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 13h
Merged PRs (30d): 88

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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2161 open issues indexed

[Format] Add metadata for single and double precision complex numbers Open

Component: Format Type: enhancement

apache/arrow#16264 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Add documentation section for integrations with PyTorch, TensorFlow Open

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

apache/arrow#18052 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Implement pa.array() with type=union type Open

Component: Python Type: enhancement

apache/arrow#19157 · 10 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++] Right-justify array values in PrettyPrint Open

Component: C++ Type: task

apache/arrow#19256 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Packaging] Add a log subcommand to crossbow to get the build logs of tasks Open

Component: Packaging Type: task

apache/arrow#19300 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Gandiva] Use non-platform specific integer types for lengths, indexes Open

Component: C++ Component: Gandiva Type: enhancement

apache/arrow#15810 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Support \0 characters in binary Parquet predicate values Open

Component: Python Type: enhancement

apache/arrow#15818 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++/Python] ORC adapter should fail gracefully if /etc/timezone is missing instead of aborting Open

Component: C++ Component: Python Type: bug

apache/arrow#15921 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Support equality comparison between COO and CSX sparse tensors in SparseTensorEquals Open

Component: C++ Type: enhancement

apache/arrow#20802 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Gandiva] Generate object ids for modules Open

Component: Gandiva Type: task

apache/arrow#20938 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Gandiva] Add overflow checks for decimals Open

Component: Gandiva Type: bug

apache/arrow#21116 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Doc] Integrate benchmarking docs into Sphinx docs Open

Component: Benchmarking Component: Documentation Type: task

apache/arrow#21239 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[GLib] Add support for arrow::DictionaryBuilder Open

Component: GLib Status: needs champion Type: enhancement

apache/arrow#21428 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] orc::TimezoneError Can't open /usr/share/zoneinfo/GMT-00:00 Open

Component: C++ Type: bug

apache/arrow#21471 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Doc][C++] Add examples on how to construct with ArrayData::Make instead of builder classes Open

Component: C++ Component: Documentation Type: enhancement

apache/arrow#21499 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] read_row_group fails with Nested data conversions not implemented for chunked array outputs Open

Component: C++ Component: Python Type: bug

apache/arrow#21526 · 5 comments · 3 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Implement direct support for shared memory arrow columns Open

Component: C++ Type: enhancement

apache/arrow#21559 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python/C++] Empty column selection no longer restores index Open

Component: C++ Component: Python Type: bug

apache/arrow#21621 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] [Gandiva] JIT code executed over uninitialized values Open

Component: Gandiva Type: bug

apache/arrow#21742 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Support inferring nested ndarray with ndim > 1 Open

Component: Python Type: enhancement

apache/arrow#22081 · 10 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] Store sequences of arbitrary ndarrays (with same type) in Tensor value type Open

Component: Python Type: enhancement

apache/arrow#22239 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Doc] Better document the Tensor classes in the prose documentation Open

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

apache/arrow#22275 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Support optional arrow components via extras_require Open

Component: Python Type: enhancement

apache/arrow#22300 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Support ExtensionType arrays in more kernels Open

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

apache/arrow#22304 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] [Documentation] add discussion of Union.typeIds to Layout.rst Open

Component: C++ Component: Documentation Status: needs champion Type: bug

apache/arrow#22342 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Array equals returns incorrectly if NaNs are in arrays Open

Component: Python Priority: Critical Status: needs champion Type: bug

apache/arrow#22446 · 15 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Datatypes not preserved for partition fields in roundtrip to partitioned parquet dataset Open

Component: Python Type: bug

apache/arrow#22510 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] ExtensionType subclass for "unknown" types? Open

Component: C++ Type: enhancement

apache/arrow#22572 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Parquet] Add examples of using HDFS filesystem and Parquet files together Open

Component: Python Type: enhancement

apache/arrow#22625 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] consistently handle conversion of all-NaN arrays across types Open

Component: Python Priority: Major Status: needs champion Type: bug

apache/arrow#22909 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Deprecated BIT_PACKED level decoding is probably incorrect Open

Component: C++ Component: Parquet Priority: Major Type: bug

apache/arrow#42368 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Use software __builtin_popcountll when building without SSE4.2 Open

Component: C++ Type: enhancement

apache/arrow#23013 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add Result<T> to APIs to Gandiva Open

Component: C++ Type: task

apache/arrow#23529 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add Result<T> to APIs to arrow/adapters Open

Component: C++ Type: task

apache/arrow#23533 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Gandiva] Implement Boyer-Moore string search algorithm for functions doing string matching Open

Component: Gandiva Type: task

apache/arrow#23567 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add value accessor in sparse tensor class Open

Component: C++ Type: enhancement

apache/arrow#23585 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] High memory usage writing pyarrow.Table with large strings to parquet Open

Component: Python Type: task

apache/arrow#23592 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] ParquetDataset deadlock with different metadata_nthreads values Open

Component: Python Type: bug

apache/arrow#23661 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Support creating SparseCSRMatrix and SparseCSCMatrix from 0d and 1d Tensors Open

Component: C++ Type: enhancement

apache/arrow#23693 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[GLib] Introduce value-returning garrow::check Open

Component: GLib Type: enhancement

apache/arrow#23769 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Gandiva] Handle utf8 characters for castVARCHAR(string, int) function Open

Component: Gandiva Type: task

apache/arrow#23792 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Gandiva] Calling castVarchar from java sometimes results in segmentation fault for input length 0 Open

Component: C++ Component: Gandiva Type: bug

apache/arrow#23845 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Format][C++] Add tensor and sparse tensor supports in File metadata Open

Component: C++ Component: Format Type: enhancement

apache/arrow#23941 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] saving a dataframe to the same partitioned location silently doubles the data Open

Component: Python Type: bug

apache/arrow#23949 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] ArrowIOError: Invalid Parquet file size is 0 bytes on reading from S3 Open

Component: C++ Component: Python Priority: Major Status: needs champion Type: bug

apache/arrow#24093 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Crossbow] Eliminate libgit2 dependency Open

Component: Developer Tools Status: needs champion Type: enhancement

apache/arrow#24294 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] TestInt96ParquetIO failure on Windows Open

Component: C++ Component: Parquet Priority: Major Type: bug

apache/arrow#42939 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Provide a default implementation for ExtensionType::ExtensionEquals Open

Component: C++ Type: enhancement

apache/arrow#24348 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Gandiva] Consolidate the data generation code for benchmark tests in gandiva into arrow/testing Open

Component: C++ Type: task

apache/arrow#24364 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Setup type checking with mypy Open

Component: Continuous Integration Component: Python Type: enhancement

apache/arrow#24376 · 6 comments · 12 reactions · 0 assignees · Indexed Sep 14, 2026

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