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 23h
Merged PRs (30d): 101

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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2142 open issues indexed

[R] Parquet files of indexed data.table objects error in read_parquet Open

Component: Parquet Component: R Type: bug

apache/arrow#43742 · 4 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] lz4-hadoop doesn't support block compression Open

Component: C++ Type: bug

apache/arrow#43745 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Unable to install Arrow 17.0.0 with GCS enabled via conan 2.6.0 Open

Component: Packaging Type: bug

apache/arrow#43773 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
pandas_udf causing Python worker to crash in PySpark on macOS with M3 pro chip Open

Component: Python Type: bug

apache/arrow#43774 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][FlightRPC] When using FlightDataStream yielding Tables means that IPCWriteOptions is not respected. Open

Component: FlightRPC Component: Python Type: bug

apache/arrow#43779 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Incorrect importing of buffer protocol objects Open

Component: Python Type: bug

apache/arrow#43792 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] `test_cpp_extension_in_python` started failing on osx in conda-forge Open

Component: Packaging Component: Python Type: bug

apache/arrow#43800 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[CI][Python][C++] Support on Power Architecture Open

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

apache/arrow#43817 · 36 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] PyCapsule interface for Image/Raster Data Open

Component: Python Type: usage

apache/arrow#43831 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Integration] Test executable does not validate embedded streams Open

Component: C++ Component: Integration Type: bug

apache/arrow#43833 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python][C++] Casting a list of struct array with null field results in invalid result Open

Component: C++ Component: Python Type: bug

apache/arrow#43838 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Docs] Use editable pip install invocation in the development docs for PyArrow Open

Component: Documentation Component: Python

apache/arrow#43845 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] drop_null kernel ignores nulls when values is an union or a REE array Open

Component: C++ Type: bug

apache/arrow#43851 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Add more pyarrow.type_for_alias(es) to support binary, decimals, etc. Open

Component: C++ Component: Python Type: enhancement

apache/arrow#43858 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++][FlightRPC] CI failing on macOS builds: reference to 'bp::child' is ambiguous Open

Component: C++ Component: FlightRPC Type: bug

apache/arrow#43865 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] BUG: Process hangs indefinitely on UnicodeDecodeError When use_threads=True in pyarrow.csv.read_csv Open

Type: bug

apache/arrow#43892 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Getting a 'pyarrow.lib.ArrowTypeError' error following a schema merge on delta table with nested columns Open

Component: Parquet Component: Python Type: bug

apache/arrow#43893 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Compute: KeyEncoder support List Type Open

Component: C++ Type: enhancement

apache/arrow#43911 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] `pyarrow.Table` equality comparison behavior is unexpected Open

Component: Python Type: bug

apache/arrow#43985 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Cross-compiling Apache Arrow & Parquet on WSL for ARM64 - free() invalid pointer Issue in libparquet and libarrow Open

Component: C++ Type: bug

apache/arrow#44004 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Pyarrow conversion from and to pandas fails for categorical variables with large dictionaries Open

Component: Python Type: bug

apache/arrow#44048 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] TableBatchReader does not propagate device_type to record batches Open

Component: C++ Type: bug

apache/arrow#44049 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Error message regarding invalid values (i.e Rescaling Decimal128 value would cause data loss) does not show the offending values Open

Component: Python Type: bug

apache/arrow#44061 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Move pandas compatibility and conversion code to the pandas project? Open

Component: Python

apache/arrow#44068 · 2 comments · 4 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Deprecate column scanner? Open

Component: C++ Component: Parquet Type: enhancement

apache/arrow#44075 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Reading parquet files with timestamp column containing 9999-12-23 23:59:59 yields 1816-03-22 05:56:07.066277376 Open

Component: Python Type: bug

apache/arrow#44112 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Arrow doesn't pickup `endpoint_url` from `~/.aws/config` Open

Component: Parquet Component: Python Type: bug

apache/arrow#44119 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Arrow IPC 30x slower than Numpy's, and MemoryMappedFile is slower than OSFile Open

Component: Python Type: bug

apache/arrow#44121 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Memory leak when using engine="pyarrow" while reading csv files via pd.read_csv() Open

Component: Other Component: Python Type: bug

apache/arrow#44147 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] [FlightRPC] Index with value of 0 is out-of-bounds for array of length 0 Open

Component: FlightRPC Component: Python Type: bug

apache/arrow#44160 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python][C++] Offset Overflow when calling combine_chunks on Large Struct Arrays Open

Component: C++ Component: Python Type: bug

apache/arrow#44164 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Acero] Provide method to perform aggregations with acero for datasets Open

Component: Python Type: enhancement

apache/arrow#44168 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[R] Support integer date and time classes from data.table Open

Component: R Status: needs champion Type: enhancement

apache/arrow#44174 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Cannot use sparse_union/dense_union types with pa.Table.from_pylist() Open

Component: Python Type: bug

apache/arrow#44182 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Allow PyCapsule Interface in `pyarrow.scalar` constructor? Open

Component: Python Status: needs champion Type: enhancement

apache/arrow#44232 · 4 comments · 1 reaction · 1 assignee · Indexed Sep 14, 2026
[C++][Decimal] Should we use "0E0" not "0E+1" with "0" and scale=-1? Open

Component: C++ Type: enhancement

apache/arrow#44285 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Parquet] Memory Leak when writing Open

Component: Parquet Component: Python Type: bug

apache/arrow#44295 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[Python] cast does not allow structs to be renamed Open

Component: Python Type: bug

apache/arrow#44296 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] please write unregister_scalar_function and/or make registration local/temporary Open

Component: R Status: needs champion Type: enhancement

apache/arrow#44306 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] cannot mutate into a hive-partition key Open

Component: R Type: bug

apache/arrow#44309 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Failed to compile ARM64 PyArrow for Windows ARM Open

Component: C++ Component: Python Type: bug

apache/arrow#44310 · 14 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] pyarrow.Table.take() is much slower when reading a parquet with read_table instead of from_batches since pyarrow 8.0.0 Open

Component: Python Type: bug

apache/arrow#44317 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Binary View Compute Kernels Open

Component: C++ Status: needs champion Type: enhancement

apache/arrow#44336 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
`pa.Table.to_pandas(strings_to_categorical=True)` failing for large string/binary arrays Open

Component: Python Type: bug

apache/arrow#44340 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[GLib] Add a sub `Buffer` class for `GBytes` based buffer Open

Component: GLib Status: needs champion Type: enhancement

apache/arrow#44349 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Saving/loading dictionary type using pyarrow is broken Open

Component: Parquet Type: bug

apache/arrow#44350 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Strange decimal cast when allow_decimal_truncate=True Open

Component: Python Type: bug

apache/arrow#44356 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[CI][C++] Add clang-cl job Open

Component: C++ Status: needs champion Type: enhancement

apache/arrow#44378 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Support union arrays in `concat_tables` Open

Component: Python Type: enhancement

apache/arrow#44397 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Timestamp - out of bounds for nanoseconds Open

Component: Python Type: bug

apache/arrow#44420 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026

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