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 18, 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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2,130 open issues indexed

[C++] 'arrow::Compression::type' naming conflicts occur easily Open

Component: C++ Type: enhancement

apache/arrow#34556 · 1 comment · 1 assignee · Opened Mar 14, 2023
[Python] Best practice for adding a column for `__filename` without adding a duplicate field? Open

Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34554 · 8 comments · 3 reactions · Opened Mar 14, 2023
[Docs][FlightRPC] Document Flight error status mappings Open

Component: Documentation Component: FlightRPC Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow#34544 · 4 comments · 1 reaction · Opened Mar 13, 2023
[C++] GcsFileSystem either can't list a particular bucket or hangs indefinitely when doing so Open

Component: C++ Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34525 · Opened Mar 10, 2023
[Python] Add pyarrow.TableGroupBy() subtables Open

Component: Python Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow#34491 · 2 comments · Opened Mar 7, 2023
[Format][FlightRPC] Transfer FlightData in pieces Open

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

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow#34485 · 2 comments · Opened Mar 7, 2023
[C++] Split arrow::FileReader::ReadRowGroups() to 2 methods for flexible async IO Open

Component: C++ Type: enhancement

apache/arrow#34460 · 4 comments · 1 assignee · Opened Mar 5, 2023
[C++][Python] A metadata standard for sorted datasets. Open

Component: C++ Component: Python Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

apache/arrow#34451 · 8 comments · Opened Mar 4, 2023
[Python]: Possible to evaluate `pyarrow.compute.Expression` without filter? Open

Component: Python Type: usage

Difficulty 5/5 Over a week Newbie friendliness 30/100

apache/arrow#34433 · 4 comments · 1 reaction · Opened Mar 3, 2023
[Python] Converting python array to TimestampArray with naive datetime and datetime with various timezones Open

Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34412 · Opened Mar 2, 2023
[R] Named lists cannot be serialized to a map column Open

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

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34409 · 3 comments · Opened Mar 2, 2023
[C++][Flight] Unable to receive error status from DoPut Open

Component: C++ Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34402 · Opened Mar 1, 2023
[Dev] Some assignments from the PR bot fail due to anti-spam protection Open

Component: Developer Tools Type: bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow#34389 · Opened Mar 1, 2023
[C++] Options for handling non-decomposable aggregate functions Open

Component: C++ Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow#34387 · 3 comments · Opened Feb 28, 2023
[C++] Arrow version 5 or later fails to compile/link with gcc version 7 (or earlier) Open

Component: C++ Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34341 · 9 comments · Opened Feb 24, 2023
[R] v11.0.0.2 extremely slow with parquet files written in v9.0.0 Open

Component: R Priority: Critical Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

apache/arrow#34319 · 11 comments · 1 reaction · Opened Feb 23, 2023
[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 · 1 assignee · Opened Feb 23, 2023
[Python] SIGABRT: terminate called without an active exception (core dumped) Open

Component: Parquet Component: Python Type: bug

Difficulty 5/5 Over a week Newbie friendliness 20/100

apache/arrow#34314 · 1 comment · Opened Feb 23, 2023
[Python] pyarrow does not disable SIMD CPU optimizations when set to do so. Open

Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/arrow#34277 · 26 comments · Opened Feb 21, 2023
[C++][Python] Pass extra kwargs to S3 Pyarrow Filesystem Open

Component: Python Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow#34253 · 4 comments · 1 reaction · Opened Feb 18, 2023
[Python] Schema inference reorders fields in nested structs Open

Component: Python Type: bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/arrow#34250 · 2 comments · 2 reactions · Opened Feb 18, 2023
[Python] Conversion of pyArrow table to pandas fails with error: ArrowException: Unknown error: Wrapping Q� failed Open

Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34239 · 4 comments · Opened Feb 17, 2023
[C++] Avoid producing run-end encoded arrays with runs that have a length longer than INT_MAX Open

Component: C++ Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

apache/arrow#34237 · 3 comments · Opened Feb 17, 2023
[FlightRPC][C++] Support implementing simple endpoints with async API Open

Component: C++ Component: FlightRPC Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow#34221 · 5 comments · 1 reaction · Opened Feb 16, 2023
[Python] Extract partition list from pyarrow.dataset.ParquetFileFragment object Open

Component: Python Type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

apache/arrow#34212 · 4 comments · Opened Feb 15, 2023
[Python] Skip PyArrow tests when a testing component is not installed Open

Component: Python Type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/arrow#34183 · 1 comment · 1 reaction · Opened Feb 14, 2023
[Python] Expose more metadata in pyarrow.parquet.ParquetFile.metadata Open

