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

Beginner friendly Everything

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2,130 open issues indexed

[C++] Create the first binary aggregate function kernel to serve as an example for other implementations Open

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

apache/arrow#33937 · 3 comments · 4 reactions · 1 assignee · Opened Jan 30, 2023
[C++] Test for alignment issues Open

Component: C++ Type: enhancement

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

apache/arrow#33933 · 8 comments · 1 reaction · Opened Jan 30, 2023
[C++][Python] Filesystem Interface: HadoopFileSystem unable to connect to hdfs - libhdfs not found Open

Component: C++ Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 30/100

apache/arrow#33913 · Opened Jan 29, 2023
[R] The R development documentation nightly fails to load Arrow Open

Component: R Type: bug

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

apache/arrow#33898 · 5 comments · Opened Jan 27, 2023
[Python] support min/max/sum for duration dtypes Open

Component: Python Type: enhancement

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

apache/arrow#33891 · 1 comment · Opened Jan 26, 2023
[Python][C++] Add controls to disable metadata caching in datasets Open

Component: C++ good-second-issue Type: enhancement

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

apache/arrow#33888 · 1 comment · 1 reaction · Opened Jan 26, 2023
[C++] Improve compression strategy in IPC, Parquet Open

Component: C++ Type: enhancement

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

apache/arrow#33885 · 3 comments · Opened Jan 26, 2023
[C++] [Python] Test user-defined tables in an execution plan Open

Component: C++ Component: Python Type: enhancement

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

apache/arrow#33884 · 1 comment · Opened Jan 26, 2023
[Python] Adopt a more pythonic method for UDF registration Open

Component: Python Type: enhancement

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

apache/arrow#33883 · 2 comments · Opened Jan 26, 2023
Add/improve tracing in the dataset writer Open

Component: C++ Type: enhancement

apache/arrow#33880 · 1 comment · 1 assignee · Opened Jan 26, 2023
[C++] [Python] Make a user-defined table from a generator Open

Component: C++ Component: Python Type: enhancement

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

apache/arrow#33879 · 1 comment · Opened Jan 26, 2023
[Dev] Stop commenting "Closes .." on PR, comment on issue instead Open

Component: Developer Tools

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

apache/arrow#33863 · 2 comments · Opened Jan 25, 2023
[C++] GlobFiles based URI doesn't function properly in Windows Open

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

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

apache/arrow#33861 · Opened Jan 25, 2023
HashJoin Operation, need help performing concat of record batches Open

Component: C++ Type: usage

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

apache/arrow#33834 · 2 comments · Opened Jan 23, 2023
[Python] Unable to build pyarrow wheel for macOS 10.13 when installing from PyPI Open

Component: Python installation Type: bug

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

apache/arrow#33826 · 8 comments · 3 reactions · Opened Jan 22, 2023
[C++] Improve error message when reading Streaming file with File reader and vice versa Open

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

apache/arrow#33823 · 12 comments · 1 assignee · Opened Jan 21, 2023
[Dev][Release] Verification script doesn't test amd64 architecture on arm64 mac Open

Component: Developer Tools Component: Release Type: bug

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

apache/arrow#33818 · 2 comments · Opened Jan 21, 2023
[Python] Support for reading .csv files from a zip archive Open

Component: Python Type: enhancement

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

apache/arrow#33790 · 4 comments · Opened Jan 19, 2023
[R] writing/reading a data.frame with column class 'list' changes column class Open

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

Difficulty 4/5 3-5 days Newbie friendliness 30/100

apache/arrow#33784 · 6 comments · Opened Jan 19, 2023
[C++][Benchmark] tpch benchmark fails DCHECK Open

Component: Benchmarking Component: C++ Type: bug

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

apache/arrow#33771 · Opened Jan 18, 2023
[Python] Multiple warnings and asserts triggered in debug CPython 3.11 Open

Component: Python Type: bug

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

apache/arrow#33765 · 9 comments · Opened Jan 18, 2023
[Python][C++] How to limit the memory consumption of to_batches() Open

Component: Python Type: usage

Difficulty 4/5 3-5 days Newbie friendliness 30/100

apache/arrow#33759 · 16 comments · Opened Jan 18, 2023
[C++][Doc] Update "struct_field" kernel documentation about passing field names in addition to indices Open

Component: C++ Component: Documentation good-first-issue

apache/arrow#33745 · 4 comments · 1 assignee · Opened Jan 18, 2023
[Packaging] Amazon Linux 2 RPMs - openssl-devel cannot coexist with openssl11-devel and breaks installing arrow-devel Open

Component: Packaging Type: bug

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

apache/arrow#33733 · 5 comments · Opened Jan 18, 2023
[Python] Support Python enums in pyarrow Open

Component: Python Type: bug

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

apache/arrow#33729 · 2 comments · 1 reaction · Opened Jan 17, 2023
[C++][Parquet] Add WriteRecordBatchAsync to parquet writer Open

