# Release Notes
This page summarizes the changes introduced in each ApexBase release, grouped by functional area.
## Unreleased
- No unreleased changes recorded yet. New features and fixes will be listed here before the next public release.
---
## [v1.21.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.21.0)
*2026-07-09*
[Compare with v1.20.1](https://github.com/BirchKwok/ApexBase/compare/v1.20.1...v1.21.0)
- Add Lance-like `BLOB` / `LARGE_BINARY` column support with descriptor-backed storage for inline, packed sidecar, and dedicated sidecar payloads
- Keep blob payloads lazy by storing compact descriptors in `.apex` column data and materializing Arrow `LargeBinary` values only when blob columns are projected
- Add Python helpers for single and batch payload access: `read_blob`, `read_blobs`, `read_blob_range`, `read_blob_ranges`, `read_blob_descriptor`, `read_blob_info`, and `read_blob_infos`
- Extend the Rust engine, SQL parser, Arrow conversion layer, Python bindings, WAL path, mmap path, and on-demand storage pipeline to handle `Blob` values end to end
- Add blob-focused performance coverage with `benchmarks/bench_blob_lance.py`, comparing ApexBase blob write/read/projection behavior against Lance Blob API
- Update the Rust crate and Python package version metadata to 1.21.0
---
## [v1.20.1](https://github.com/BirchKwok/ApexBase/releases/tag/v1.20.1)
*2026-06-30*
[Compare with v1.20.0](https://github.com/BirchKwok/ApexBase/compare/v1.20.0...v1.20.1)
- Add dynamic time-based column defaults in `CREATE TABLE`, including `DEFAULT CURRENT_DATE`, `DEFAULT CURRENT_TIMESTAMP`, `DEFAULT NOW`, and `DEFAULT UNIX_TIMESTAMP()`
- Add row-independent DEFAULT expressions, including arithmetic such as `DEFAULT (60 * 60)`, scalar functions such as `DEFAULT LOWER('ACTIVE')`, and typed casts such as `DEFAULT CAST('2026-01-02' AS DATE)`
- Add `INSERT DEFAULT VALUES` and `VALUES(DEFAULT, ...)` support so rows can explicitly use declared column defaults
- Apply defaults during `INSERT` for omitted columns and explicit `DEFAULT` values, with type-aware output for DATE, TIMESTAMP, string, integer, and floating-point columns
- Persist literal, expression-folded, and dynamic default definitions in on-demand table schemas so constraints survive save/reopen cycles
- Store SQL DATE and TIMESTAMP expression values through table and incremental storage paths by mapping them to their numeric backing representation
- Reject DEFAULT expressions that reference table columns or subqueries, keeping defaults row-independent and deterministic except for the supported time functions
- Add Rust and Python regression coverage for dynamic DEFAULT functions, constant-expression folding, cast defaults, `INSERT DEFAULT VALUES`, `VALUES(DEFAULT, ...)`, and invalid column-reference defaults
- Update Rust crate and Python package version metadata to 1.20.1
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Query Engine</td><td>4</td></tr>
<tr><td>Storage Engine</td><td>2</td></tr>
<tr><td>Tests</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v1.20.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.20.0)
*2026-06-23*
[Compare with v1.19.1](https://github.com/BirchKwok/ApexBase/compare/v1.19.1...v1.20.0)
- Add broad Hive complex SQL support across parser and executor for CTE-heavy ETL workloads, `INSERT OVERWRITE ... PARTITION`, Hive-style `LATERAL VIEW`, `EXPLODE`/`POSEXPLODE`, `STACK`, and richer expression handling
- Add optimized JSON projection fusion for repeated `GET_JSON_OBJECT` extraction and Hive array-splitting patterns
- Extend query signature detection and fast paths for complex Hive-style query shapes
- Improve aggregation, joins, SELECT, DDL, window execution, Python client, embedded API, and bindings to handle the new SQL coverage
- Add reproducible Hive complex SQL benchmark suite comparing ApexBase and DuckDB, including three large reference SQL workloads
- Add SQLite-equivalent SQL benchmark coverage for the same three Hive workload shapes, with ApexBase, DuckDB, and SQLite result-set equality checks across 100K, 500K, and 1M behavior rows
- Add comprehensive Hive complex SQL, CTE/EXPLAIN/INSERT SELECT, and storage architecture regression tests
- Add coding-agent prerequisite documentation in `precondition.md`
- Update version metadata to 1.20.0
- Enhance build and release workflows with tag-driven scheduled/manual builds, GitHub Release generation, release-note extraction by tag, historical pure-Python version releases, and Rust historical release backfills
- Simplify docs publishing/release-note generation flow and remove generated comments from release notes
- Simplify installation docs by removing Tool installation and GitHub Pages deployment sections
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>2</td></tr>
<tr><td>Project Config</td><td>3</td></tr>
<tr><td>Documentation</td><td>3</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Rust Embedded API</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>9</td></tr>
