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Open Issues (last 90 days)

41

Issues from New Contributors

22

Open PRs (last 90 days)

49

PRs from New Contributors

31

Open issues from last 90 days (new contributors highlighted)
Date Title
2026-10-01 [Python] Provide more informative error message for certain numpy -> arrow conversions
2026-10-01 [Python][Parquet] Errno 14 Error reading bytes from file with pyarrow.parquet.ParquetFile(), but consistently succeeds on second try
2026-09-29 [Python] Casting a struct with a null-typed field to its own type gives an invalid array
2026-09-29 [Python] Directly constructed FunctionOptions segfaults in serialize()
2026-09-28 [Python][C++] Casting list_view to list ignores the view sizes and gives wrong results
2026-09-27 [Python] DataFrame interchange silently corrupts non-native-endian columns.
2026-09-26 [Python] pyarrow.compute.strftime silently echoes unsupported format specifiers (%s returns the literal ‘%s’)
2026-09-25 [Python][C++][Dataset][Parquet] Row-group statistics drop NaN rows for != and negated comparisons on float columns
2026-09-24 [Python] Fix dlpack related deprecation warnings
2026-09-23 [Python][Annotations] Add pyrefly check to CI
2026-09-19 [Python] pyarrow.arange() segfaults for an int64 range with 2**63 elements
2026-09-11 [Python] Fix deprecation warnings in the tests with numpy/pandas nightly
2026-09-10 [Python] get_partition_keys segfaults when the partition expression is None
2026-09-09 [Python][Parquet] Reorganize Parquet reader docstrings
2026-09-09 [Python][Docs][CI] Disabled numpydoc PR02 check may skip PR03
2026-09-08 [Python] flight wrappers and ParquetReader segfault when used without initialized native state
2026-09-08 [Python] call_tabular_function() segfaults for some wrong typed func_registry values
2026-09-07 [Python][GPU] numba-cuda dependency is maintenance mode only
2026-09-03 [Python][Parquet] Improve usability of ParquetDataset
2026-08-30 [Python][Interchange] from_dataframe drops the categorical ordered flag
2026-08-30 [Python] Several APIs segfault when required Arrow object arguments are None
2026-08-30 [Python] Several APIs segfault instead of rejecting arguments of the wrong type
2026-08-28 [Python] KeyValueMetadata.key() segfaults on an out-of-range index
2026-08-27 [C++][Python] pyarrow.compute.indices_nonzero segfaults on a ChunkedArray with zero chunks
2026-08-25 [CI][Python] CMakeLists detects ccache but not sccache
2026-08-24 [Python][Annotations] Should structure of annotations reflect structure of PyArrow at runtime
2026-08-23 [Python] concat_tables silently ignores unrecognised keyword arguments, including unify_schemas
2026-08-07 [Python] pa.output_stream() aborts the process on a read-only buffer
2026-08-06 [Python] Use CPython Limited APIs in python/pyarrow
2026-07-27 [C++][Python] Significant performance degradation after pyarrow 24.0.0 to 25.0.0 upgrade
2026-07-27 [Python] s3fs selector count is not asserted
2026-07-23 [Python][Parquet] Expose SizeStatisticsLevel in the Parquet writer API
2026-07-22 [Python] Define whether user-overridden to_pylist on Array subclasses is honored for nested children
2026-07-22 [Python] Debian job on i386 segfaults when running Python tests
2026-07-17 [Python] test_assume_timezone does not assert nonexistent and ambiguous results
2026-07-15 [C++][Python] Casting nested structs fails when inner struct are non-nullable, but the field for the inner struct is nullable
2026-07-10 [C++][Python] PyArrow Parquet writer fails writing [null] for null structs, but Datafusion works. Need to add [null] to current working [“”] for NULLs.
2026-07-09 [Python] Int64Scalar and related instances should subclass the appropriate numbers abstract base class (abc)
2026-07-09 [Python] Convert to_pylist fast paths per range instead of per element
2026-07-08 [Python] Convert maps to dicts without per-element Scalars in to_pylist(maps_as_pydicts=…)
2026-07-02 [Python] Add AGENTS.md
Open PRs from last 90 days (new contributors highlighted)
Date Title
2026-10-01 GH-44741: [Python][Docs] Clarify that ParquetSchema lists leaf columns
2026-09-29 GH-51612: [C++] Fix list_view to list cast
2026-09-29 GH-51639: [C++][Python] Fix invalid result when casting struct with null-typed child to its own type
2026-09-29 GH-51265: [Python][Parquet] Reorganize Parquet reader docstrings
2026-09-29 GH-40502: [C++][Python] Expose NativeFile.abort()
2026-09-29 GH-51265: [Python] Refactor and centralize duplicated reader docstrin…
2026-09-28 GH-33295: [C++][Python] Add list_contains compute function
2026-09-27 GH-51548: [Python] Fix silent corruption in non-native-endian dataframe imports
2026-09-27 GH-48111: [C++][Dataset] Fix scans hanging with zero fragment readahead
2026-09-23 GH-51474: [Python][Annotations] Add pyrefly check to CI
2026-09-21 GH-51301: Fix deprecation warnings in the tests with numpy/pandas nightly
2026-09-17 GH-50398/GH-50829 6/6: CI: ship cp311-abi3 wheels with symbol audit and perf gates
2026-09-17 GH-50398/GH-50829 4/6: Build pyarrow with Py_LIMITED_API (cp311-abi3)
2026-09-17 GH-50398/GH-50829 1/6: Use more CPython Limited APIs in python/pyarrow
2026-09-11 GH-51301: [Python] Fix NumPy and pandas nightly warnings
2026-09-11 GH-29839: [C++][Python][R] Rename binary set lookup functions
2026-09-10 GH-51293: [Python] Reject a null Expression in two public APIs
2026-09-10 GH-38444: [Python] Handle out-of-range date scalar repr
2026-09-08 GH-51228: [Python] Raise instead of crashing on an invalid registry
2026-09-07 GH-51215: [C++] Migrate remaining datetime consumers to the chrono shim
2026-09-06 GH-39914: [pyarrow] Fall back to schema field type for unparseable complex dtype metadata
2026-09-05 GH-51042: [Python] Reject invalid Arrow wrapper types
2026-09-04 GH-51043: [Python] Reject null required Arrow objects
2026-08-31 GH-46421: [C++][Acero] Asofjoin respect PauseProducing from downstream. Version 2
2026-08-29 GH-51037: [C++] Replace RapidJSON with simdjson in JSON parser
2026-08-28 GH-51019: [Python] Raise IndexError for out-of-bounds KeyValueMetadata key/value
2026-08-23 GH-50957: [Python] Reject unexpected concat_tables keywords
2026-08-23 GH-38809: [Python] Add tests for struct type promotion in concat_tables
2026-08-20 GH-49437: [Python][GPU] Support legacy and native Numba CUDA context handles
2026-08-18 GH-50906: [Python] Reshape 1D tensors to 2D in SparseCSR/CSC matrix conversion
2026-08-17 GH-35650: [Python] Cast array fill values in fill_null instead of as_py()
2026-08-15 GH-48231 [C++][Parquet] Add FSST encoding support for Parquet
2026-08-14 GH-50866: [Python][Parquet] Add use_threads to ParquetWriter to encode a row group’s columns in parallel
2026-08-09 GH-50665: [Python] Assert s3fs selector result count
2026-08-09 GH-46918: [Python] Respect explicit Field type in add_column/set_column
2026-08-09 GH-50831: [Python] Avoid aborting on read-only output buffers
2026-08-04 GH-25505: [C++][Python] Add replace_with_indices compute kernel
2026-08-02 GH-50658: [C++][Dev] Add RunEndEncoded support to gdb_arrow.py
2026-07-28 GH-50695: [C++] Use the full unsigned range for unsigned dictionary index types
2026-07-27 GH-50657: [C++][Dev] Implement BinaryView support in gdb_arrow.py
2026-07-27 GH-50659: [C++][Dev] Implement ListView support in gdb_arrow.py
2026-07-24 GH-50342: [Python] Add AGENTS.md
2026-07-23 GH-50619 [Python][Parquet] Expose size statistics level in the Parquet writer
2026-07-20 GH-49384: [Python] Respect copy=True in ChunkedArray.__array__
2026-07-19 GH-50515: [C++][Compute] Respect parent validity bitmap when casting nested structs with non-nullable fields
2026-07-08 GH-50429: [Python] Convert maps to dicts without per-element Scalars in to_pylist
2026-07-07 GH-50829 [Python] Use more CPython Limited APIs in python/pyarrow
2026-07-05 GH-30894: [C++][Python] Fix Table::Slice returning incorrect length f…
2026-07-04 GH-50530: [Python] Assert assume_timezone results at input precision

