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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2160 open issues indexed

[C++] Enhance arrow::internal::call_traits to support function pointers (and maybe ...?) Open

Component: C++ Type: enhancement

apache/arrow#18652 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] read parquet in pyarrow is not idempotent for time period types Open

Component: Parquet Component: Python Type: bug

apache/arrow#28474 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Compute] Add quotient and modulo kernels Open

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

apache/arrow#28497 · 11 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Generalize thread pool to allow for different queuing strategies / worker loops Open

Component: C++ Type: task

apache/arrow#28608 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Error: template with C linkage template <class T> Open

Component: C++ Type: bug

apache/arrow#28615 · 17 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Implement arrow::Table::GetSizeInBytes() that returns the sum of all Buffer sizes from the internal ArrayData objects Open

Component: C++ Type: bug

apache/arrow#28618 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Create work stealing implementation of generalized ThreadPool Open

Component: C++ Type: task

apache/arrow#28631 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Create new thread pool benchmark demonstrating the "scheduling" bottleneck Open

Component: C++ Type: task

apache/arrow#28632 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Dev] Add a way for people to add information to our saved crossbow data Open

Component: Developer Tools Type: task

apache/arrow#28771 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Add support for locale-specific day of week (and month of year?) returns from timestamp accessor functions Open

Component: R good-first-issue Type: task

apache/arrow#28834 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] combine_chunks fails on column of table, but does not error on table itself Open

Component: Python Type: bug

apache/arrow#28850 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] MapGenerator should optionally forward reentrant pressure Open

Component: C++ Type: bug

apache/arrow#28855 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] arrow_reader_writer_test.cc slow to compile Open

Component: C++ Type: bug

apache/arrow#28908 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] S3 FileSystem doesn't seem to handle redirects Open

Component: C++ Component: Python Type: bug

apache/arrow#28922 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Page statistics not written in v2? Open

Component: C++ Type: bug

apache/arrow#28925 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Bitmap::VisitWordAndWrite epilogue needs to work on Words (not bytes) Open

Component: C++ Type: bug

apache/arrow#28988 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] JSON parsing segment fault on long records (block_size) dependent Open

Component: Python Type: bug

apache/arrow#28990 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Categorical boolean column saved as regular boolean in parquet Open

Component: Parquet Component: Python Type: bug

apache/arrow#29017 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Compute] Add option to return null values for nonexistent and ambiguous times Open

Component: C++ Type: enhancement

apache/arrow#29022 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Gandiva] Implement FIND_IN_SET Hive function on Gandiva Open

Component: Gandiva Type: task

apache/arrow#29045 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Gandiva] Implement XOR function alias on Gandiva Open

Component: Gandiva Type: task

apache/arrow#29047 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Gandiva] Use platform pointer sizes in code generation Open

Component: C++ Component: Gandiva Priority: Critical Type: bug

apache/arrow#29093 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Can't use StreamWriter with ToParquetSchema schema Open

Component: C++ Type: bug

apache/arrow#29105 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Build fails on windows with ARROW_PYTHON=ON Open

Component: Python Type: bug

apache/arrow#29133 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Format] Make requirement around dense union offsets less ambiguous Open

Component: Format Type: task

apache/arrow#18760 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Empty character attributes not stored Open

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

apache/arrow#29233 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] BinaryBuilder doesn't preserve passed in DataType Open

Component: C++ good-first-issue Type: bug

apache/arrow#29309 · 8 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Audit uses of datetime formatting Open

Component: C++ Type: enhancement

apache/arrow#29371 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[R] Add slice() method Open

Component: R Type: task

apache/arrow#29395 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add write support for ORC in the Datasets API Open

Component: C++ Type: task

apache/arrow#29422 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Selective projection of struct fields errors with use_legacy_dataset = False Open

Component: Parquet Component: Python Priority: Critical Type: bug

apache/arrow#29424 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Duplicate functions array_filter/array_take and filter/take Open

Component: C++ Type: bug

apache/arrow#18821 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][C++] Automatically infer/convert uuid.Uuid to an Arrow binary Open

Component: C++ Type: bug

apache/arrow#29541 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] fixed list support missing for binary_join Open

Component: C++ Type: bug

apache/arrow#29554 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] choose kernel missing support for list/struct types Open

Component: C++ Type: bug

apache/arrow#18834 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][C++] index_in_meta_binary/is_in_meta_binary should not show up in functions list Open

Component: C++ Component: Python Type: bug

apache/arrow#29556 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] replace_with_mask support missing for list/fixed_size_list/large_list/struct Open

Component: C++ Type: bug

apache/arrow#29558 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] interval_between(timestamptz, timestamptz) -> struct kernel Open

Component: C++ Type: task

apache/arrow#18858 · 17 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Documentation] No description of Map in-memory layout Open

Component: Documentation Component: Format

apache/arrow#29720 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] File reading regression Open

Component: Python Type: bug

apache/arrow#29772 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Support other interval types Open

Component: Python Status: needs champion Type: enhancement

apache/arrow#29828 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Document and rename is_in_meta_binary Open

Component: C++ good-first-issue Type: bug

apache/arrow#29839 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[R] Support inequality joins Open

Component: R Priority: Critical Status: needs champion Type: enhancement

apache/arrow#29841 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Cannot convert pd.DataFrame with geometry cells to pa.Table Open

Component: Python Type: bug

apache/arrow#29844 · 3 comments · 6 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Parquet] Allow to select columns of a list field without requiring the list component names Open

Component: Python Type: enhancement

apache/arrow#29862 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Selecting colums while reading Parquet file with nested types can give wrong column Open

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

apache/arrow#18882 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Do not duplicate Schema metadata in Parquet schema metadata and serialized ARROW:schema value Open

Component: C++ Type: bug

apache/arrow#29877 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Rewrite pyarrow.jvm using the C data interface Open

Component: Python

apache/arrow#44860 · 16 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][R] Inconsistent application of type in Datasets via the schema Open

Component: C++ Component: R Priority: Critical Status: needs champion Type: bug

apache/arrow#29896 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Create DataHolder that can be used for caching during exec plans Open

Component: C++ Type: task

apache/arrow#29901 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

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