<tr><td>Storage Engine</td><td>1</td></tr>
<tr><td>Benchmarks</td><td>4</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Tests</td><td>3</td></tr>
</tbody>
</table></details>
---
## [v1.19.1](https://github.com/BirchKwok/ApexBase/releases/tag/v1.19.1)
*2026-06-11*
[Compare with v1.19.0](https://github.com/BirchKwok/ApexBase/compare/v1.19.0...v1.19.1)
- Fix macOS arm64 SIGSEGV crash on ApexStorage init via lazy imports (pyarrow, pandas, polars no longer loaded at import time)
- Fix weakref deadlock by switching `threading.Lock` to `threading.RLock` in `_InstanceRegistry`
- Fix CI pytest hangs in cross-process memtable tests
- Fix numeric range mmap scan offset handling in Python bindings
- Remove global warm-query GROUP BY / ORDER BY top-k static cache infrastructure from query executor
- Add pandas 3.x compatibility fixes in `to_pandas()`
- Rename `invalidate_query_caches` to `invalidate_read_caches` across storage backend
- Add `test_import_stability.py` regression tests and pytest `--timeout=120` config
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>2</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>1</td></tr>
<tr><td>Storage Engine</td><td>1</td></tr>
<tr><td>Benchmarks</td><td>4</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Tests</td><td>3</td></tr>
</tbody>
</table></details>
---
## [v1.19.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.19.0)
*2026-05-29*
[Compare with v1.18.0](https://github.com/BirchKwok/ApexBase/compare/v1.18.0...v1.19.0)
- Set up comprehensive MkDocs Material documentation site with GitHub Actions deployment
- Add FLOAT16 vector column type with f16→f32 byte decoding and ndarray/list conversion in Python bindings
- FTS index now backfills rows written through the Python `store()` API
- Async FTS backfill for tables with >100K rows (background thread, non-blocking)
- FTS backfill reads string columns directly from mmap for zero-copy performance
- Add new documentation pages: concepts, installation, performance, user guides
- Add HTAP roadmap document
- Replace large inline README section with cross-reference to new docs site
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>23</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>6</td></tr>
<tr><td>Storage Engine</td><td>5</td></tr>
<tr><td>Tests</td><td>4</td></tr>
</tbody>
</table></details>
---
## [v1.18.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.18.0)
*2026-05-20*
[Compare with v1.17.0](https://github.com/BirchKwok/ApexBase/compare/v1.17.0...v1.18.0)
- Add LIMIT and OFFSET support in SQL queries (parser, executor, Python client)
- Improve index building for streaming batches with batch-size limit
- Add mmap_scan numeric range and string equality filter support with LIMIT/row offset
- Add Python client fast-path cache for projected string equality with LIMIT/OFFSET
- Add `retrieve_projected_by_string_eq_limit` for direct mmap-backed projected scans in Python bindings
- Enhance embedded API `register_temp_table` with LIMIT/OFFSET support and temp directory cleanup
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Rust Embedded API</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>4</td></tr>
<tr><td>Storage Engine</td><td>2</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Tests</td><td>2</td></tr>
</tbody>
</table></details>
---
## [v1.17.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.17.0)
*2026-05-06*
[Compare with v1.16.0](https://github.com/BirchKwok/ApexBase/compare/v1.16.0...v1.17.0)
- Add temporary table support: `register_temp_table` and `drop_temp_table` for CSV, JSON, and Parquet files
- Temp tables materialize into native .apex format, auto-cleaned on DB drop
- Add window function execution module (`window.rs`)
- Enhance DuckDB result materialization compatibility (`to_arrow_table` instead of `to_arrow`)
- Improve aggregation, join, and SELECT execution paths with temp table awareness
- Add comprehensive temp table tests (CSV, JSON, SQL query access, cleanup, persistence)
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>4</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Rust Embedded API</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>10</td></tr>
<tr><td>Storage Engine</td><td>1</td></tr>
<tr><td>Benchmarks</td><td>1</td></tr>
<tr><td>Tests</td><td>2</td></tr>
</tbody>
</table></details>
---
## [v1.16.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.16.0)
*2026-05-03*
[Compare with v1.15.0](https://github.com/BirchKwok/ApexBase/compare/v1.15.0...v1.16.0)
- Add COPY TO export support: tables exportable to CSV, TSV, JSON, NDJSON with configurable options
- Add JSON mutation functions: JSON_SET, JSON_INSERT, JSON_REPLACE, JSON_REMOVE
- Add view-aware SQL routing in Python client for persisted views
- Add comprehensive test suite for SQL view, COPY, and JSON operations
- Optimize expression evaluator with string-based LIKE, GLOB, and REGEXP improvements
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Query Engine</td><td>6</td></tr>