Open Issues (last 90 days)

8

Issues from New Contributors

4

Open PRs (last 90 days)

7

PRs from New Contributors

3

Open issues from last 90 days (new contributors highlighted)
Date Title
2026-09-30 [R] Datasets umbrella ticket
2026-09-30 [R] Expose ignore_extra_columns and pad_short_rows CSV parse options
2026-09-30 [R] CRAN packaging checklist for version 26.0.0
2026-09-27 [C++][R] Deadlock in IPC dataset scan with a small IO thread pool: synchronous reader re-open inside MergedGenerator lock
2026-09-24 [R] allow building with shared snappy
2026-09-07 [R] ALTREP crash in base R due to use-after-free
2026-07-23 [R] Make better use of field metadata
2026-07-23 [R] R bindings fail to build on WinARM
Open PRs from last 90 days (new contributors highlighted)
Date Title
2026-09-30 GH-51659: [R] Expose ignore_extra_columns and pad_short_rows CSV pars…
2026-09-12 GH-51267: [C++] Add std::chrono opt-in with toolchain feature detection
2026-09-11 GH-29839: [C++][Python][R] Rename binary set lookup functions
2026-09-10 GH-51198: [R] ALTREP crash in base R due to use-after-free
2026-09-08 GH-39793: [R] Export the C Data Interface allocators and document $export_to_c() / $import_from_c()
2026-09-07 GH-51215: [C++] Migrate remaining datetime consumers to the chrono shim
2026-07-04 GH-38217: [R] Map format = “text” to format = “csv” in write_dataset()

Open Issues (last 90 days)

89

Issues from New Contributors

22

Open PRs (last 90 days)

