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

[C++][FlightRPC] Memory alignment related warning Open

Component: C++ Component: FlightRPC Type: usage

apache/arrow#37195 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Nullability not maintained when casting a column Open

Component: Python good-second-issue Type: bug

apache/arrow#37219 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Extract the internals of the RunEndEncode kernel out of compute/ Open

Component: C++ Type: enhancement

apache/arrow#37221 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++][Python] Exception ignored in: 'pyarrow._substrait._create_named_table_provider' Open

Component: C++ Component: Python Type: bug

apache/arrow#37235 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Wrap up ListView and LargeListView implementations Open

Component: C++ Type: enhancement

apache/arrow#37249 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][FlightRPC] Is it possible to use pyarrow.dataset as an abstraction over arrow-flight data? Open

Component: FlightRPC Component: Python Type: usage

apache/arrow#37278 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] pa.scalar(pd.Timedelta) with second or millisecond unit performs invalid conversion Open

Component: Python Type: bug

apache/arrow#37291 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Dev][Release] Verification script fails detecting CUDA Open

Component: Developer Tools Component: Release Type: bug

apache/arrow#37296 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Error passing data to/from DuckDB - "NotImplemented: Call to R (SafeRecordBatchReader::ReadNext()) from a non-R thread from an unsupported context" Open

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

apache/arrow#37302 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][CI] Enable warnings as errors in pytests for CI jobs Open

Component: Python Type: enhancement

apache/arrow#37310 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++][Python] pyarrow.ChunkedArray.combine_chunks is slow Open

Component: Python Type: enhancement

apache/arrow#37318 · 5 comments · 1 reaction · 1 assignee · Indexed Sep 14, 2026
[C++] Support IS DISTINCT and IS NOT DISTINCT expression. Open

Component: C++ Type: enhancement

apache/arrow#37320 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Implement REE support in ArrayFromJSONString Open

Component: C++ good-second-issue Status: needs champion Type: enhancement

apache/arrow#37338 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] array constructor ignore time zone in `type` Open

Component: Python Type: bug

apache/arrow#37342 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][FlightRPC] Implement async versions of other metadata methods Open

Component: C++ Component: FlightRPC Type: enhancement

apache/arrow#37343 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++][FlightRPC][Python] Unit-test and expose TransportStatusDetail Open

Component: C++ Component: FlightRPC Component: Python Type: enhancement

apache/arrow#37344 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] pyarrow.parquet.read_table with filters is broken for timezone aware datetime since 13.0.0 release Open

Component: Parquet Component: Python Type: bug

apache/arrow#37355 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][IPC] Allow a more fine-grained column selection for reading data with nested fields Open

Component: C++ Type: enhancement

apache/arrow#37358 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Expose StreamDecoder to pyarrow python API Open

Component: Python Type: enhancement

apache/arrow#37390 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] clang-format result may be invalid for cpplint.py Open

Component: C++ Type: enhancement

apache/arrow#37396 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Support Nested Loop Join node. Open

Component: C++ Type: enhancement

apache/arrow#37397 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python][Parquet] Cannot read parquet with duplicate column names Open

Component: Parquet Component: Python Type: bug

apache/arrow#37428 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Passing a large dataset to duckdb and back results in memory being used and not freed Open

Component: R Type: bug

apache/arrow#37495 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Define a Dataset protocol based on Substrait and C Data Interface Open

Component: Python Type: enhancement

apache/arrow#37504 · 9 comments · 9 reactions · 1 assignee · Indexed Sep 14, 2026
[R][C++] DecodeRowGroups segfault calling dplyr::glimpse() or head() on a large dataset Open

Component: R Priority: Critical Type: bug

apache/arrow#37513 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Left join doesn't preserve order of left for right missing values Open

Component: Python Type: bug

apache/arrow#37542 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs][FlightRPC] Update documentation to note that `FlightInfo::schema` may be null Open

Component: Documentation Type: enhancement

apache/arrow#37554 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] TaggedRecordBatch does not implement operator== Open

Component: C++ Type: bug

apache/arrow#37556 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Using BMI to implement filter pushdown Open

Component: C++ Component: Parquet Type: enhancement

apache/arrow#37559 · 54 comments · 5 reactions · 0 assignees · Indexed Sep 14, 2026
Reading back (some) Parquet int96 timestamps provides wrong round-trip results Open

Component: C++ Component: Parquet Component: Python Type: bug

apache/arrow#37580 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] pyarrow.dataset.write_dataset doesn't write empty datasets, even if they had a schema, thus losing it when reading back the dataset Open

Component: Python Type: bug

apache/arrow#37583 · 6 comments · 3 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Reduce template parameters for aggregate functions Open

Component: C++ Type: enhancement

apache/arrow#37585 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Parquet] pyarrow.parquet.ParquetFile.metadata shows deprecated min/max only not min_value/max_value Open

Component: Python Type: bug

apache/arrow#37604 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Parquet] Dataset: Parquet Writer Supports user memory-pool Open

Component: C++ Component: Parquet Type: enhancement

apache/arrow#37606 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
irrelevant message displayed `WARN DFSClient: zero` Open

Component: C++ Type: bug

apache/arrow#37622 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add software implementation of PDEP and reenable BMI2 code paths on all AVX2 CPUs Open

Component: C++ Type: enhancement

apache/arrow#37623 · 8 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Python][Parquet] read_table much slower with multiple row group files when column pruning than single row group Open

Component: Parquet Component: Python Type: bug

apache/arrow#37666 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Flight] Improve error message when port cannot be bound with gRPC Open

Component: FlightRPC Type: enhancement

apache/arrow#37673 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++][Python] Converting string to timestamp silently overflows Open

Component: Python Type: bug

apache/arrow#37691 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Individual RangeIndex not preserved with partitioning Open

Component: Python Type: bug

apache/arrow#37699 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] re2_SOURCE=BUNDLED on macOS failed Open

Component: C++ Type: bug

apache/arrow#37716 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Memory leak in s3 filesystem Open

Component: C++ Type: bug

apache/arrow#37721 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Table contains dictionary encoding with negative index Open

Component: Python Type: bug

apache/arrow#37732 · 4 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[MATLAB] Consider renaming `field()`, `column()` and `chunk()` methods to `getField()`, `getColumn()`, and `getChunk()` Open

Component: MATLAB Type: enhancement

apache/arrow#37740 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[FlightSQL] Support `DoExchange` (in addition to `DoPut`) to bind parameters and execute prepared statements Open

Component: FlightRPC Type: enhancement

apache/arrow#37741 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Parquet] Writing a parquet table fails with `segfault` Open

Component: Parquet Component: Python Type: bug

apache/arrow#37747 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
`split_whitespace` sporadically produces different results on MacOS Open

Component: Python Type: bug

apache/arrow#37757 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] existing_data_behavior = "overwrite" does not work as expected in arrow::write_dataset Open

Component: R Priority: Critical Type: bug

apache/arrow#37760 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Argument names ignored in schema supplied as `in_type` argument to `register_scalar_function()` Open

Component: R Priority: Medium Type: bug

apache/arrow#37761 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] case when expression divide overflow. Open

Component: C++ Type: bug

apache/arrow#37765 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

apache/arrow

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