<tr><td>Benchmarks</td><td>1</td></tr>
<tr><td>Tests</td><td>7</td></tr>
</tbody>
</table></details>
---
## [v1.15.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.15.0)
*2026-05-02*
[Compare with v1.14.0](https://github.com/BirchKwok/ApexBase/compare/v1.14.0...v1.15.0)
- WAL-backed transaction durability: commits write TxnBegin/TxnCommit to per-table WAL with optional fsync
- Adaptive row group size for on-demand storage with narrow/wide table tests
- Add query signature fast paths: projected point lookup, ID batch, full scan, string/numeric range filter
- Zone map-based string filtering to skip irrelevant row groups during equality scans
- Single-pass filtered string aggregation on mmap tables
- Delta string index caching and row count caching for repeated read performance
- Separate write_file and delta_file handles with atomic sync-pending bitmask tracking
- Add `build.rs` for macOS Python library rpath linking
- Remove old test infrastructure (`run_tests.py`, `test/README`)
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Other</td><td>5</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>4</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Data Layer</td><td>5</td></tr>
<tr><td>Rust Embedded API</td><td>1</td></tr>
<tr><td>Arrow Flight gRPC</td><td>2</td></tr>
<tr><td>Full-Text Search</td><td>1</td></tr>
<tr><td>Library Core</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>4</td></tr>
<tr><td>Query Engine</td><td>18</td></tr>
<tr><td>Scaling & Sharding</td><td>5</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>3</td></tr>
<tr><td>Storage Engine</td><td>24</td></tr>
<tr><td>Table Catalog</td><td>5</td></tr>
<tr><td>Transaction Manager</td><td>4</td></tr>
<tr><td>Benchmarks</td><td>1</td></tr>
<tr><td>Build System</td><td>1</td></tr>
<tr><td>Tests</td><td>20</td></tr>
</tbody>
</table></details>
---
## [v1.14.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.14.0)
*2026-03-27*
[Compare with v1.13.0](https://github.com/BirchKwok/ApexBase/compare/v1.13.0...v1.14.0)
- Add parallel multi-predicate mmap scan with zone map pruning and rayon-based predicate evaluation
- Add parallel column extraction via rayon for 2+ columns and 500+ rows
- Add column projection support to skip unrequested columns during Arrow batch construction
- Add Binary column type support (ColBuf::Bin, ColBuf::FixedVec, BinaryArray output)
- Fix col=value filter pushdown logic with type-specific handling
- Add 3 new benchmarks (numeric IN, OR cross-column, numeric OR)
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Query Engine</td><td>2</td></tr>
<tr><td>Storage Engine</td><td>3</td></tr>
<tr><td>Benchmarks</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v1.13.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.13.0)
*2026-03-26*
[Compare with v1.12.0](https://github.com/BirchKwok/ApexBase/compare/v1.12.0...v1.13.0)
- Fix `ApexClient` with `drop_if_exists=True` to always create fresh storage instead of reusing shared storage
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v1.12.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.12.0)
*2026-03-26*
[Compare with v1.11.0](https://github.com/BirchKwok/ApexBase/compare/v1.11.0...v1.12.0)
- Add backtick-quoted identifier parsing (`identifier`, Hive/MySQL style) to SQL parser
- Add unit tests for backtick parsing: SELECT, WHERE, ORDER BY, and unterminated identifier error
- Update docs to document quoted identifier syntax
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>4</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Query Engine</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v1.11.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.11.0)
*2026-03-18*
[Compare with v1.10.0](https://github.com/BirchKwok/ApexBase/compare/v1.10.0...v1.11.0)
- Add x86_64 AVX2+FMA SIMD kernels for L2, L1, Linf, inner_product, cosine distance functions
- Improve Windows mmap prefault with 3-tier strategy (single-threaded, rayon-parallel, PrefetchVirtualMemory)
- Add Windows atomic rename retries with backoff, engine cache invalidation before writes
- Increase Windows WAL buffer size from 64KB to 512KB
- Remove `benchmarks/stress_test.py`
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Query Engine</td><td>1</td></tr>
<tr><td>Storage Engine</td><td>3</td></tr>
<tr><td>Benchmarks</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v1.10.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.10.0)
*2026-03-18*
[Compare with v1.9.0](https://github.com/BirchKwok/ApexBase/compare/v1.9.0...v1.10.0)
- Drop V3 file format compatibility — all operations require V4 footer
- Replace heap-based GROUP BY with HashMap accumulator supporting SUM/COUNT/AVG
- Add `read_fixed_scattered_optimized` with row-group batching for FixedList/Float16List scatter reads
- Add `bench_filter_group_order.py` and `bench_group_by_detail.py` benchmark scripts
- Rename internal V3-specific constants (MAGIC_V3→MAGIC, HEADER_SIZE_V3→HEADER_SIZE, etc.)
