apache/arrow

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Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics

Stars: 17.1k
Forks: 4.3k
Open beginner issues: 0
Indexed issues: 2.2k
Avg merge: 3d 20h
Merged PRs (30d): 94

Dominant language: C++
License: Apache-2.0
Last GitHub push: Sep 12, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

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2147 open issues indexed

[C++][Gandiva] Provide common transcendental / bitwise operations Open

Component: Gandiva Type: enhancement

apache/arrow#34068 · 2 comments · 1 reaction · 1 assignee · Indexed Sep 14, 2026
[C++] strptime fails to parse with %z on MacOS when zone offset includes ":" Open

Component: C++ Type: bug

apache/arrow#34081 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Expose Arrow's plan execution helpers (Finishes, ResultWith) Open

Component: C++ Type: enhancement

apache/arrow#34083 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][C++] Support CSV compression in write_dataset Open

Component: C++ Component: Format Component: Python Type: enhancement

apache/arrow#34085 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Gandiva] Extend cast operators for int8 Open

Component: Gandiva Type: enhancement

apache/arrow#34117 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Allow converting strings to dates without using datetimes as an intermediate step Open

Component: C++ Type: enhancement

apache/arrow#34121 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Dev][C++] Don't use GitHub archive files with checksums Open

Component: C++ Component: Developer Tools Type: bug

apache/arrow#34130 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Ignore corrupted or invalid statistics Open

Component: C++ Component: Parquet Type: bug

apache/arrow#34139 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] Specifying schema does not prevent arrow from reading metadata on every single parquet? Open

Component: Parquet Component: Python Type: bug

apache/arrow#34145 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Binary search for sorted tables. Open

Component: C++ Component: Python Type: enhancement

apache/arrow#34153 · 4 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[Python] `is_null(nan_is_null=True)` does not work with only NaN's Open

Component: Python Type: bug

apache/arrow#34162 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Allow pyarrow.compute.mode to include null count Open

Component: C++ Component: Python Type: enhancement

apache/arrow#34173 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Finish basic Run-End Encoded arrays support in C++ Open

Component: C++ Type: enhancement

apache/arrow#34176 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] Expose more metadata in pyarrow.parquet.ParquetFile.metadata Open

Component: Python Type: enhancement

apache/arrow#34180 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Skip PyArrow tests when a testing component is not installed Open

Component: Python Type: enhancement

apache/arrow#34183 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[Python] Extract partition list from pyarrow.dataset.ParquetFileFragment object Open

Component: Python Type: enhancement

apache/arrow#34212 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[FlightRPC][C++] Support implementing simple endpoints with async API Open

Component: C++ Component: FlightRPC Type: enhancement

apache/arrow#34221 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++] Avoid producing run-end encoded arrays with runs that have a length longer than INT_MAX Open

Component: C++ Type: enhancement

apache/arrow#34237 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Conversion of pyArrow table to pandas fails with error: ArrowException: Unknown error: Wrapping Q� failed Open

Component: Python Type: bug

apache/arrow#34239 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Schema inference reorders fields in nested structs Open

Component: Python Type: bug

apache/arrow#34250 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Pass extra kwargs to S3 Pyarrow Filesystem Open

Component: Python Type: enhancement

apache/arrow#34253 · 4 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[Python] pyarrow does not disable SIMD CPU optimizations when set to do so. Open

Component: Python Type: bug

apache/arrow#34277 · 26 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] SIGABRT: terminate called without an active exception (core dumped) Open

Component: Parquet Component: Python Type: bug

apache/arrow#34314 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] `pa.compute.is_null()` returns incorrect answer for dense union arrays and segfaults for dense union scalars Open

Component: Python good-second-issue Priority: Critical Type: bug

apache/arrow#34315 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[R] v11.0.0.2 extremely slow with parquet files written in v9.0.0 Open

Component: R Priority: Critical Type: bug

apache/arrow#34319 · 11 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++] Arrow version 5 or later fails to compile/link with gcc version 7 (or earlier) Open

Component: C++ Type: bug

apache/arrow#34341 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Options for handling non-decomposable aggregate functions Open

Component: C++ Type: enhancement

apache/arrow#34387 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Dev] Some assignments from the PR bot fail due to anti-spam protection Open

Component: Developer Tools Type: bug

apache/arrow#34389 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Flight] Unable to receive error status from DoPut Open

Component: C++ Type: bug

apache/arrow#34402 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Named lists cannot be serialized to a map column Open

Component: R Priority: Medium Status: needs champion Type: bug

apache/arrow#34409 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Converting python array to TimestampArray with naive datetime and datetime with various timezones Open

Component: Python Type: bug

apache/arrow#34412 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python]: Possible to evaluate `pyarrow.compute.Expression` without filter? Open

Component: Python Type: usage

apache/arrow#34433 · 4 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++][Python] A metadata standard for sorted datasets. Open

Component: C++ Component: Python Type: enhancement

apache/arrow#34451 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Split arrow::FileReader::ReadRowGroups() to 2 methods for flexible async IO Open

Component: C++ Type: enhancement

apache/arrow#34460 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Format][FlightRPC] Transfer FlightData in pieces Open

Component: FlightRPC Component: Format Status: needs champion Type: enhancement

apache/arrow#34485 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Add pyarrow.TableGroupBy() subtables Open

Component: Python Type: enhancement

apache/arrow#34491 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] GcsFileSystem either can't list a particular bucket or hangs indefinitely when doing so Open

Component: C++ Type: bug

apache/arrow#34525 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs][FlightRPC] Document Flight error status mappings Open

Component: Documentation Component: FlightRPC Type: enhancement

apache/arrow#34544 · 4 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[Python] Best practice for adding a column for `__filename` without adding a duplicate field? Open

Component: Python Type: bug

apache/arrow#34554 · 8 comments · 3 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] 'arrow::Compression::type' naming conflicts occur easily Open

Component: C++ Type: enhancement

apache/arrow#34556 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] Round-trip type-conversion bug list object in pd.DataFrame Open

Component: Python Type: bug

apache/arrow#34574 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Pyarrow DictionaryArray.dictionary_decode mangling strings Open

Component: Python Type: bug

apache/arrow#34583 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] `open_dataset()` does not recognise/read csv files when explicit schema provided Open

Component: R Type: bug

apache/arrow#34589 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[FlightRPC] Async API overhaul (tracking issue) Open

Component: FlightRPC

apache/arrow#34607 · 40 comments · 15 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] No limit pushdown for scanning Parquet on Azure Open

Component: Python Type: bug

apache/arrow#34608 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
DOC: to_pylist returns a pandas.Timestamp instead of datetime.datetime when the type is timestamp[ns] Open

Component: Python Type: enhancement

apache/arrow#34614 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] "replace_with_mask" kernel produces invalid result (wrong validity bitmap) when array is a boolean ChunkedArray Open

Component: Python Type: bug

apache/arrow#34634 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Gandiva] Support functions for average, current timestamp, round with rounding modes Open

Component: Gandiva Type: enhancement

apache/arrow#34635 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] ArrowInvalid error when trying to read list of s3 paths in pyarrow.dataset Open

Component: Python Type: bug

apache/arrow#34683 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Dev] PR automation workflow fails to identify committers that have a different alias for ASF and GitHub Open

Component: Developer Tools Type: bug

apache/arrow#34706 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

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