Changelog

59.2.0 - (2026-08-02)

Full Changelog

Enhancements

• arrow-avro: Deprecate object_store integration by @brancz in #10484
• chore(arrow): add unchecked array builder methods by @Rich-T-kid in #10440
• feat(arrow-ipc): add sans-IO stream encoder by @Phoenix500526 in #10277
• chore(arrow-cast): support suffix white space in arrow-cast parse by @Rich-T-kid in #10396
• feat(coalesce): add size function by @rluvaton in #10331
• fix(parquet): support mask filtering across skipped pages by @hhhizzz in #10288
• chore(arrow-cast): support white space prefixed parse for ints and floats by @Rich-T-kid in #10374
• chore(arrow-buffer): Make more of i256 available in const code by @AdamGS in #10363
• feat(arrow-array): Expose builder buffer capacity accessors by @Weijun-H in #10342
• feat(arrow-arith): Add interval multiplication by i64 by @peterxcli in #10336
• fix: Make parquet-index work with column paths by @korowa in #10330
• feat(arrow-csv): add support for parsing Float16 by @Glatzel in #10343
• Remove the unmaintained paste dependency from arrow by @Phoenix500526 in #10303
• chore: formalize the default map field names to match default arrow spec by @rluvaton in #10297
• feat(variant): Add variant_to_arrow Map type support by @sdf-jkl in #10307

Bug fixes

• fix(arrow-schema): Persist dictionary ordered flag on FFI schema import by @borchero in #10514
• fix(arrow-json): validate ListView child nullability by @dk3yyyy in #10486
• fix(arrow-json): validate map value nullability by @subotac in #10475
• avro: bound VLQDecoder::long against overlong varints by @STiFLeR7 in #10407
• arrow-row: Fix decode_fixed_size_list to apply the corrected_type step for dictionary children by @zhuqi-lucas in #10414
• [Variant] make value mandatory field for VariantArray/ShreddingState by @sdf-jkl in #10318
• fix off by one error for slice accounting by @Rich-T-kid in #10406
• fix: GenericByteViewArray::gc() drops inline views on the multi-buffer slow path by @adriangb in #10287
• fix(arrow-json): render coerced f32 as its value in the string decoder by @hareshkh in #10386
• fix(arrow-cast): make b64_encode reject invalid UTF-8 from misbehaving Engine impls by @bit2swaz in #10324
• fix: take FFI_ArrowArrayStream errno values from libc by @fornwall in #10299
• fix(arrow-data): allow full dictionary key range when concatenating by @raphaelroshan in #10323
• Don't panic on invalid c ffi schema name by @robert3005 in #10328
• fix(REE): check upfront if sorting empty array or 0 limit by @Jefffrey in #10293
• fix(arrow-avro): bound untrusted OCF block size and item counts by @miniex in #10237
• fix(arrow-array): disallow creating MapArray with nullable key field by @rluvaton in #10272
• fix: don't panic on ArrayData::try_new on bad input even when force_validate feature is on by @rluvaton in #10282

Performance improvements

• perf(parquet): slice up contiguous buffer for decimals and fsb by @MassivePizza in #10364
• feat(parquet): RowSelection can be backed by a BooleanBuffer by @haohuaijin in #10141
• perf(parquet): use Cursor in ZSTDCodec to avoid Vec alloc and copy by @MassivePizza in #10345
• optimize(parquet): Nested list batching child.write calls by @mapleFU in #10085
• perf(parquet): splice buffered pages with write_all instead of io::copy (adapts #10052) by @adriangb in #10353
• hoist calls for null_sentinel by @Rich-T-kid in #10356
• perf: speed up substring_by_char with an ASCII fast path and single-pass bounds by @andygrove in #10334
• Cache encoded field name in FieldEncoder by @MassivePizza in #10296
• perf: allow users to skip utf8 validation in arrow-row by @Rich-T-kid in #10319
• perf: Improve decimal addition and subtraction when scale is equal by @AdamGS in #10333
• optimize(interleave): implement interleave for FixedSizeList/Map type by @mapleFU in #10046
• Perf: Pre-size buffer allocations to avoid intermediate allocations by @Rich-T-kid in #10262
• Perf: create dictionary reader config and default unsafeflag to false by @Rich-T-kid in #10260
• Perf: Introduce zero copy path when tonic returns an aligned buffer by @Rich-T-kid in #10273
• Validate short view strings in separate buffer in arrow-row by @Jefffrey in #10250

Documentation updates

• chore(parquet): add link to ticket in object_store deprecation message by @alamb in #10502
• chore(avro): add link to ticket in object_store deprecation message by @alamb in #10503
• docs: clarify decimal negative scale behavior by @ByteBaker in #10304
• Docs: fix mutableArrayData comments by @Rich-T-kid in #10326
• docs: trim release schedule for released versions by @alamb in #10280
• Align parquet-geospatial crate docs with README by @paleolimbot in #10302

Miscellaneous

• Revert "chore: formalize the default map field names to match default arrow spec (#10297)" by @alamb in #10506
• parquet: deprecate explicit object_store integration by @brancz in #10354
• fix(parquet): restore opaque return type for RowSelection::iter by @haohuaijin in #10450
• refactor(parquet): split arrow_reader/selection into smaller modules by @haohuaijin in #10434
• chore: deduplicate filter nulls code in coalesce/filter kernel by @Jefffrey in #10348
• chore: remove parquet dependency from parquet_derive by @ByteBaker in #10327