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>4</td></tr>
<tr><td>Storage Engine</td><td>11</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Benchmarks</td><td>2</td></tr>
</tbody>
</table></details>
---
## [v1.9.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.9.0)
*2026-03-17*
[Compare with v1.8.0](https://github.com/BirchKwok/ApexBase/compare/v1.8.0...v1.9.0)
- Add Rust Embedded API module (`Database`/`Table` structs) for pure-Rust usage without Python
- Add query signature/caching system for deduplicating identical queries
- Add concurrent query scheduler for parallel batch execution
- Add vectorized hash join implementation
- Add concurrent storage access with shared table handles and multi-client support
- Add FLOAT16_VECTOR column type with f16-quantized storage and all distance metrics
- Add `batch_topk_distance` Python API for batched multi-query vector search
- Add `execute_batch` Python API for parallel SQL execution via scheduler
- Add schema evolution: `add_column`/`drop_column` on existing tables via Rust Embedded API
- Add new docs: RUST_EMBEDDED_API.md, FLOAT16_VECTOR_GUIDE.md, ENGINEERING_GUIDELINES.md
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Other</td><td>4</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>6</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Data Layer</td><td>1</td></tr>
<tr><td>Rust Embedded API</td><td>1</td></tr>
<tr><td>Library Core</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>14</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>1</td></tr>
<tr><td>Storage Engine</td><td>14</td></tr>
<tr><td>Benchmarks</td><td>13</td></tr>
<tr><td>Tests</td><td>5</td></tr>
</tbody>
</table></details>
---
## [v1.8.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.8.0)
*2026-02-25*
[Compare with v1.7.0](https://github.com/BirchKwok/ApexBase/compare/v1.7.0...v1.8.0)
- Add `vector_ops.rs` module implementing 6 vector distance functions (L2, L1, Linf, cosine, inner_product, array_distance)
- Add TopK vector search via `ORDER BY array_distance(col, [query]) LIMIT k`
- Add SQL INSERT with vector array literals and string literal auto-coercion
- Add Python `topk_distance()` API with 6 distance metrics, custom column names, and numpy support
- Add `SQL explode_rename(topk_distance(...))` for SQL-based top-k with JOIN
- Add `set_compression`/`get_compression` API (LZ4, Zstd)
- Add `batch_replace` API for bulk row replacement by ID
- Add `optimize()` method to compact storage and `get_column_dtype` for schema introspection
- Add new benchmarks: bench_vector.py, bench_vs_polars.py, bench_no_cache.py, bench_simsimd.py
- Add `test_vector_ops.py` with 1000+ lines of distance tests cross-validated against numpy
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Other</td><td>2</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>3</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Data Layer</td><td>2</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>12</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>1</td></tr>
<tr><td>Storage Engine</td><td>12</td></tr>
<tr><td>Benchmarks</td><td>5</td></tr>
<tr><td>Tests</td><td>5</td></tr>
</tbody>
</table></details>
---
## [v1.7.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.7.0)
*2026-02-23*
[Compare with v1.6.0](https://github.com/BirchKwok/ApexBase/compare/v1.6.0...v1.7.0)
- Add full-text search (FTS) module with `CREATE FTS INDEX` SQL syntax and `search_text()` Python API
- Rewrite window function engine: ROW_NUMBER, RANK, DENSE_RANK, LAG, LEAD, FIRST_VALUE, SUM/AVG windows
- Fix NULL semantics: LAG/LEAD return NULL at partition boundaries, COUNT(col) excludes NULLs
- Add set operations: UNION (dedup), UNION ALL, INTERSECT, EXCEPT with multi-column variants
- Add subquery support: scalar subqueries, IN/NOT IN, correlated EXISTS
- Add multiple CTE support with chaining and CTE+window function combinations
- Add CASE expressions with WHEN/THEN/ELSE, including CASE in GROUP BY
- Add comprehensive test suites: test_comprehensive_coverage.py, test_sql_edge_cases.py
- Add bench_fts.rs example for FTS in Rust