Component: C++ Component: Parquet Type: enhancement

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

apache/arrow#33710 · 3 comments · Opened Jan 17, 2023
[Python] Creating dataset with an S3 Path using fsspec filesystem does not work Open

Component: Python Type: bug

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

apache/arrow#33707 · Opened Jan 16, 2023
[Python] Reading flat dataset with `partitioning="hive"` results in partition schema equal to dataset schema Open

Component: Python Priority: Critical Type: bug

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

apache/arrow#33668 · 4 comments · Opened Jan 15, 2023
[C++][Python] Support parsing a StringArray full of JSON to a Table Open

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

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

apache/arrow#33662 · 3 comments · Opened Jan 13, 2023
[C++] Fix documentation on Newly Added Methods on ExecPlan Open

Component: C++ Type: bug

Difficulty 1/5 Under an hour Newbie friendliness 55/100

apache/arrow#33649 · 2 comments · Opened Jan 13, 2023
[Python][Doc] Enable remainder of discussed numpydoc checks Open

Component: Documentation Component: Python Type: enhancement

apache/arrow#33646 · 4 comments · 1 assignee · Opened Jan 13, 2023
[Python] type_for_alias support timestamp[unit, tz] Open

Component: Python Type: enhancement

Difficulty 4/5 3-5 days Newbie friendliness 30/100

apache/arrow#33642 · 2 comments · Opened Jan 12, 2023
[C++] Flag const_cast usage when linting Open

Component: Archery Component: C++ Type: enhancement

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

apache/arrow#33629 · 3 comments · 2 reactions · Opened Jan 12, 2023
[C++] Review and sanitize const_cast usage Open

Component: C++ good-second-issue Type: enhancement

apache/arrow#33628 · 13 comments · 1 assignee · Opened Jan 12, 2023
[C++][HDFS] Can't get performance improve when increase the thread number of IO thread pool Open

Component: C++ Type: enhancement

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

apache/arrow#33627 · 7 comments · Opened Jan 12, 2023
[GCS] Scanning hive-partitioned dataset results in orders of magnitude more network traffic than it should Open

Component: Python Type: bug

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

apache/arrow#33624 · 1 comment · 4 reactions · Opened Jan 12, 2023
[C++] Improve arrow::fs::FileSelect performance for `IsFile()` and `IsDirectory()` Open

Component: C++ Type: enhancement

apache/arrow#33618 · 12 comments · 1 assignee · Opened Jan 11, 2023
[C++] Support batch size in user-defined tabular functions Open

Component: C++ Type: enhancement

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

apache/arrow#33612 · 1 comment · Opened Jan 11, 2023
[GLib][Dataset] Add GADatasetFilenamePartitioning Open

Component: GLib Type: enhancement

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

apache/arrow#15258 · 1 comment · Opened Jan 8, 2023
[R] R to Arrow to R roundtrip adds a `ptype` column attribute to list columns Open

Component: R Priority: Medium Type: bug

apache/arrow#15248 · 1 assignee · Opened Jan 7, 2023
[C++][Parquet] Speed up Parquet Writing? Open

Component: C++ Component: Parquet Type: enhancement

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

apache/arrow#15220 · 10 comments · Opened Jan 6, 2023
[CI] Create suggestions comments in lint job Open

Component: Continuous Integration Type: enhancement

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

apache/arrow#15215 · 1 comment · Opened Jan 6, 2023
[Parquet][C++] More elaborate dictionary fallback for Parquet 2.0 Open

Component: C++ Component: Parquet Type: enhancement

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

apache/arrow#15165 · 5 comments · Opened Jan 3, 2023
[C++] Add an option for the order by node to be stable Open

Component: C++ Type: enhancement

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

apache/arrow#15144 · 1 comment · Opened Jan 1, 2023
[C++] Weighted stat aggregations in arrow-compute Open

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

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

apache/arrow#15103 · 8 comments · Opened Dec 28, 2022
[C++][Python] IPC serialization roundtrip of extension type with storage type pa.null() reconstructs invalid buffers Open

Component: C++ Component: Python Type: bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

apache/arrow#15068 · 2 comments · Opened Dec 22, 2022
[Python] Drop pytz for timezone support (default to use datetime.timezone / zoneinfo) Open

Component: Python

apache/arrow#15047 · 9 comments · 1 assignee · Opened Dec 20, 2022
[c++][parquet][8.0.0] The coredump appears when constructed parquetfileReader Open

Component: C++ Type: bug

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

apache/arrow#15044 · Opened Dec 20, 2022
[R] feather round-trip support for named vectors in list columns Open

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

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

apache/arrow#15033 · 5 comments · 2 reactions · Opened Dec 19, 2022
[C++] date64[ms] comes back as date32[day] after roundtrip to Parquet Open

Component: Parquet Component: Python Type: bug

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

apache/arrow#15032 · 1 comment · Opened Dec 19, 2022

apache/arrow

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