96

PRs from New Contributors

47

Open issues from last 90 days (new contributors highlighted)
Date Title
2026-10-02 [C++][Release] verify-rc-source-windows fails with latest simdjson (5.0.1) from conda
2026-10-02 [C++] test-ubuntu-22.04-cpp-emscripten fails tests trying to construct threads (ARROW_ENABLE_THREADING should be OFF)
2026-10-02 [C++][Parquet] Content-defined chunking resets its state at every row group
2026-10-01 [C++][Parquet] Error when printing file metadata
2026-09-30 [C++][Gandiva] Race condition with Gandiva expressions
2026-09-30 [C++][Parquet] Encoding fuzzer should tell fuzzing engine about invalid parameters
2026-09-29 [C++][Parquet] int32 offset overflow in dictionary SetDict causes heap out-of-bounds write
2026-09-29 [C++][Parquet] Wrong statistics for dictionary-encoded string columns: nulls under a null struct are not counted, unused dictionary values end up in min/max
2026-09-28 [C++][FlightRPC][ODBC] Universal macOS installer
2026-09-28 [C++] ListArray::FromListView gives wrong nulls for sliced list-view arrays
2026-09-28 [Python][C++] Casting list_view to list ignores the view sizes and gives wrong results
2026-09-27 [C++] Add type_id to arrow::ArrayBuilder
2026-09-27 [C++][R] Deadlock in IPC dataset scan with a small IO thread pool: synchronous reader re-open inside MergedGenerator lock
2026-09-25 [Python][C++][Dataset][Parquet] Row-group statistics drop NaN rows for != and negated comparisons on float columns
2026-09-24 [C++] Remove ConsumeWhitespace from JSON chunker after updating simdjson
2026-09-24 [C++][Parquet] The AVX2 dispatch target for FindMinMax is not vectorised
2026-09-22 [C++] Allocate input buffers with sufficient capacity for SIMDJSON padding
2026-09-21 [C++] Avoid duplicating value offsets buffer for 0-length array slices
2026-09-19 [C++][Docs] Replace RapidJSON with simdjson in row converter example
2026-09-18 [C++] Hash-collision CPU amplification building the Schema/StructType field-name index
2026-09-17 [C++] Remove unused arrow::internal::LruCache and the corresponding tests and benchmarks
2026-09-16 [C++][Parquet] Update bundled Apache Thrift to 0.24.0 for CVE-2026-55969
2026-09-16 [C++][Parquet] FileKeyWrapper uses KMSConnectionConfig without setting default values
2026-09-15 [C++][FlightRPC][ODBC] Fix statement descriptor and cursor lifecycle
2026-09-15 [C++] Add RISC-V Vector (RVV) support and dynamic dispatch
2026-09-11 [C++] Make float16 part of FloatingPointTypes()
2026-09-11 [C++] GZipCodec::Init does deflateInit and immediately throws it away
2026-09-10 [C++] Add iterator-based variants of bit-run visitors
2026-09-10 [C++] Allow the CSV Reader to accept multi-character delimiters
2026-09-09 [C++][Parquet] Speed up DELTA_BINARY_PACKED decoding
2026-09-09 [C++] Remove the vendored datetime fallback when toolchain support permits
2026-09-07 [C++][Gandiva] Reduce dependency on vendored date.h library
2026-09-02 [C++][CI] Remove the macOS workaround for deprecated Abseil APIs in google-cloud-cpp
2026-08-29 [C++] Replace RapidJSON with simdjson in JSON parser
2026-08-27 [C++][Python] pyarrow.compute.indices_nonzero segfaults on a ChunkedArray with zero chunks
2026-08-26 [C++] Bump vendored utfcpp
2026-08-26 [C++] Remove vendored whereami
2026-08-25 [C++][Compute] Support comparison kernels for mixed StringView/BinaryView and standard Binary/String types
2026-08-25 [C++][Compute] Implement casting from ListView/LargeListView to List/LargeList
2026-08-24 [C++][Parquet] “Keep redacted metadata version for old readers”
2026-08-24 [C++] Provided more options in CSV reader’s ParseOptions and ReadOptions
2026-08-24 [C++] Out-of-bounds read in DecimalRescale for a scale delta larger than kMaxScale
2026-08-18 GH-50906: [Python] Reshape 1D tensors to 2D in SparseCSR/CSC matrix conversion
2026-08-17 [C++][Gandiva] Out-of-bounds read in soundex_utf8 mappings lookup
2026-08-17 [C++][Parquet] Introduce FileType reference implementation
2026-08-16 [C++] is_null kernel does not propagate nan_is_null for nested types
2026-08-15 [C++] Add support for List and LargeList types to replace_with_mask
2026-08-12 [C++][FlightRPC][ODBC] SQL_ATTR_CURRENT_CATALOG (and SQL_DESC_NAME) decode a wide string with the byte-wise decoder
2026-08-10 [C++][Packaging] TST: arrow-flight-test started hanging on windows
2026-08-06 [C++][FlightRPC][ODBC] Add SQLGetInfo missing tests
2026-08-06 [C++][Parquet] Make DELTA_BYTE_ARRAY value reconstruction storage-agnostic
2026-08-05 [C++][IPC] Improve sparse tensor index validation
2026-08-04 [C++][FlightSQL][ODBC][SQLForeignKeys] Implement SQLForeignKeys catalog function
2026-08-04 [C++][FlightSQL][ODBC][SQLPrimaryKeys] Implement SQLPrimaryKeys catalog function
2026-07-31 [C++] ARROW_STATIC_INSTALL_INTERFACE_LIBS declarations are usually forgotten because they are separate
2026-07-30 [Docs][Doc][C++] run-end-encoding functions not listed in compute functions
2026-07-29 [C++] Replace std::is_same_v with std::same_as
2026-07-29 [C++][Parquet] Support limit RowGroup size by bytes.
2026-07-29 [C++][Parquet] Reading dictionary-encoded BYTE_ARRAY columns is slow due to per-value appends and buffer growth reallocations