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Full-Text Search</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>11</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>1</td></tr>
<tr><td>Storage Engine</td><td>8</td></tr>
<tr><td>Benchmarks</td><td>1</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Tests</td><td>4</td></tr>
</tbody>
</table></details>
---
## [v1.6.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.6.0)
*2026-02-21*
[Compare with v1.5.0](https://github.com/BirchKwok/ApexBase/compare/v1.5.0...v1.6.0)
- Add in-place UPDATE execution via `scan_and_update_inplace` — writes directly to disk without full rewrite
- Rewrite delta store from log-based to map-based (`HashMap`) preventing unbounded log growth
- Add `delta_batch_update_rows` for multiple cell-level updates in a single lock acquisition
- Add `scan_numeric_range_mmap_with_ids` — combined WHERE column scan + ID retrieval in one pass
- Add pending delta application (`apply_pending_deltas_in_place`) for save_v4() baking
- Add DELETE + window function + FTS benchmarks
- Add warm no-gc benchmark mode for measuring without GC interference
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Query Engine</td><td>2</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>1</td></tr>
<tr><td>Storage Engine</td><td>6</td></tr>
<tr><td>Benchmarks</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v1.5.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.5.0)
*2026-02-20*
[Compare with v1.4.0](https://github.com/BirchKwok/ApexBase/compare/v1.4.0...v1.5.0)
- Add `open_for_read_with_file` to save 2 syscalls by reusing pre-opened File handle
- Add fast path for SELECT COUNT(*) — bypasses SQL parser, reads directly from `active_row_count` atomic
- Add batch Arrow column → Python list converter (`arrow_col_to_pylist`) eliminating per-element dispatch
- Refactor LRU cache with AtomicU64 for lock-free access time tracking
- Add regex pre-compilation in Python client for faster SQL parsing
- Merge File::open + metadata into a single syscall in `get_cached_backend`
- Add 8 new benchmarks: full scan→pandas, multi-GROUP BY, LIKE, multi-condition, multi-ORDER BY, COUNT DISTINCT, IN filter, UPDATE
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>1</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>1</td></tr>
<tr><td>Storage Engine</td><td>3</td></tr>
<tr><td>Benchmarks</td><td>2</td></tr>
</tbody>
</table></details>
---
## [v1.4.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.4.0)
*2026-02-20*
[Compare with v1.3.0](https://github.com/BirchKwok/ApexBase/compare/v1.3.0...v1.4.0)
- Add FTS auto-sync on INSERT: newly inserted rows automatically indexed
- Add FTS auto-sync on DELETE: deleted rows removed from FTS indexes
- Add CREATE FTS INDEX backfill: existing rows indexed on creation
- Add ALTER FTS INDEX ... ENABLE backfill support
- Add cross-database SHOW FTS INDEXES with enabled/disabled status
- Remove roadmap/planning docs (HTAP_GAP_ANALYSIS.md, HTAP_ROADMAP.md, P0_IMPLEMENTATION_PLAN.md)
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>7</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Query Engine</td><td>4</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>1</td></tr>
<tr><td>Tests</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v1.3.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.3.0)
*2026-02-20*
[Compare with v1.2.0](https://github.com/BirchKwok/ApexBase/compare/v1.2.0...v1.3.0)
- Add SQL-native full-text search DDL: CREATE/DROP/ALTER FTS INDEX, SHOW FTS INDEXES
- Add FTS query predicates: MATCH('query') and FUZZY_MATCH('query') in WHERE clauses
- Add FTS_GUIDE.md documentation (478 lines) covering architecture, SQL usage, and configuration
- Upgrade nanofts to 0.5.0 with zero-copy Arrow indexing (~3.3M docs/s throughput)
- Add global FtsManager registry and fts_config.json persistence
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>5</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Full-Text Search</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>4</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v1.2.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.2.0)
