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 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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2154 open issues indexed

[R] "open_dataset(f) %>% filter(id %in% myvec) %>% collect" causes CPP11::unwind_execption, crashed R Open

Type: bug

apache/arrow#33487 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
MIGRATION: Handle Jira auto-numbered ordered list syntax Open

apache/arrow#14628 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[pyarrow] Regarding performance issue of filter operation Open

apache/arrow#14629 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
`binary_replace_slice` should not work with `string` types Open

Component: C++ Type: bug

apache/arrow#33490 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Remove legacy scanner code where possible Open

Component: C++ Type: enhancement

apache/arrow#33498 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
MIGRATION: Handle issues exceeding size limits Open

apache/arrow#14648 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Better document the CSV read/parse/convert options we can use with open_dataset() Open

Component: R Type: task

apache/arrow#33522 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Go] What is the best way to handle dictionary overflow? Open

apache/arrow#14670 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Optimize DELTA_BINARY_PACKED encoding and decoding Open

Component: C++ Component: Parquet Type: enhancement

apache/arrow#20505 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Expose grouping segment keys to PyArrow Open

Component: Python Type: enhancement

apache/arrow#33535 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Parquet REL decoding w/IAA(Intel® In-Memory Analytics Accelerator) Open

apache/arrow#14684 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] `ds.write_dataset` doesn't allow feather compression Open

Component: Python Type: bug

apache/arrow#33537 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++] Expose Arrow's *FromJson, Assertion and Random generator helper functions Open

Component: C++ Type: enhancement

apache/arrow#33538 · 15 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] OSError: Unable to load libjvm: /usr/java/latest//lib/amd64/server/libjvm.so Open

apache/arrow#14686 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[python] connect hdfs,got ClassNotFoundException Open

apache/arrow#14694 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
CompressedOutputStream can't correctly compress/write files bigger than 16 GB Open

Component: Python Type: bug

apache/arrow#14699 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add support for filename, file index, and batch index columns to exec plan based scanner Open

Component: C++ Type: task

apache/arrow#20509 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Create many-column scanner microbenchmarks Open

Component: C++ Type: task

apache/arrow#33551 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Decide on duplicate column handling in scanner, add more tests Open

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

apache/arrow#33552 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Sporadic error in StressSourceGroupedSumStop Open

Component: C++ Type: bug

apache/arrow#33562 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] [Docs] Mention the C Data/Stream Interface in PyArrow Extending Open

Component: Documentation Type: task

apache/arrow#33567 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Filter operations not shown when called before summarise Open

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

apache/arrow#14732 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Deprecated filter + across usage Open

Component: R

apache/arrow#14734 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] "struct_field" kernel crashing when selecting a Union field and parent StructArray has a validity bitmap Open

Component: C++ good-second-issue

apache/arrow#14736 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] Mismatching schema when writing dataset Open

Component: Python Type: usage

apache/arrow#14763 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Fix PytestUnraisableExceptionWarning in substrait test Open

Component: Python Type: bug

apache/arrow#14766 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] CSVBufferIterator potentially used incorrectly Open

Component: C++ Type: bug

apache/arrow#14792 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Arrow Flight Stream Writing vector Schema Root from Batches Open

Component: FlightRPC Type: usage

apache/arrow#14812 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] write_dataset how to add and update data Open

Component: Parquet Component: Python Type: usage

apache/arrow#14834 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[Python] Is there a way to call a custom compute function on a table.group_by aggregation? Open

Component: Python Type: usage

apache/arrow#14860 · 3 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Add a pyarrow.Table.aggregate function to compute aggregates against the whole table Open

Component: Python Type: enhancement

apache/arrow#14896 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Add pyarrow.TableGroupBy.groups method Open

Component: Python Type: enhancement

apache/arrow#14898 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Acero's Execution Plan never finishes. Open

Component: C++ Type: bug

apache/arrow#33593 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++][CMake] Use cpp/src/arrow/util/config.h.cmake instead of add_defintions() for ARROW_WITH_${COMPRESESION} Open

Component: C++ Type: enhancement

apache/arrow#14906 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++][Python] Unifying differing dictionaries in Arrow compute Open

Component: Python Type: bug

apache/arrow#14955 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++] Enable Substrait ReadRel Projection in Acero Open

Component: C++ Type: enhancement

apache/arrow#14965 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Change StructArray.field(..) to return "flattened" field? Open

Component: Python

apache/arrow#14970 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Rename "struct_field" kernel, or add new kernel for generic FieldRef selection in projections? Open

Component: C++

apache/arrow#14971 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Dev] Comment bot embeds closes comment on code block Open

Component: Developer Tools Status: needs champion Type: bug

apache/arrow#14979 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] test_get_include failing in conda builds on unix Open

Component: Continuous Integration Component: Python Priority: Medium Status: needs champion Type: bug

apache/arrow#15016 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] date64[ms] comes back as date32[day] after roundtrip to Parquet Open

Component: Parquet Component: Python Type: bug

apache/arrow#15032 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] feather round-trip support for named vectors in list columns Open

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

apache/arrow#15033 · 5 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[c++][parquet][8.0.0] The coredump appears when constructed parquetfileReader Open

Component: C++ Type: bug

apache/arrow#15044 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Drop pytz for timezone support (default to use datetime.timezone / zoneinfo) Open

Component: Python

apache/arrow#15047 · 9 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++][Python] IPC serialization roundtrip of extension type with storage type pa.null() reconstructs invalid buffers Open

Component: C++ Component: Python Type: bug

apache/arrow#15068 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Weighted stat aggregations in arrow-compute Open

Component: C++ Component: Python Component: R Type: enhancement

apache/arrow#15103 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add an option for the order by node to be stable Open

Component: C++ Type: enhancement

apache/arrow#15144 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Parquet][C++] More elaborate dictionary fallback for Parquet 2.0 Open

Component: C++ Component: Parquet Type: enhancement

apache/arrow#15165 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[CI] Create suggestions comments in lint job Open

Component: Continuous Integration Type: enhancement

apache/arrow#15215 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Speed up Parquet Writing? Open

Component: C++ Component: Parquet Type: enhancement

apache/arrow#15220 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

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