uses index range scan instead of full table scan
- Add 3 unit tests: BETWEEN, >, <=
- Update PLAN.md / PLAN_DONE.md
Critical fixes:
- B-Tree splitChild: fixed out-of-bounds on child.children.len (mid+1..len → mid+1..<len)
- Wire protocol: all deserializeValue cases now properly assign to result
- Wire protocol: fkBool/fkInt8 now increment pos after reading
- MVCC: write-write conflict now detected for completed transactions
- MVCC: commit only marks visible versions as deleted (not concurrent uncommitted)
- Lexer: buffer overrun on backslash escape at end of input — added bounds check
- Bulgarian/Russian stemmers: fixed UTF-8 byte offsets for Cyrillic suffixes (2 bytes per char)
High fixes:
- WebSocket: added missing std/tables import
- Raft: added randomize() call for election timeouts
- MemTable.get: binary search O(log n) instead of linear scan O(n)
Medium fixes:
- Zerocopy: string length now written as 4-byte int32 (was single byte)
- Raft appendEntries: guard against nextIdx underflow
- Columnar: null tracking with nulls seq on ColumnPtr
- Removed dead code in lexer readIdent (redundant true/false checks)
- Updated Bulgarian stemming test to match corrected byte offsets
All 214 tests pass across 48 suites with 0 failures.
Crash Recovery:
- WAL file scanning with magic/version/entry parsing
- REDO/UNDO analysis — identify committed vs uncommitted txns
- Summary reporting with entry/txn/apply status
Raft Election Timer:
- ElectionTimer with configurable timeout and tick/check/reset
- Automatic election start on follower timeout
- Candidate timeout restart on failed elections
CLI Autocomplete:
- Full autocomplete engine for commands and SQL keywords
- Suggest function for single/multi completions
- 60+ keywords (SELECT, FROM, WHERE, JOIN, GROUP BY, etc.)
ROADMAP.md:
- All completed items properly marked
- Updated status table — 9 out of 12 phases at 90%+
14 new tests (246 total, all passing)
Zero-Copy Serialization:
- Direct memory buffer with schema-based field offsets
- Write/read int32/int64/float/bool/string without copies
- FastMem copy operations (fastCopy, fastCopyFrom, slice)
- ZcTable for batch columnar records
Adaptive Query Execution:
- Cardinality estimation with exponential moving average
- Reoptimize triggers when actual/estimated row ratio exceeds threshold
- Plan caching with hash-based lookup
- Execution context with parallelism hints and explain
Distributed Transactions:
- Two-phase commit across multiple nodes
- Saga pattern with step-by-step execute/compensate
- DistTxnManager with cleanup lifecycle
Vector Batch Operations:
- batchInsert/batchSearch for HNSW and IVF-PQ
- IndexWatcher with auto-rebuild based on unindexed count and ratio
- Rebuild statistics tracking
26 new tests (222 total, all passing)
dimgigov