*2026-02-20*
[Compare with v1.1.0](https://github.com/BirchKwok/ApexBase/compare/v1.1.0...v1.2.0)
- Add multi-database support with isolated subdirectories, `use_database()`, and cross-database SQL
- Add Arrow Flight gRPC server with zero-copy columnar data transfer
- Add unified `apexbase-serve` CLI launching both PG Wire and Flight servers
- Add bench_flight.py and bench_pg_wire.py comparing server protocol performance
- Add mmap-based aggregation path, per-instance backend caching, SQL parse caching
- Add TCP_NODELAY on server sockets and per-connection USE/\c database switching
- Add comprehensive multi-database test suite (496 lines)
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>3</td></tr>
<tr><td>Python Package</td><td>3</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Arrow Flight gRPC</td><td>2</td></tr>
<tr><td>Library Core</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>3</td></tr>
<tr><td>Query Engine</td><td>7</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>4</td></tr>
<tr><td>Storage Engine</td><td>8</td></tr>
<tr><td>Benchmarks</td><td>5</td></tr>
<tr><td>Tests</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v1.1.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.1.0)
*2026-02-10*
[Compare with v1.0.0](https://github.com/BirchKwok/ApexBase/compare/v1.0.0...v1.1.0)
- Add Extended Query Handler for prepared statement support
- Add SQL comment stripping (-- and /* */) before statement type detection
- Add proper PostgreSQL command tags (INSERT oid+rows, DELETE rows, etc.)
- Add pg_catalog support for pg_tables, pg_stat_user_tables
- Improve DROP TABLE with cleanup of WAL, delta, deltastore files
- Add line comment (--) support to SQL parser
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>3</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>3</td></tr>
</tbody>
</table></details>
---
## [v1.0.0](https://github.com/BirchKwok/ApexBase/releases/tag/v1.0.0)
*2026-02-10*
[Compare with v0.6.0](https://github.com/BirchKwok/ApexBase/compare/v0.6.0...v1.0.0)
- Release v1.0 — first stable release
- Add PostgreSQL wire protocol server with DBeaver/psql/DataGrip/pgAdmin/Navicat support
- Add pg_catalog compatibility layer (pg_namespace, pg_database, pg_class, pg_attribute, information_schema)
- Add Arrow type→PostgreSQL type mapping and FieldInfo generation
- Major README rewrite with HTAP feature list (transactions, MVCC, indexing, window functions, 70+ built-in functions)
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Python Package</td><td>2</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Library Core</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>2</td></tr>
<tr><td>Query Engine</td><td>1</td></tr>
<tr><td>PostgreSQL Wire Protocol</td><td>4</td></tr>
</tbody>
</table></details>
---
## [v0.6.0](https://github.com/BirchKwok/ApexBase/releases/tag/v0.6.0)
*2026-02-09*
[Compare with v0.5.0](https://github.com/BirchKwok/ApexBase/compare/v0.5.0...v0.6.0)
- Split monolithic executor.rs (~11554 lines) into modular submodules (aggregation, ddl, dml, expressions, joins, select, window, tests)
- Split monolithic on_demand.rs (~10072 lines) into modular submodules (agg_wal, arrow_io, header, mmap_scan, read_write, storage_core, tests, types)
- Add window function support (ROW_NUMBER, RANK, DENSE_RANK, NTILE, LAG, LEAD, FIRST_VALUE, LAST_VALUE)
- Add CTE (WITH ... AS), EXPLAIN/ANALYZE query plans, UNION/UNION ALL support
- Add concurrency stress test, constraint tests, DuckDB memory comparison tests
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>3</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Data Layer</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>13</td></tr>
<tr><td>Storage Engine</td><td>18</td></tr>
<tr><td>Transaction Manager</td><td>2</td></tr>
<tr><td>Benchmarks</td><td>1</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Tests</td><td>9</td></tr>
</tbody>
</table></details>
---
## [v0.5.0](https://github.com/BirchKwok/ApexBase/releases/tag/v0.5.0)
*2026-02-07*
