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

[Python][Flight] Unexpected type for flight.FlightCallOptions kwargs "headers" Open

Component: Python Type: bug

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

apache/arrow#35288 · 1 reaction · Opened Apr 23, 2023
[C++] OrderBy with spillover Open

Component: C++ Type: enhancement

apache/arrow#35268 · 19 comments · 4 reactions · 1 assignee · Opened Apr 21, 2023
[Python] Pyarrow table conversion from pandas fails for categorical fields with arrow dtypes Open

Component: Python Type: enhancement

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

apache/arrow#35259 · 3 comments · Opened Apr 20, 2023
[Python] RuntimeError when using pyarrow from a thread which is not joined before main exits when pandas is installed Open

Component: Python Type: bug

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

apache/arrow#35237 · 4 comments · Opened Apr 19, 2023
[MATLAB] Consider lowering the minimum CMake version requirement for building the MATLAB interface Open

Component: MATLAB good-first-issue good-second-issue Type: enhancement

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

apache/arrow#35221 · 4 comments · Opened Apr 18, 2023
[CI][C++] Add clang-tidy and IWYU C++ CI jobs Open

Component: C++ Component: Continuous Integration Type: enhancement

apache/arrow#35214 · 1 comment · 1 reaction · 1 assignee · Opened Apr 18, 2023
[C++] Nested RUN_END_ENCODED arrays (a REE of a REE) should be considered invalid Open

Component: C++ Type: bug

Difficulty 3/5 1-2 days Newbie friendliness 38/100

apache/arrow#35208 · Opened Apr 18, 2023
[C++] Don't assume `!MayHaveNulls()` implies no logical nulls for all types Open

Component: C++ Type: bug

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

apache/arrow#35207 · Opened Apr 18, 2023
[Python] Extend csv `invalid_row_handler` with `fill_null` and `ignore_unknown` Open

Component: Python

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

apache/arrow#35198 · 1 comment · Opened Apr 17, 2023
[Python] Flight objects like FlightEndpoint cannot be pickled Open

Component: Python Type: bug

Difficulty 3/5 1-2 days Newbie friendliness 30/100

apache/arrow#35150 · Opened Apr 15, 2023
[C++] Add versions of IsNull/IsValid that take an ArrowType tparam so implementation can be statically dispatched Open

Component: C++ Type: enhancement

apache/arrow#35141 · 2 comments · 1 assignee · Opened Apr 14, 2023
[Python][C++] Slow table slice when the table has many chunks Open

Component: Python Type: bug

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

apache/arrow#35126 · 4 comments · 2 reactions · Opened Apr 14, 2023
[R] write_parquet expose similar options as python parquet.write_table ? Open

Component: R Type: enhancement

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

apache/arrow#35102 · 2 comments · Opened Apr 13, 2023
[C++] ArrayData support for child_data slice. Open

Component: C++ Type: bug

apache/arrow#35097 · 1 assignee · Opened Apr 13, 2023
[Python] pyarrow.compute.subtract_checked overflowing for some duration arrays constructed from numpy Open

Component: Python Type: bug

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

apache/arrow#35088 · 3 comments · 1 reaction · Opened Apr 12, 2023
[R] pkgdown site improvements Open

Component: R Type: enhancement

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

apache/arrow#35082 · 1 comment · Opened Apr 12, 2023
[Python] Bindings for FixedShapeTensorType.FromTensor/ToTensor and FixedShapeTensorArray.strides Open

Component: Python Status: needs champion Type: enhancement

apache/arrow#35068 · 3 comments · 2 reactions · 1 assignee · Opened Apr 12, 2023
[Python][Docs] Update/rearrange Data Types section and add FixedShapeTensorType Open

Component: Documentation Component: Python Status: needs champion Type: enhancement

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

apache/arrow#35064 · 2 comments · Opened Apr 12, 2023
[C++] Fix handling of logical nulls by compute kernels processing run-end encoded arrays or arrays of unions Open

Component: C++ Type: bug

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

apache/arrow#35058 · 1 comment · Opened Apr 12, 2023
[Python] Creating first `pyarrow.array` is slow. Open

Component: Python Type: bug

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

apache/arrow#34994 · Opened Apr 10, 2023
[Python] `bool(pa.scalar(False))` evaluates to True Open

Component: Python Type: bug

apache/arrow#34987 · 18 comments · 2 reactions · 1 assignee · Opened Apr 8, 2023
[Python] Python extension types aren't usable in struct arrays Open

Component: Python Type: bug

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

apache/arrow#34985 · 2 comments · Opened Apr 8, 2023
Relax pyarrow.compute.is_in type requirement Open

Component: Python Type: enhancement

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

apache/arrow#34982 · 2 comments · Opened Apr 8, 2023
[Python] Allow `pyarrow.compute.cast` to coerce errors to null values Open

Component: Python Type: enhancement

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

apache/arrow#34976 · 3 comments · Opened Apr 7, 2023
[R] Add an argument to `open_csv_dataset()` to repair duplicated column names or ignore them? Open