2026-07-29 [C++] ComputeLogicalNullCount crashes for dictionary arrays with null value type
2026-07-28 [C++][Parquet] Add IEEE-754 total order and nan count for floating types
2026-07-27 [C++][Python] Significant performance degradation after pyarrow 24.0.0 to 25.0.0 upgrade
2026-07-27 [C++][Dev] Implement ListView support in gdb_arrow.py
2026-07-27 [C++][Dev] Implement RunEndEncoded support in gdb_arrow.py
2026-07-27 [C++][Dev] Implement BinaryView support in gdb_arrow.py
2026-07-27 [C++][Dev] Implement missing data types in gdb_arrow.py
2026-07-26 [C++][Compute] Optimize min/max_element_wise with word at a time validity handling
2026-07-25 [C++][Engine] Substrait consumer silently drops modern FetchRel and AggregateRel fields
2026-07-24 [Parquet][C++] Optimize RecordReader for flat optional
2026-07-22 [C++] AppendScalar implementation uses polymorphism
2026-07-22 [C++] Add a VisitIntegerType helper
2026-07-20 [C++] LevelDecoder::Decode，internal::FindMinMax consume lots of cpu
2026-07-16 [C++] Invalid MSVC flag causes nuisance C++ build warnings
2026-07-15 [C++] RunEndEncodedBuilder does not merge consecutive NaN values
2026-07-15 [C++][Python] Casting nested structs fails when inner struct are non-nullable, but the field for the inner struct is nullable
2026-07-15 [C++] Choose the Correct Value in ArrayBuilder::AppendEmptyValue() for Floating-Point Types
2026-07-14 [C++] Clarify that RunEndEncodedBuilder::AppendScalar Only Accepts std::shared_ptr
2026-07-14 [C++][Gandiva] Out-of-bounds read in upper/lower/initcap on truncated trailing UTF-8
2026-07-13 [C++] REEBuilder Produces Incorrect Values When Using AppendArraySlice
2026-07-11 [C++][Compute] Support string_view/binary_view in scalar string predicate kernels
2026-07-11 [C++][Gandiva] Integer overflow in mask output buffer size causes heap overflow
2026-07-10 [C++][Python] PyArrow Parquet writer fails writing [null] for null structs, but Datafusion works. Need to add [null] to current working [“”] for NULLs.
2026-07-09 [C++][Parquet] Add Skip on Parquet decoders
2026-07-09 [C++][CMake] Invalid version script argument supplied to MSVC linker
2026-07-07 [C++] Add BinaryDataBuilder class
2026-07-03 [C++] KeyValueMetadata::DeleteMany method crashes with duplicate 0 indexes
2026-07-03 [C++] KeyValueMetadata Bugs
2026-07-03 [C++] KeyValueMetadata accepts duplicate keys
2026-07-02 [C++] Add AGENTS.md to C++ dir
Open PRs from last 90 days (new contributors highlighted)
Date Title
2026-10-02 GH-51687: [C++] Skipt tests that require threads if ARROW_ENABLE_THREADING=OFF
2026-10-02 GH-51684: [C++][Parquet] Keep the CDC chunking state across row groups
2026-10-01 GH-51670: [C++][Dev] Fix shellcheck errors in the cpp/examples/minimal_build directory
2026-09-30 GH-51663: [C++][Gandiva] Race condition with Gandiva expressions
2026-09-30 GH-51649: [C++][Parquet] Tell encoding fuzzer to skip inputs with invalid parameters
2026-09-29 GH-51612: [C++] Fix list_view to list cast
2026-09-29 GH-51639: [C++][Python] Fix invalid result when casting struct with null-typed child to its own type
2026-09-29 GH-40502: [C++][Python] Expose NativeFile.abort()
2026-09-29 GH-51626: [C++][Parquet] Fix statistics of dictionary-encoded leaves under null parents
2026-09-28 GH-33295: [C++][Python] Add list_contains compute function
2026-09-28 GH-51547: [C++][R] Reopen IPC dataset reader asynchronously
2026-09-27 GH-51354: [C++][Parquet] Update bundled Apache Thrift to 0.24.0
2026-09-27 GH-48111: [C++][Dataset] Fix scans hanging with zero fragment readahead
2026-09-24 GH-51308: [C++] Initialize gzip codec state lazily
2026-09-24 GH-51476: [C++][Parquet] Vectorise FindMinMax explicitly
2026-09-21 GH-51406: [C++] Change how value offsets are built
2026-09-18 GH-51009: [C++] Bump vendored utfcpp to 4.2.0
2026-09-18 GH-45876: [C++][Acero] Make NormalizeTime order-preserving
2026-09-17 GH-51367: [C++] Remove unused arrow::internal::LruCache and its tests/benchmarks
2026-09-17 MINOR: [C++] Fix grammar in error message and comment
2026-09-17 GH-45723 unsafeappend to FixedSizeListBuilder
2026-09-17 GH-50398/GH-50829 6/6: CI: ship cp311-abi3 wheels with symbol audit and perf gates
2026-09-17 GH-50398/GH-50829 4/6: Build pyarrow with Py_LIMITED_API (cp311-abi3)
2026-09-15 GH-51341: [C++][FlightRPC][ODBC] Fix statement descriptor and cursor lifecycle
2026-09-14 GH-51311: [C++][Compute] Add float16 to FloatingPointTypes
2026-09-14 GH-50517: [C++] RunEndEncodedBuilder does not merge consecutive NaN values
2026-09-12 GH-32438: [C++] Create target file when OpenAppendStream targets a nonexistent path
2026-09-12 GH-51267: [C++] Add std::chrono opt-in with toolchain feature detection
2026-09-11 GH-51289: [C++] Add iterator-based bit-run traversal
2026-09-11 GH-29839: [C++][Python][R] Rename binary set lookup functions
2026-09-10 GH-51275: [C++] Allow the CSV Reader to accept multi-character delimiters
2026-09-07 GH-51215: [C++] Migrate remaining datetime consumers to the chrono shim
2026-09-06 GH-49817: [C++] Reject overflowing decimal strings
2026-09-02 GH-47393: [C++][Acero] Support for multi threaded input: SortedMergeNode Version 2
2026-09-02 GH-35815: [C++] Provided dictionary support for utf8_trim
2026-09-02 GH-51114: [FlightSQL][C++] Expose is_update field of PreparedStatement
