π₯ Breaking changes
- Use a wrapper struct to store time zone (#22523)
π Performance improvements
- Allow predicate passing set_sorted (#22797)
- Increase default cross-file parallelism limit for new-streaming multiscan (#22700)
- Add elementwise execution mode for
list.eval (#22715)
- Support optimised init from non-dict
Mapping objects in from_records and frame/series constructors (#22638)
- Add streaming cross-join node (#22581)
- Switch off
maintain_order in group-by followed by sort (#22492)
β¨ Enhancements
- Format named functions (#22831)
- Implemented
list.filter (#22749)
- Support binaryoffset in search sorted (#22786)
- Add
nulls_equal flag to list/arr.contains (#22773)
- Allow named opaque functions for serde (#22734)
- Implement
LazyFrame.match_to_schema (#22726)
- Improved time-string parsing and inference (generally, and via the SQL interface) (#22606)
- Allow for
.over to be called without partition_by (#22712)
- Support
AnyValue translation from PyMapping values (#22722)
- Support optimised init from non-dict
Mapping objects in from_records and frame/series constructors (#22638)
- Add options to write Parquet field metadata (#22652)
- Allow casting
List<UInt8> to Binary (#22611)
- Allow setting of regex size limit using
POLARS_REGEX_SIZE_LIMIT (#22651)
π Bug fixes
- Fix reverse list type (#22832)
- Add type equality checking for relevant methods (#22802)
- Invalid output for
fill_null after when.then on structs (#22798)
- Don't panic for cross join with misaligned chunking (#22799)
- Panic on quantile over nulls in rolling window (#22792)
- Respect BinaryOffset metadata (#22785)
- Correct the output order of
PartitionByKey and PartitionParted (#22778)
- Fallback to non-strict casting for deprecated casts (#22760)
- Clippy on new stable version (#22771)
- Handle sliced out remainder for bitmaps (#22759)
- Don't merge
Enum categories on append (#22765)
- Fix unnest() not working on empty struct columns (#22391)
- Correct name in
unnest error message (#22740)
- Properly account for nulls in the
is_not_nan check made in drop_nans (#22707)
- Incorrect result from SQL
count(*) with partition by (#22728)
- Fix deadlock joining scanned tables with low thread count (#22672)
- Don't allow deserializing incompatible DSL (#22644)
- Incorrect null dtype from binary ops in empty group_by (#22721)
- Don't mark
str.replace_many with Mapping as deprecated (#22697)
- Gzip has maximum compression of 9, not 10 (#22685)
- Fix predicate pushdown of fallible expressions (#22669)
- Fix
index out of bounds panic when scanning hugging face (#22661)
- Fix polars crate not compiling when lazy feature enabled (#22655)
- Panic on
group_by with literal and empty rows (#22621)
- Return input instead of panicking if empty subset in
drop_nulls() and drop_nans() (#22469)
- Bump argminmax to 0.6.3 (#22649)
- DSL version deserialization endianness (#22642)
- Fix nested dtype row encoding (#22557)
- Allow Expr.round() to be called on integer dtypes (#22622)
- Fix panic when filtering based on row index column in parquet (#22616)
- WASM and PyOdide compile (#22613)
- Resolve
get() SchemaMismatch panic (#22350)
π Documentation
- Add pre-release policy (#22808)
- Fix broken link to service account page in Polars Cloud docs (#22762)
- Rework documentation for
drop/fill for nulls/nans (#22657)
π¦ Build system
- Patch pyo3 to disable recompilation (#22796)
π οΈ Other improvements
- Update Polars Rust versions (#22834)
- Cleanup
polars-python lifetimes (#22548)
- Fix
nix build (#22809)
- Fix flake.nix to work on macos (#22803)
- Remove unused dependencies in
polars-arrow (#22806)
- Unused variables on release build (#22800)
- Update cloud docs (#22624)
- Add proptest implementations for all Array types (#22711)
- Dispatch
.write_* to .lazy().sink_*(engine='in-memory') (#22582)
- Move to all optimization flags to
QueryOptFlags (#22680)
- Add test for
str.replace_many (#22615)
- Stabilize
sink_* (#22643)
- Add proptest for row-encode (#22626)
- Emphasize PolarsDataType::get_dtype is static-only (#22648)
- Use named fields for Logical (#22647)
- Update rust version in nix flake (#22627)
- Add a nix flake with a devShell and package (#22246)
- Use a wrapper struct to store time zone (#22523)
- Add
proptest testing for for parquet decoding kernels (#22608)
Thank you to all our contributors for making this release possible!
@IvanIsCoding, @JakubValtar, @Julian-J-S, @LucioFranco, @MarcoGorelli, @WH-2099, @alexander-beedie, @borchero, @bschoenmaeckers, @cmdlineluser, @coastalwhite, @etiennebacher, @florian-klein, @itamarst, @kdn36, @nameexhaustion, @nikaltipar, @orlp, @pavelzw, @r-brink, @ritchie46, @stijnherfst, @teotwaki, @timkpaine and @wence-