[Compare with v0.4.2](https://github.com/BirchKwok/ApexBase/compare/v0.4.2...v0.5.0)
- Add query planner with OLTP (index-based) and OLAP (vectorized) routing
- Add indexing subsystem: B-Tree, hash index, index manager with CREATE/DROP/REINDEX SQL
- Add transaction support: transaction context, manager, OCC conflict detection
- Add MVCC engine: snapshot isolation, row versioning, garbage collection
- Add DeltaStore cell-level updates with merge-commit compaction
- Add global storage engine registry with LRU cache
- Add HTAP architecture support with scaling module (partition, shard, node, router)
- Rewrite on_demand.rs (~4000→9939 lines) with full columnar storage, LZ4/Zstd compression, WAL durability
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>8</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Library Core</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>5</td></tr>
<tr><td>Scaling & Sharding</td><td>5</td></tr>
<tr><td>Storage Engine</td><td>17</td></tr>
<tr><td>Transaction Manager</td><td>4</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Benchmarks</td><td>1</td></tr>
<tr><td>Tests</td><td>23</td></tr>
</tbody>
</table></details>
---
## [v0.4.2](https://github.com/BirchKwok/ApexBase/releases/tag/v0.4.2)
*2026-02-02*
[Compare with v0.4.1](https://github.com/BirchKwok/ApexBase/compare/v0.4.1...v0.4.2)
- Add persistent Row Group Bloom Filters for fast row group skipping
- Add DirectCountAgg for fast counting aggregation using direct array indexing
- Remove DuckDB comparison benchmarks and legacy test scripts
- Improve on_demand storage with per-column dictionary caching and SIMD filter scanning
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Other</td><td>13</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>2</td></tr>
<tr><td>Query Engine</td><td>2</td></tr>
<tr><td>Storage Engine</td><td>4</td></tr>
</tbody>
</table></details>
---
## [v0.4.1](https://github.com/BirchKwok/ApexBase/releases/tag/v0.4.1)
*2026-02-01*
[Compare with v0.4.0](https://github.com/BirchKwok/ApexBase/compare/v0.4.0...v0.4.1)
- Add comprehensive documentation: API_REFERENCE.md (865 lines), EXAMPLES.md, QUICK_START.md
- Add benchmark suite comparing ApexBase vs DuckDB
- Add bloom filter-based row group skipping in storage engine
- Add `list_databases()` method to Python client
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Documentation</td><td>5</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>2</td></tr>
<tr><td>Storage Engine</td><td>2</td></tr>
<tr><td>Other</td><td>6</td></tr>
<tr><td>Tests</td><td>3</td></tr>
</tbody>
</table></details>
---
## [v0.4.0](https://github.com/BirchKwok/ApexBase/releases/tag/v0.4.0)
*2026-02-01*
[Compare with v0.3.0](https://github.com/BirchKwok/ApexBase/compare/v0.3.0...v0.4.0)
- Add adaptive multi-column filter strategy with smart column ordering
- Add SIMD-accelerated take/gather operations (AVX2 on x86, NEON on ARM)
- Add fast path for Complex (Filter+Group+Order) queries
- Add `delete(where=)` support to Python client
- Refactor __init__.py (~1412→157 lines) by delegating to client.py
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>2</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>2</td></tr>
<tr><td>Query Engine</td><td>5</td></tr>
<tr><td>Storage Engine</td><td>2</td></tr>
<tr><td>Tests</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v0.3.0](https://github.com/BirchKwok/ApexBase/releases/tag/v0.3.0)
*2026-01-29*
[Compare with v0.2.3](https://github.com/BirchKwok/ApexBase/compare/v0.2.3...v0.3.0)
- Add DML support (INSERT, DELETE, UPDATE, TRUNCATE) to SQL executor
- Add DDL support (CREATE/DROP/ALTER TABLE) with schema management
- Add comprehensive DDL/DML test suite (~1957 lines)
- Add performance optimization fast paths for string/numeric/multi-condition filters
- Translate all documentation from Chinese to English
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>2</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>1</td></tr>
<tr><td>Query Engine</td><td>4</td></tr>
<tr><td>Storage Engine</td><td>4</td></tr>
<tr><td>Tests</td><td>2</td></tr>
</tbody>
</table></details>
---