2026-09-01 GH-50314: [C++][Parquet] Reject invalid DELTA_BINARY_PACKED headers
2026-08-31 GH-48561: [C++][Parquet] Optimize column reader by fusing definition level decoding with counting
2026-08-31 GH-47417: [C++] Fix JSON parser losing nulls in a null-typed list
2026-08-31 GH-46421: [C++][Acero] Asofjoin respect PauseProducing from downstream. Version 2
2026-08-29 GH-51037: [C++] Replace RapidJSON with simdjson in JSON parser
2026-08-28 GH-51018: [C++] Fix indices_nonzero segfault on chunkless ChunkedArray
2026-08-27 GH-14736: [C++] Propagate struct validity into union children
2026-08-25 GH-49841: [C++] Fix macOS 12.3 SDK build by using __cpp_lib_int_pow2
2026-08-24 GH-47576: [C++][Acero] Fix C++23 build
2026-08-24 GH-50964: [C++] fix out-of-bounds read in DecimalRescale for out-of-range scale
2026-08-21 GH-50893: [C++][Gandiva] Restrict Soundex table indexes to ASCII letters
2026-08-21 GH-50472: [C++][Gandiva] Guard mask length overflow and truncated UTF-8
2026-08-17 GH-50893: [C++][Gandiva] fix out-of-bounds read in soundex mappings lookup
2026-08-17 GH-50891: [C++][Parquet] DON’T MERGE NOW: Support FILE logical type
2026-08-15 GH-50879: [C++] Implement replace_with_mask for List and LargeList types
2026-08-15 GH-48231 [C++][Parquet] Add FSST encoding support for Parquet
2026-08-12 GH-50852: [C++][FlightRPC][ODBC] Decode wide connection/descriptor string attributes with the wide decoder
2026-08-11 GH-30431: [C++] Add EscapeStyle to CSV Writer for configurable escape control
2026-08-10 GH-50735: [C++] Add run-end encoding functions to compute docs
2026-08-10 GH-50828: [C++][FlightRPC][ODBC] Add SQLGetInfo remote tests
2026-08-09 GH-40128: [C++][Python] Preserve dictionaries in empty casts
2026-08-06 GH-50822 [C++][Parquet] Make DELTA_BYTE_ARRAY value reconstruction storage-agnostic
2026-08-04 GH-25505: [C++][Python] Add replace_with_indices compute kernel
2026-08-04 GH-50689: [C++][Parquet] Add IEEE-754 total order and nan count for floating types
2026-08-03 GH-49949: [C++][S3] Don’t call HeadBucket when creating directories
2026-08-03 GH-50699: [C++] Fix ComputeLogicalNullCount crash for null-typed dictionaries
2026-08-02 GH-50658: [C++][Dev] Add RunEndEncoded support to gdb_arrow.py
2026-07-31 GH-50762: [C++][Feather] Avoid reading outside sliced bitmap buffers
2026-07-31 GH-47774: [C++] Force-inlince Status::~Status() to improve reading performance
2026-07-30 GH-31374: [C++] Prevent strptime from normalizing invalid dates
2026-07-30 GH-48476: [C++] [Parquet] Add max_row_group_size writer property to limit row groups by compressed byte size
2026-07-29 GH-50703: [C++][Parquet] Reserve dictionary byte array data before decoding
2026-07-28 GH-50695: [C++] Use the full unsigned range for unsigned dictionary index types
2026-07-27 GH-50657: [C++][Dev] Implement BinaryView support in gdb_arrow.py
2026-07-27 GH-50659: [C++][Dev] Implement ListView support in gdb_arrow.py
2026-07-27 GH-50596: [C++] AppendScalar implementation uses polymorphism
2026-07-26 GH-50645: [C++][Compute] Optimize min/max_element_wise with word at a time validity handling
2026-07-25 GH-50634: [C++][Engine] Fix Substrait consumer silently dropping modern FetchRel/AggregateRel fields
2026-07-24 GH-50628: [C++][Parquet] Rework RecordReader to introduce flat optional optimization
2026-07-22 GH-43838: [Python][C++] Preserve nested NullType metadata in array views
2026-07-22 GH-50592: [C++][Gandiva] fix out-of-bounds read in evaluate_return_char_length
2026-07-20 GH-50548: [C++][Parquet] PERF: Avoid O(n) level range validation in LevelDecoder::Decode
2026-07-19 GH-50515: [C++][Compute] Respect parent validity bitmap when casting nested structs with non-nullable fields
2026-07-19 GH-50544: [C++][Gandiva] fix out-of-bounds read in round with most negative precision
2026-07-18 GH-50539: [C++][Gandiva] size varlen cast output from the formatter
2026-07-16 GH-50527: [C++] Remove ARROW_SSE4_2_FLAG for x86 MSVC
2026-07-16 GH-50522: [C++][Gandiva] fix heap overflow in aes_encrypt output sizing
2026-07-14 GH-50504: [C++][Gandiva] fix out-of-bounds read in upper/lower/initcap
2026-07-13 GH-35815: [C++][Compute] Support dictionary inputs in UTF-8 trim
2026-07-13 GH-50351 : [C++] KeyValueMetadata::DeleteMany method crashes
2026-07-12 GH-50308: [C++][IPC] Add input size validation to SparseCSFIndex::Make
2026-07-11 GH-50478: [C++][Compute] Support string_view/binary_view in scalar string predicate kernels
2026-07-11 GH-50472: [C++][Gandiva] fix integer overflow in mask output allocation
2026-07-09 GH-50449: [C++] Invalid version script argument supplied to MSVC linker
2026-07-07 GH-50282: [C++][FlightRPC] Refactor GRPC server and transport classes
2026-07-07 GH-50249: [C++] Add ArrayBuilder::IsValid and ArrayBuilder::IsNull
2026-07-05 GH-50351: [C++] Fix KeyValueMetadata::DeleteMany crash with duplicate…
2026-07-05 GH-50371: [C++][Gandiva] Fold common subexpressions before code generation
2026-07-05 GH-30894: [C++][Python] Fix Table::Slice returning incorrect length f…
2026-07-03 GH-50348: [C++] Fix duplicate keys issue in KeyValueMetadata
Activity Trends (2 years)
Dev Mailing List: LLM-generated summary of this month’s activity