Component: R Status: needs champion Type: enhancement

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

apache/arrow#34965 · 10 comments · Opened Apr 7, 2023
[C++]: Support tail in FetchNode Open

Component: C++ Type: enhancement

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

apache/arrow#34942 · 1 comment · Opened Apr 6, 2023
[R][Doc] Remove discussion of Scanner from vignettes Open

Component: Documentation Component: R Type: enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

apache/arrow#34940 · 1 comment · 1 reaction · Opened Apr 6, 2023
pyarrow.csv.read_csv() memory not released in jupyterlab Open

Component: Python Type: bug

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

apache/arrow#34934 · Opened Apr 6, 2023
[C++] Better support optional start/stop in "utf8_slice_codeunits" kernel Open

Component: C++ Type: bug

apache/arrow#34929 · 3 comments · 1 assignee · Opened Apr 6, 2023
[C++] utf8_slice_codeunits doesn't support stop/step array type Open

Component: C++ Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 32/100

apache/arrow#34927 · 4 comments · Opened Apr 6, 2023
[Python] unexpected URL encoded path (white spaces) when uploading to S3 Open

Component: Python good-first-issue Status: needs champion Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

apache/arrow#34905 · 11 comments · 1 reaction · Opened Apr 5, 2023
[Python] Provide a way to restore a schema from its string representation Open

Component: Python Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 38/100

apache/arrow#34898 · 7 comments · 2 reactions · Opened Apr 5, 2023
[C++] Mechanism for throttling remote filesystems to avoid rate limiting Open

Component: C++ Type: enhancement

Difficulty 5/5 Over a week Newbie friendliness 28/100

apache/arrow#34892 · 10 comments · 2 reactions · Opened Apr 4, 2023
[C++] Kernel to construct MonthDayNanoInterval array from separate arrays of months/days/nanos Open

Component: C++ good-second-issue

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

apache/arrow#34824 · 1 reaction · Opened Mar 31, 2023
empty table changes datatpye from ns to us Open

Component: Python Type: bug

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

apache/arrow#34782 · Opened Mar 29, 2023
[R] write_* methods can't have socketConnection as a sink Open

Component: R Type: enhancement

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

apache/arrow#34779 · 3 comments · Opened Mar 29, 2023
[Python] Batch much smaller than `batch_size` parameter Open

Component: Parquet Component: Python Type: bug

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

apache/arrow#34758 · 4 comments · Opened Mar 28, 2023
[Python] How to handle chunked arrays output in pyarrow.array(...) Open

Component: Python

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

apache/arrow#34755 · 5 comments · Opened Mar 28, 2023
[CI] Evaluate new GHA backend for sccache Open

Component: Continuous Integration Type: enhancement

apache/arrow#34715 · 2 comments · 1 assignee · Opened Mar 24, 2023
[C++] Utilities to estimate average (de)serialized row size Open

Component: C++ Type: enhancement

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

apache/arrow#34712 · 6 comments · Opened Mar 23, 2023
[Dev] PR automation workflow fails to identify committers that have a different alias for ASF and GitHub Open

Component: Developer Tools Type: bug

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

apache/arrow#34706 · Opened Mar 23, 2023
[Python] ArrowInvalid error when trying to read list of s3 paths in pyarrow.dataset Open

Component: Python Type: bug

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

apache/arrow#34683 · 4 comments · Opened Mar 22, 2023
[C++][Gandiva] Support functions for average, current timestamp, round with rounding modes Open

Component: Gandiva Type: enhancement

apache/arrow#34635 · 3 comments · 1 assignee · Opened Mar 19, 2023
[C++] "replace_with_mask" kernel produces invalid result (wrong validity bitmap) when array is a boolean ChunkedArray Open

Component: Python Type: bug

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

apache/arrow#34634 · 5 comments · Opened Mar 19, 2023
DOC: to_pylist returns a pandas.Timestamp instead of datetime.datetime when the type is timestamp[ns] Open

Component: Python Type: enhancement

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

apache/arrow#34614 · 3 comments · Opened Mar 17, 2023
[Python] No limit pushdown for scanning Parquet on Azure Open

Component: Python Type: bug

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

apache/arrow#34608 · 1 comment · Opened Mar 17, 2023
[FlightRPC] Async API overhaul (tracking issue) Open

Component: FlightRPC

apache/arrow#34607 · 40 comments · 15 reactions · 1 assignee · Opened Mar 17, 2023
[R] `open_dataset()` does not recognise/read csv files when explicit schema provided Open

Component: R Type: bug

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

apache/arrow#34589 · 4 comments · Opened Mar 16, 2023
[Python] Pyarrow DictionaryArray.dictionary_decode mangling strings Open

Component: Python Type: bug

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

apache/arrow#34583 · 4 comments · Opened Mar 16, 2023
[Python] Round-trip type-conversion bug list object in pd.DataFrame Open

Component: Python Type: bug

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

apache/arrow#34574 · 1 comment · Opened Mar 15, 2023

apache/arrow

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