Python Polars 0.20.14

🏆 Highlights

• Streaming outer joins (#14828)

⚠️ Deprecations

• Deprecate overwrite_schema parameter for DataFrame.write_delta (#14879)

🚀 Performance improvements

• improve join-asof materialization (#14884)
• Optimize chunked-id gather for binaryviews (#14878)
• rework scalar filter kernels (#14865)
• Reduce size of optional join-indexes (#14856)
• Streaming outer joins (#14828)
• Set sorted flag for cum_count on columns (#14849)

✨ Enhancements

• Sort decimal fields (#14649)
• Revert addition of __slots__ to Polars classes (#14857)
• Add fastexcel to show_versions (#14869)
• try-improve concurrency tuner (#14827)
• Streaming outer joins (#14828)
• Set sorted flag for cum_count on columns (#14849)
• support use of KùzuDB via pl.read_database (#14822)
• Ensure binview types are rle-encoded in parquet write (#14818)
• Disable timeouts (#14809)
• cleanup spill disks in process (#14807)
• Implement compression and skipping for binview IPC (#14789)

🐞 Bug fixes

• Fix DataFrame.min/max for decimals (#14890)
• Assert chunks are equal after physical cast to prevent OOB (#14873)
• not all cpu feature flag tests were mocked (#14864)
• Remove custom __reduce__ implementation on DataType object (#14778)
• Allow non-strict construction / initialization of Enum columns (#14728)
• Fix streaming parquet limit (#14783)

📖 Documentation

• Update contributing link (#14882)
• update to use ambiguous instead of use_earliest (#14820)
• Seperate asof from join strategy, change parameter from strategy to how in user guide (#14793)

🛠️ Other improvements

• Pin PyPI publish action to commit (#14896)
• reactivate argminmax simd (#14679)
• sort by 'idx' after outer join (#14867)
• run and fix pext64_polyfill test (#14852)
• add missing deprecation directive in groupby.count (#14817)
• Fix Makefile build commands (#14806)
• Bump ruff from 0.2.0 to 0.3.0 in /py-polars (#14800)
• Rename utils module to _utils to explicitly mark it as private (#14772)
• Add test coverage for _cpu_check module (#14768)

Thank you to all our contributors for making this release possible!
@MarcoGorelli, @Sol-Hee, @alexander-beedie, @c-peters, @deanm0000, @dependabot, @dependabot[bot], @eitsupi, @flisky, @geekvest, @mcrumiller, @mickvangelderen, @nameexhaustion, @orlp, @petrosbar, @ritchie46 and @stinodego