Component: Python Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34180 · 6 comments · Opened Feb 14, 2023
Finish basic Run-End Encoded arrays support in C++ Open

Component: C++ Type: enhancement

apache/arrow#34176 · 2 comments · 1 assignee · Opened Feb 13, 2023
[C++][Python] Allow pyarrow.compute.mode to include null count Open

Component: C++ Component: Python Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 42/100

apache/arrow#34173 · 9 comments · Opened Feb 13, 2023
[Python] `is_null(nan_is_null=True)` does not work with only NaN's Open

Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34162 · 3 comments · Opened Feb 13, 2023
[C++][Python] Binary search for sorted tables. Open

Component: C++ Component: Python Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

apache/arrow#34153 · 4 comments · 1 reaction · Opened Feb 12, 2023
[Python] Specifying schema does not prevent arrow from reading metadata on every single parquet? Open

Component: Parquet Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34145 · 3 comments · Opened Feb 11, 2023
[C++][Parquet] Ignore corrupted or invalid statistics Open

Component: C++ Component: Parquet Type: bug

apache/arrow#34139 · 5 comments · 1 assignee · Opened Feb 11, 2023
[Dev][C++] Don't use GitHub archive files with checksums Open

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

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34130 · Opened Feb 10, 2023
[C++] Allow converting strings to dates without using datetimes as an intermediate step Open

Component: C++ Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

apache/arrow#34121 · 4 comments · Opened Feb 10, 2023
[C++][Gandiva] Extend cast operators for int8 Open

Component: Gandiva Type: enhancement

apache/arrow#34117 · 1 comment · 1 assignee · Opened Feb 10, 2023
[Python][C++] Support CSV compression in write_dataset Open

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

Difficulty 4/5 3-5 days Newbie friendliness 42/100

apache/arrow#34085 · 3 comments · Opened Feb 8, 2023
[C++] Expose Arrow's plan execution helpers (Finishes, ResultWith) Open

Component: C++ Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34083 · 4 comments · Opened Feb 8, 2023
[C++] strptime fails to parse with %z on MacOS when zone offset includes ":" Open

Component: C++ Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow#34081 · 4 comments · Opened Feb 8, 2023
[C++][Gandiva] Provide common transcendental / bitwise operations Open

Component: Gandiva Type: enhancement

apache/arrow#34068 · 2 comments · 1 reaction · 1 assignee · Opened Feb 7, 2023
[C++][Python] pyarrow.dataset.write_dataset does not store fields metadata Open

Component: C++ Component: Python good-second-issue Type: usage

Difficulty 3/5 1-2 days Newbie friendliness 48/100

apache/arrow#34067 · 5 comments · Opened Feb 7, 2023
[R] Using props$set_coerce_int96_timestamp_unit in open_dataset() Open

Component: R Type: usage

Difficulty 4/5 3-5 days Newbie friendliness 38/100

apache/arrow#34062 · 6 comments · Opened Feb 7, 2023
[C++] rvalue lhs cannot be moved into returned value in Status::operator& Open

Component: C++ Type: enhancement

apache/arrow#34001 · 1 comment · 1 assignee · Opened Feb 2, 2023
[Python] Custom Python type/array subclasses for ExtensionTypes implemented in C++ Open

Component: Python Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow#33997 · 6 comments · Opened Feb 2, 2023
[R] Handle "unmatched" argument in joins Open

Component: R Type: enhancement

Difficulty 3/5 1-2 days Newbie friendliness 42/100

apache/arrow#33988 · 4 comments · Opened Feb 1, 2023
[Python][Rust] Create extension point in python for Dataset/Scanner Open

Component: Python Type: enhancement

apache/arrow#33986 · 34 comments · 2 reactions · 1 assignee · Opened Feb 1, 2023
[Python] Add low-level pyarrow bindings for Acero Open

Component: Python Type: enhancement

apache/arrow#33976 · 1 comment · 5 reactions · 1 assignee · Opened Feb 1, 2023
[C++] Support Temporal Extraction Functions for duration types Open

Component: C++ Component: Python good-second-issue Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

apache/arrow#33962 · 12 comments · Opened Jan 31, 2023
[R] Map `cov()` and `cor()` to new covariance kernel Open

Component: R Type: enhancement

apache/arrow#33959 · 2 comments · 1 assignee · Opened Jan 31, 2023
[C++] Support FnOnce in ThreadPool::Submit Open

Component: C++ Type: enhancement

apache/arrow#33944 · 1 comment · 1 assignee · Opened Jan 31, 2023

apache/arrow

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