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PRs by contributor type (last 18 months)
Recent PRs from new contributors
Date Title Author State
2026-10-01 GH-44741: [Python][Docs] Clarify that ParquetSchema lists leaf columns dannyshafer open
2026-09-30 GH-51659: [R] Expose ignore_extra_columns and pad_short_rows CSV pars… rajaryan2007 open
2026-09-29 GH-51612: [C++] Fix list_view to list cast rajaryan2007 open
2026-09-29 GH-51639: [C++][Python] Fix invalid result when casting struct with null-typed child to its own type kartik00052 open
2026-09-29 MINOR: [CI] Bump conda-incubator/setup-miniconda from 4.0.1 to 4.1.0 dependabot[bot] closed
2026-09-29 GH-51265: [Python][Parquet] Reorganize Parquet reader docstrings dannyshafer open
2026-09-29 GH-40502: [C++][Python] Expose NativeFile.abort() adrien-grl open
2026-09-29 GH-51265: [Python] Refactor and centralize duplicated reader docstrin… MarkCruz911 open
2026-09-27 GH-51354: [C++][Parquet] Update bundled Apache Thrift to 0.24.0 Hanayoshi-8744 open
2026-09-27 GH-51548: [Python] Fix silent corruption in non-native-endian dataframe imports tam3tamtam open
2026-09-27 GH-48111: [C++][Dataset] Fix scans hanging with zero fragment readahead maximilliangrand open
2026-09-26 GH-51495: [C++] Fix race in MergedGenerator that could drop an error and end the stream early kita-renji closed
2026-09-26 GH-51496: [C++] Fix 32-bit block offset overflows in SwissTable jachymb closed
2026-09-24 GH-51308: [C++] Initialize gzip codec state lazily lorenzhs open
2026-09-24 GH-31076: [C++] Reject overflowing STL allocation sizes aikhanjum closed
2026-09-23 GH-51474: [Python][Annotations] Add pyrefly check to CI samwgoldman open
2026-09-22 MINOR: [CI] Bump the apache-infrastructure-actions-stash group with 2 updates dependabot[bot] closed
2026-09-21 GH-51406: [C++] Change how value offsets are built rambleraptor open
2026-09-20 GH-51370: [C++][Parquet] Fix tracing column attributes gitedmond closed
2026-09-20 GH-38149: [C++][Parquet] Avoid rebuilding column paths during schema initialization namtran1812 open
2026-09-19 GH-51368: [C++] Fix CSV reader dropping ‘’ after a straddling ’ inside a quoted field iliasabk closed
2026-09-18 GH-51009: [C++] Bump vendored utfcpp to 4.2.0 mahesh-desu open
2026-09-18 GH-45876: [C++][Acero] Make NormalizeTime order-preserving abelianbee open
2026-09-17 GH-51367: [C++] Remove unused arrow::internal::LruCache and its tests/benchmarks basantjamwal open
2026-09-17 MINOR: [C++] Fix grammar in error message and comment basantjamwal open
2026-09-17 GH-51381:[C++] Fix grammar in error message and comment basantjamwal closed
2026-09-17 GH-50398/GH-50829 6/6: CI: ship cp311-abi3 wheels with symbol audit and perf gates fboudra open
2026-09-17 GH-50398/GH-50829 5/6: Add a limited-API symbol audit script for pyarrow fboudra closed
2026-09-17 GH-50398/GH-50829 4/6: Build pyarrow with Py_LIMITED_API (cp311-abi3) fboudra open
2026-09-17 GH-50398/GH-50829 3/6: Use the CPython Limited API in the remaining fast paths fboudra closed
2026-09-17 GH-50398/GH-50829 2/6: Remove pyarrow.benchmark and simplify parse helpers fboudra closed
2026-09-17 GH-50398/GH-50829 1/6: Use more CPython Limited APIs in python/pyarrow fboudra open
2026-09-17 GH-51367: [C++] Remove unused arrow::internal::LruCache and its tests/benchmarks basantjamwal closed
2026-09-16 MINOR: [MATLAB] Fix doubled parentheses in the pyrunfile link simpleqt closed
2026-09-16 MINOR: [Python] Fix the buffer parameter name in the interchange docstring simpleqt closed
2026-09-16 MINOR: [Dev] Fix the auto-posted title-check comment simpleqt closed
2026-09-15 [C++] Add RISC-V Vector (RVV) support and dynamic dispatch zhanchangbao-sanechips open
2026-09-15 [Python][Parquet] Reorganize Parquet reader docstrings KHARSHAVARDHAN-eng closed
2026-09-12 GH-32438: [C++] Create target file when OpenAppendStream targets a nonexistent path mohammadnaqvi04 open
2026-09-11 GH-51289: [C++] Add iterator-based bit-run traversal akashchamp open
2026-09-11 GH-51301: [Python] Fix NumPy and pandas nightly warnings akashchamp open
2026-09-11 GH-29839: [C++][Python][R] Rename binary set lookup functions faze-geek open
2026-09-11 GH-45876: [C++][Acero] Make NormalizeTime order-preserving abelianbee closed
2026-09-10 [WIP][POC][BenchmarkingOnly] PFOR interleaved and fastlanes numbers prtkgaur open
2026-09-10 GH-51268: [C++][Parquet] Scan DELTA_BINARY_PACKED deltas a vector at a time prtkgaur open
2026-09-10 MINOR: [C++][FlightRPC][ODBC] Add Linux validation artifacts for 25.0.1 xborder closed
2026-09-09 Eliminate unnecessary refcount traffic from shared_ptr parameters passed by value that don’t need to be hsutter closed
2026-09-09 GH-51268: [C++][Parquet] Unpack equal-width DELTA_BINARY_PACKED miniblocks in one call prtkgaur open
2026-09-09 GH-51268: [C++][Parquet] Avoid reloading DELTA_BINARY_PACKED decoder state for every value prtkgaur open
2026-09-08 GH-51143: [Format] Add Parquet FILE canonical extension type Mandukhai-Alimaa open
2026-09-08 GH-51007: [C++] Make uriparser an external dependency imtherealnaska closed
2026-09-08 MINOR: [CI] Bump matlab-actions/run-tests from 3.2.0 to 3.3.0 dependabot[bot] closed
2026-09-08 GH-51223: [C++] Fix copying sliced boolean arrays A-makarim closed
2026-09-08 GH-51225: [C++] utf8_normalize: compose for NFC and NFKC singhpratech closed
2026-09-08 GH-39793: [R] Export the C Data Interface allocators and document $export_to_c() / $import_from_c() singhpratech open
2026-09-07 GH-50571: [Ruby] Add schema-aware ArrowFormat::RecordBatch construction emecii closed
2026-09-07 GH-33432: [R] Match base/stringr semantics for str_replace() with NA replacement Gosling-dude closed
2026-09-06 GH-39914: [pyarrow] Fall back to schema field type for unparseable complex dtype metadata tritsystem open
2026-09-04 GH-51145: [Python] Accept Arrow integer scalars in slice methods YusefSyed closed
2026-09-03 GH-51156: [C++] Raise CapacityError instead of truncating binary values over 2 GiB ngoldbaum closed
