What's Changed

• feat(datastore): mirror pandas iteration on LazyGroupBy / SeriesGroupBy by @wudidapaopao in #582
• Push unbounded ORDER BY to SQL for local from_df source by @wudidapaopao in #586
• test(datastore): require chdb-core>=26.5.0; un-xfail Array-in-Nullable cases it fixes by @ShawnChen-Sirius in #588

Full Changelog: v4.1.8...v4.1.9

What's Changed

• Rewrite chdb-datastore and chdb-sql skill descriptions for trigger accuracy by @ShawnChen-Sirius in #573
• Fix pre-load _chdb.abi3.so with RTLD_DEEPBIND to avoid host libstdc++ conflicts by @wudidapaopao in #572
• Fix explain() mislabeling pushed-down GroupBy/apply as Pandas by @auxten in #576
• Unify SQL builder behind a single _build_layer dispatcher by @auxten in #577
• Resolve 3 SQL builder bugs found by user-path tests by @auxten in #578

Full Changelog: v4.1.7...v4.1.8

What's Changed

• Upgrade macos arm64 runner to macos-15 by @wudidapaopao in #548
• Disable default memory limits by @wudidapaopao in #551
• Increase the timeout for macOS x86 CI to 120 minutes by @wudidapaopao in #554
• Add chdb vs pandas peak-memory benchmark by @wudidapaopao in #557
• Skip flaky groupby_agg_sum timing test on macOS x86_64 by @wudidapaopao in #559
• Fixes chdb-ds: UrlTableFunction.to_sql() emits HEADERS outside url() call by @nklmish in #563
• Optimize memory usage of DataStore by @wudidapaopao in #553
• Fix reading Parquet files from S3 by @mneedham in #562
• Migrate the PR-CI lint gate from flake8 to ruff by @ShawnChen-Sirius in #567

New Contributors

• @nklmish made their first contribution in #563
• @mneedham made their first contribution in #562
• @ShawnChen-Sirius made their first contribution in #567

Full Changelog: v4.1.6...v4.1.7

What's Changed

• Optimize streaming DataFrame execution for 80% memory reduction by @auxten in #545

Full Changelog: v4.1.5...v4.1.6

What's Changed

• Optimize count()/count_rows() to strip ORDER BY and use correct SQL for lazy ops by @auxten in #544

Full Changelog: v4.1.4...v4.1.5

What's Changed

• Add chdb/init.py to prevent broken module after upgrade by @auxten in #543

Full Changelog: v4.1.3...v4.1.4

What's Changed

• Add Get Started on Hex section to README by @auxten in #537
• Auto-detect ClickHouse Cloud secure connections by @auxten in #541
• Split agent skill into chdb-datastore and chdb-sql by @auxten in #542

Full Changelog: v4.1.2...v4.1.3

What's Changed

• Improve metadata access for pristine DataStore sources by @auxten in #536

Full Changelog: v4.1.1...v4.1.2

What's Changed

• Add chdb.datastore shim and fix chdb.version by @auxten in #535

Full Changelog: v4.1.0...v4.1.1

What's Changed

• Upgrade dep to chdb-core v26.1.0 @wudidapaopao in https://github.com/chdb-io/chdb-core/releases/tag/v26.1.0
• Add AI Agent Skill for chdb multi-source data analytics by @auxten in #522
• Fix crash when exiting by @wudidapaopao in #524
• Add AI Agent Skill for chdb multi-source data analytics by @auxten in #526
• Decouple chdb package from chdb-core by @wudidapaopao in #528
• Remove C++ source, build system, and legacy files by @wudidapaopao in #529
• Fix profiling not recording data for remote SQL and metadata queries by @auxten in #530

Full Changelog: v4.0.2...v4.1.0