## [v0.2.3](https://github.com/BirchKwok/ApexBase/releases/tag/v0.2.3)
*2026-01-27*
[Compare with v0.2.2](https://github.com/BirchKwok/ApexBase/compare/v0.2.2...v0.2.3)
- Add multi-platform wheel builds (Windows/macOS/Linux) for Python 3.9-3.13
- Refactor GitHub Actions: separate Linux manylinux build job
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>2</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v0.2.2](https://github.com/BirchKwok/ApexBase/releases/tag/v0.2.2)
*2026-01-27*
[Compare with v0.2.1](https://github.com/BirchKwok/ApexBase/compare/v0.2.1...v0.2.2)
- Add maturin multi-platform wheel builds with Python interpreter path detection
- Remove old technical design docs
- Improve README with installation, usage, and benchmarks
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>5</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v0.2.1](https://github.com/BirchKwok/ApexBase/releases/tag/v0.2.1)
*2026-01-27*
[Compare with v0.2.0](https://github.com/BirchKwok/ApexBase/compare/v0.2.0...v0.2.1)
- Version bump and minor CI fixes
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v0.2.0](https://github.com/BirchKwok/ApexBase/releases/tag/v0.2.0)
*2026-01-27*
[Compare with v0.1.0](https://github.com/BirchKwok/ApexBase/compare/v0.1.0...v0.2.0)
- Complete core rewrite from Python to Rust with PyO3 bindings
- Add Rust-native columnar storage engine with .apex file format
- Add Rust-native SQL query executor with vectorized Arrow processing and Cranelift JIT
- Add Arrow IPC zero-copy data bridge between Rust and Python
- Add comprehensive test suite (~12000 lines)
- Replace DuckDB storage with custom columnar storage engine
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Other</td><td>17</td></tr>
<tr><td>Project Config</td><td>2</td></tr>
<tr><td>Documentation</td><td>5</td></tr>
<tr><td>Python Package</td><td>1</td></tr>
<tr><td>Python Client</td><td>1</td></tr>
<tr><td>Data Layer</td><td>5</td></tr>
<tr><td>Full-Text Search</td><td>1</td></tr>
<tr><td>Library Core</td><td>1</td></tr>
<tr><td>Python Bindings</td><td>2</td></tr>
<tr><td>Query Engine</td><td>7</td></tr>
<tr><td>Storage Engine</td><td>4</td></tr>
<tr><td>Table Catalog</td><td>5</td></tr>
<tr><td>Tests</td><td>17</td></tr>
</tbody>
</table></details>
---
## [v0.1.0](https://github.com/BirchKwok/ApexBase/releases/tag/v0.1.0)
*2025-08-02*
[Compare with v0.0.2](https://github.com/BirchKwok/ApexBase/compare/v0.0.2...v0.1.0)
- Replace SQLite storage with DuckDB-based storage engine
- Add full-text search module with index creation, fuzzy matching, and snippets
- Rewrite ApexClient with caching, auto-switch, list_tables, close methods
- Add ResultView with to_dict/to_pandas/to_arrow converters
- Add comprehensive test suite (test_apex_client.py, 622 lines)
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>Other</td><td>14</td></tr>
<tr><td>Documentation</td><td>1</td></tr>
<tr><td>Project Config</td><td>1</td></tr>
<tr><td>Tests</td><td>4</td></tr>
</tbody>
</table></details>
---
## [v0.0.2](https://github.com/BirchKwok/ApexBase/releases/tag/v0.0.2)
*2025-01-25*
[Compare with v0.0.1](https://github.com/BirchKwok/ApexBase/compare/v0.0.1...v0.0.2)
- Add package metadata: Apache-2.0 license, PyPI classifiers for Python 3.9–3.13
- Fix GitHub Actions CI/CD pipeline for PyPI publishing
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
<tr><td>Other</td><td>1</td></tr>
<tr><td>Project Config</td><td>1</td></tr>
</tbody>
</table></details>
---
## [v0.0.1](https://github.com/BirchKwok/ApexBase/releases/tag/v0.0.1)
*2025-01-25*
- Initial release — project bootstrap
- ApexClient Python class for database management (CRUD operations)
- SQLite-based Storage with batch operations and LimitedDict LRU cache
- Query class with SQL-like filter parsing (WHERE, ORDER BY, LIMIT, BETWEEN, LIKE, IN)
- SQLParser/SQLGenerator modules for expression handling
- GitHub Actions CI/CD pipeline setup
<details>
<summary><b>Changed files by module</b></summary>
<table>
<thead>
<tr><th>Module</th><th>Files changed</th></tr>
</thead>
<tbody>
<tr><td>CI/CD</td><td>1</td></tr>
</tbody>
</table></details>
---