2026-09-03 GH-51652: [Python] Add NumPy StringDType to Arrow conversion ngoldbaum closed
2026-09-03 [Experimental][WIP] Pfor delta encoding prtkgaur open
2026-09-02 GH-51131: [C++][CI] Remove obsolete google-cloud-cpp macOS workaround aryansk open
2026-09-02 GH-51114: [FlightSQL][C++] Expose is_update field of PreparedStatement ShivanshhhG open
2026-09-01 GH-51044: [Python] Reject read-only readinto destinations carrerasdarren-cell closed
2026-09-01 MINOR: [CI] Bump the apache-infrastructure-actions-stash group with 2 updates dependabot[bot] closed
2026-09-01 Bumping vendored uriparser imtherealnaska closed
2026-09-01 MINOR: [CI] Document Crossbow GitHub token maintenance berringtoni36-commits open
2026-09-01 MINOR: [CI] Bump the apache-infrastructure-actions-stash group with 2 updates dependabot[bot] closed
2026-08-31 GH-51096: [CI][C++] Remove useless test-file-cleanup and retry logic from run-test.sh Diveyam-Mishra closed
2026-08-31 MINOR: [CI] Bump apache/infrastructure-actions/stash/restore from 69afc125e535c4c41e7f1b7470f583087e0f344b to 984c2f4d3f941ae6a224ba81be9c7f0176a3c3b7 dependabot[bot] closed
2026-08-31 MINOR: [CI] Bump matlab-actions/setup-matlab from 3.0.1 to 3.1.0 dependabot[bot] closed
2026-08-31 MINOR: [CI] Bump apache/infrastructure-actions/stash/save from 69afc125e535c4c41e7f1b7470f583087e0f344b to 984c2f4d3f941ae6a224ba81be9c7f0176a3c3b7 dependabot[bot] closed
2026-08-31 GH-51029: [C++] Fix MapArray validation with unknown null count AnuragRaut08 closed
2026-08-30 GH-51046: [Python][Interchange] Preserve the categorical ordered flag in from_dataframe Kayvan-Zahiri open
2026-08-28 GH-51018: [C++] Fix indices_nonzero segfault on chunkless ChunkedArray waterWang open
2026-08-28 GH-51019: [Python] Raise IndexError for out-of-bounds KeyValueMetadata key/value waterWang open
2026-08-27 GH-14736: [C++] Propagate struct validity into union children Hei-MaoM open
2026-08-25 GH-51127: [C++] Fix is_null nan_is_null for dictionary-encoded float arrays shoemoney closed
2026-08-25 GH-49841: [C++] Fix macOS 12.3 SDK build by using __cpp_lib_int_pow2 1fanwang open
2026-08-25 GH-50987: [C++] Fix builds with the macOS 11.3 SDK 1fanwang closed
2026-08-24 GH-50995: [C++][Compute] Support mixed StringView and BinaryView comparison Jay846 closed
2026-08-24 GH-50994: [C++][Compute] Implement casting from ListView to List with zero-copy fast-path Jay846 closed
2026-08-24 GH-47576: [C++][Acero] Fix C++23 build jmcarcell open
2026-08-24 MINOR: [CI] Bump apache/infrastructure-actions/stash/restore from bc817c8e9ad7d8216aab74223e32ea391e233b2c to 69afc125e535c4c41e7f1b7470f583087e0f344b dependabot[bot] closed
2026-08-24 MINOR: [CI] Bump apache/infrastructure-actions/stash/save from bc817c8e9ad7d8216aab74223e32ea391e233b2c to 69afc125e535c4c41e7f1b7470f583087e0f344b dependabot[bot] closed
2026-08-24 GH-48977: [C++] Fix quadratic field name index construction on libc++ advitrocks9 closed
2026-08-23 GH-24093: [C++] Fix GetFileInfo for zero-byte S3 directory markers d33bs open
2026-08-23 GH-50957: [Python] Reject unexpected concat_tables keywords Sakshamm-Goyal open
2026-08-23 GH-38809: [Python] Add tests for struct type promotion in concat_tables slachiewicz open
2026-08-22 GH-32503: [Docs][Benchmarking] Document pull request benchmark hooks nightcityblade open
2026-08-22 MINOR: [Python] Fix FeatherDataset.read_pandas docstring referencing Parquet arnavahire19 closed
2026-08-21 GH-50934: [C++] Fix shellcheck errors in cpp/build-support/run-test.sh RohithPariki closed
2026-08-21 GH-50893: [C++][Gandiva] Restrict Soundex table indexes to ASCII letters VrtxOmega open
2026-08-21 GH-50472: [C++][Gandiva] Guard mask length overflow and truncated UTF-8 VrtxOmega open
2026-08-20 GH-50623: [C++][IPC] Fix extension-wrapped union IPC roundtrip Alb3e3 closed
2026-08-20 GH-49437: [Python][GPU] Support legacy and native Numba CUDA context handles contentis open
2026-08-19 GH-50915: [FORMAT] Allow TIMESTAMP logical type to annotate FIXED_LEN_BYTE_ARRAY(12) divjotarora closed
2026-08-18 GH-50910: [Parquet] Tolerate unrecognized logical/physical type combinations when reading divjotarora closed
2026-08-18 GH-50859: [C++] Build JsonWriter when Parquet is enabled without JSON Krishnanand-G closed
2026-08-17 GH-50897: [Python] Fix typo LZ0 -> LZO in ORC writer docstring maupatel closed
2026-08-17 MINOR: [CI] Bump apache/infrastructure-actions/stash/save from 0ba14156c9f4c3cfbe4b0c9f36339ab0f8d81e53 to bc817c8e9ad7d8216aab74223e32ea391e233b2c dependabot[bot] closed
2026-08-17 MINOR: [CI] Bump apache/infrastructure-actions/stash/restore from 0ba14156c9f4c3cfbe4b0c9f36339ab0f8d81e53 to bc817c8e9ad7d8216aab74223e32ea391e233b2c dependabot[bot] closed
2026-08-17 GH-35650: [Python] Cast array fill values in fill_null instead of as_py() Nishuuzz open
2026-08-16 GH-50623: [C++][Python] Fix IPC serialization for extension storage layouts fallenmi closed
2026-08-15 GH-31464: [C++][Python] Fix string filters with empty value sets fallenmi open
2026-08-15 MINOR: [C++][Documentation] Update tutorial docs to include parquet linking gotcha devanbenz open
2026-08-15 GH-50876: [C++][FS][Azure] Wait for Azurite to start booxter closed
2026-08-15 GH-50830: [C++][Parquet] Use JsonWriter for LogicalType::ToJSON() NathanChung4 closed
2026-08-14 GH-50866: [Python][Parquet] Add use_threads to ParquetWriter to encode a row group’s columns in parallel anniegracehu open
2026-08-13 GH-50524: [C++] Honor array offset in pairwise_diff Krishnanand-G closed
2026-08-13 GH-39660: [R] Document partition value types tomatotomata closed
2026-08-11 GH-50847: [Python] Add Type_RUN_END_ENCODED to _NESTED_TYPES set Nishuuzz closed
2026-08-11 GH-30431: [C++] Add EscapeStyle to CSV Writer for configurable escape control waterWang open
2026-08-10 GH-50735: [C++] Add run-end encoding functions to compute docs VedantRalekar open
2026-08-10 GH-45086: [C++] Fix heap buffer overflow in FillNullForward/Backward … tonyroberts closed
