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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2147 open issues indexed

[Python] cast doesn't work for structure in pyarrow Open

Component: Python Type: bug

apache/arrow#35408 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[GLib] Add GArrowFixedShapeTensorArray Open

Component: GLib Type: enhancement

apache/arrow#35420 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] pyarrow.concat_tables raises error about different Schema if columns have different order Open

Component: C++ Component: Python Type: usage

apache/arrow#35424 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
How to define that a field can be null Open

Component: Parquet Component: Python Type: usage

apache/arrow#35441 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] to_pandas fails if a record batch's length is smaller than the length of its arrays Open

Component: Python Type: bug

apache/arrow#35452 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] can we use simdjson to replace rapidjson Open

Component: C++ Type: enhancement

apache/arrow#35460 · 25 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
"NumericArray" and its instantiations are not exported and causes issue on Android when `-fvisibility=hidden` is used Open

Component: C++ Type: bug

apache/arrow#35465 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Refactor debug-logging facilities in `AsofJoinNode` Open

Component: C++ Type: enhancement

apache/arrow#35507 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Adding data to tdigest in pyarrow Open

Component: C++ Component: Python Type: enhancement

apache/arrow#35508 · 27 comments · 2 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Allow safe cast from int64 to float64 in compute kernel for numerics that can be accurately represented above 2^53 Open

Component: C++ Type: enhancement

apache/arrow#35563 · 6 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
python - read multiple parquets that have different schema? Open

Component: Parquet Component: Python Type: usage

apache/arrow#35569 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Cannot call pyarrow.fs.initialize_s3 Open

Component: Python Type: bug

apache/arrow#35575 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Fixed size lists of numeric types without nulls could be converted to numpy with zero-copy Open

Component: Python Type: enhancement

apache/arrow#35622 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Can't provide Arrow array when filling nulls of a fixed size list array Open

Component: Python Type: bug

apache/arrow#35624 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Process parquet rowgroups without Arrow conversion Open

Component: C++ Component: Parquet Component: Python Status: needs champion Type: usage

apache/arrow#35638 · 27 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] `arrow::install_arrow()` doesn't use the same compiler arguments as `install.packages` Open

Component: R Type: bug

apache/arrow#35640 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[MATLAB] Add test verifying `arrow.array.<Type>Array` constructors accept all supported dimensions: `Nx1`, `1xM`, `1x0`, `0x1`, `0x0` Open

Component: MATLAB Type: enhancement

apache/arrow#35643 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Documentation] Clarify language around use_deprecated_int96_timestamps Open

Component: Documentation Component: Python Type: enhancement

apache/arrow#35645 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Convert multidimensional arrays into FixedShapeTensorArrays automatically in `pyarrow.array` Open

Component: Python Status: needs champion Type: enhancement

apache/arrow#35647 · 5 comments · 3 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] pa.compute.fill_null where fill value is FixedSizedBinaryArray fails with unexpected error Open

Component: Python Type: bug

apache/arrow#35650 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Parquet][PyArrow] Cannot save footer files outside the parquet file Open

Component: Parquet Component: Python Type: usage

apache/arrow#35678 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Best way to add columns to an existing Feather file (>10GB) in terms of performance in python Open

Component: Other Component: Python Type: usage

apache/arrow#35689 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][R] Cannot open S3 paths that are already have URL-encoding (literal percent-encoding) characters Open

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

apache/arrow#35714 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] open_dataset() on long vec of URIs uses much more RAM & is much slower than on partition root. Open

Component: R Priority: Critical Type: bug

apache/arrow#35715 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] pa.array([Decimal("nan")]) raises Open

Component: Python Type: bug

apache/arrow#35717 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Recognize pandas arrays in the array() constructor for the from_pandas argument Open

Component: Python Type: bug

apache/arrow#35721 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] [Parquet] Compression degradation when column type changed from INT64 to INT32 Open

Component: Parquet Component: Python Type: bug

apache/arrow#35726 · 22 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][CI] Sporadic UCX test timeout Open

Component: C++ Component: Continuous Integration Component: FlightRPC Type: bug

apache/arrow#35742 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] Add from_numpy_ndarray and to_numpy_ndarray to ListArray types Open

Component: Python Type: enhancement

apache/arrow#35747 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[R][C++][Dataset] open_dataset and open_csv_dataset do not use skip argument Open

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

apache/arrow#35756 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Leaf columns? Open

Component: C++ Type: usage

apache/arrow#35766 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
How to pass ArrowTable from Python to C++ via ctypes or Cython in the same process? Open

Component: C++ Component: Python Type: usage

apache/arrow#35773 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Should we support PARQUET_2_8 version? Open

Component: C++ Component: Parquet Type: enhancement

apache/arrow#35776 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] MemoryPool::Allocate returns an error when the user provides small values for alignment Open

Component: C++ Type: enhancement

apache/arrow#35793 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Support pandas dtype_backend=pyarrow in to_pandas Open

Component: Python Type: enhancement

apache/arrow#35802 · 7 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Compute] Function 'utf8_trim' has no kernel matching input types (dictionary<values=string, indices=int64, ordered=0>) Open

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

apache/arrow#35815 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Handle only relevant slices of child arrays when hashing scalars from ListArrays Open

Component: C++ Type: enhancement

apache/arrow#35830 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
orc.write_table performance degradation when writing table with structs Open

Component: Python Type: bug

apache/arrow#35840 · 0 comments · 3 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] get_fragments filter argument not filtering on statistics Open

Component: C++ Component: Python Type: bug

apache/arrow#35841 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Minimum required numpy version (1.16.6) has security vulnerability Open

Component: Python Type: bug

apache/arrow#35846 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++] Can InputType support nested types in the future? Open

Component: C++ Type: enhancement

apache/arrow#35863 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][CI] Enable CMAKE_UNITY_BUILD on more debug builds Open

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

apache/arrow#35873 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Problem when used from "qlora", huggingface. Does not clean up, and dumps core. Open

Component: C Component: C++ Type: bug

apache/arrow#35876 · 9 comments · 3 reactions · 0 assignees · Indexed Sep 14, 2026
parquet.read_table opens files twice Open

Component: Python Type: bug

apache/arrow#35894 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
reader_writer2.cc seems to produce bad parquet file. Open

Component: C++ Component: Parquet Type: usage

apache/arrow#35897 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] pyarrow.csv.write_csv crashes when writing tables containing FixedSizeBinaryArray Open

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

apache/arrow#35901 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] pyarrow.jvm.record_batch may cause memory leak with scoped allocator on java side Open

Component: Python Type: bug

apache/arrow#35905 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Release][CI] Improve versions used on jobs executed on maintenance branch Open

Component: Continuous Integration Component: Release Type: enhancement

apache/arrow#35908 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Modular Encryption prints encryption key in error message, in case using wrong key for encryption Open

Component: Parquet Component: Python Type: bug

apache/arrow#35919 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] ArrowInvalid: Failed to parse string: '2acv' as a scalar of type double Open

Component: C++ Type: bug

apache/arrow#35925 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

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