2026-08-10 GH-22342: [Format][Documentation] Clarify Union type ids erichanwang open
2026-08-10 GH-50828: [C++][FlightRPC][ODBC] Add SQLGetInfo remote tests erichanwang open
2026-08-09 GH-50665: [Python] Assert s3fs selector result count erichanwang open
2026-08-09 GH-50819: [Release] Increase YUM verification timeout erichanwang closed
2026-08-09 GH-50831: [Python] Avoid aborting on read-only output buffers erichanwang open
2026-08-06 MINOR: [Format] Fix docstrings in .fbs emilk closed
2026-08-04 GH-50622: [Docs][Format] Align Variant typed_value primitive type mappings with the Parquet shredding spec sdf-jkl closed
2026-08-04 GH-25505: [C++][Python] Add replace_with_indices compute kernel Kanishk-Dendukuri open
2026-08-04 GH-50801: [Python] Expose the record_batch_reader_source Acero node (RecordBatchReaderSourceNodeOptions) owenowenisme closed
2026-08-03 [WIP][POC] Pgaur on pair evaluation prtkgaur open
2026-08-03 MINOR: [CI] Bump matlab-actions/setup-matlab from 3.0.1 to 3.0.2 dependabot[bot] closed
2026-08-03 MINOR: [CI] Bump actions/stale from 10 to 11 dependabot[bot] closed
2026-08-03 MINOR: [CI] Bump docker/login-action from 4.5.1 to 4.6.0 dependabot[bot] closed
2026-08-03 MINOR: [CI] Bump matlab-actions/run-tests from 3.2.0 to 3.2.1 dependabot[bot] closed
2026-08-03 GH-50777: [CI][Dev] Fix shellcheck errors in the ci/scripts/r_test.sh KHARSHAVARDHAN-eng closed
2026-08-01 GH-50753: [C++] Co-locate static install interface libraries with dependencies KHARSHAVARDHAN-eng closed
2026-07-31 GH-50762: [C++][Feather] Avoid reading outside sliced bitmap buffers tcmartin open
2026-07-31 GH-47774: [C++] Force-inlince Status::~Status() to improve reading performance zhf999 open
2026-07-30 GH-31374: [C++] Prevent strptime from normalizing invalid dates fallintoplace open
2026-07-30 GH-48476: [C++] [Parquet] Add max_row_group_size writer property to limit row groups by compressed byte size zhf999 open
2026-07-30 GH-50735: [Documentation] List run-end compute functions Whning0513 closed
2026-07-30 GH-50707: [C++][Gandiva] Fix out-of-bounds read in mask functions KHARSHAVARDHAN-eng closed
2026-07-30 GH-50726: [CI][Docs] Use bundled simdjson for documentation builds KHARSHAVARDHAN-eng closed
2026-07-29 GH-50702: [Python] Fix .pyx changes requiring two builds to take effect pratyushadk closed
2026-07-29 GH-50595: [C++][UTIL] Add VisitIntegerType helper VedantRalekar closed
2026-07-29 GH-50703: [C++][Parquet] Reserve dictionary byte array data before decoding Punisheroot open
2026-07-28 GH-50674: Add support for recovering Yum repositories KHARSHAVARDHAN-eng closed
2026-07-28 GH-50666: [Release][CI] Use Ubuntu 24.04 for source verification jobs KHARSHAVARDHAN-eng closed
2026-07-28 GH-50395: [C++] Support duration inputs in temporal rounding snigdhachoppac closed
2026-07-27 MINOR: [CI] Bump actions/labeler from 6 to 7 dependabot[bot] closed
2026-07-27 MINOR: [CI] Bump docker/login-action from 4.4.0 to 4.5.1 dependabot[bot] closed
2026-07-27 GH-50657: [C++][Dev] Implement BinaryView support in gdb_arrow.py KHARSHAVARDHAN-eng open
2026-07-27 GH-50659: [C++][Dev] Implement ListView support in gdb_arrow.py KHARSHAVARDHAN-eng open
2026-07-27 GH-50596: [C++] AppendScalar implementation uses polymorphism KHARSHAVARDHAN-eng open
2026-07-27 GH-50636: [C++][R] Fix macOS 11.3 std::span construction in vector_sort KHARSHAVARDHAN-eng closed
2026-07-26 GH-50645: [C++][Compute] Optimize min/max_element_wise with word at a time validity handling Kanishk-Dendukuri open
2026-07-26 GH-50627: [C++] Migrate from_string.cc to simdjson KHARSHAVARDHAN-eng closed
2026-07-26 GH-50637: [C++] Register Abseil bundled static libraries in build_absl() KHARSHAVARDHAN-eng closed
2026-07-26 GH-50641: [C++][Compute] Fix correctness error in decimal round_binary kernel dmsa-or closed
2026-07-24 GH-50342: [Python] Add AGENTS.md ybapat open
2026-07-23 GH-50619 [Python][Parquet] Expose size statistics level in the Parquet writer abaybek open
2026-07-22 GH-43838: [Python][C++] Preserve nested NullType metadata in array views dartkron open
2026-07-21 GH-50508: [C++] Support scalar values in AppendScalars Moemenmohamed24 closed
2026-07-20 MINOR: [CI] Bump actions/setup-python from 6 to 7 dependabot[bot] closed
2026-07-20 GH-50560: [C++][FlightRPC][ODBC] Fix SQLDescribeCol column_size/decimal_digits width vikrantpuppala closed
2026-07-20 GH-50548: [C++][Parquet] PERF: Avoid O(n) level range validation in LevelDecoder::Decode parthpathak1201 open
2026-07-19 GH-50515: [C++][Compute] Respect parent validity bitmap when casting nested structs with non-nullable fields aaron-seq open
2026-07-18 GH-49384: [Python] Respect copy=True in ChunkedArray.__array__ jingyi-zhao-01 closed
2026-07-17 GH-44183: [C++] Support run-end encoded struct, list (view), large list (view) and map values BenMagyar closed
2026-07-16 GH-50527: [C++] Remove ARROW_SSE4_2_FLAG for x86 MSVC loctormor open
2026-07-16 GH-50603: [R] remove assertthat dependency + improve error messages olivroy closed
2026-07-15 GH-50512: [C++][Compute] Support float16 in hash kernels (dictionary_encode, unique, value_counts) fornwall closed
2026-07-13 GH-37004: [C++][Python] Fix dropped child data when viewing/casting e… connorsimms closed
2026-07-13 GH-35815: [C++][Compute] Support dictionary inputs in UTF-8 trim LarryHu0217 open
2026-07-12 GH-50481: [C++] Fix CSV reader mis-parsing rows with an embedded NUL byte HannaWeissberg closed
2026-07-12 GH-50308: [C++][IPC] Add input size validation to SparseCSFIndex::Make connorsimms open
2026-07-11 GH-46853: [Python][Docs] Document preserving leading zeros in CSV kalyanamdewri closed
2026-07-11 GH-37476: [C++][Python] Preserve unsigned dictionary index types when building from values mkzung closed
2026-07-09 GH-50449: [C++] Invalid version script argument supplied to MSVC linker johnwparent open
2026-07-07 GH-50282: [C++][FlightRPC] Refactor GRPC server and transport classes Alex-PLACET open
2026-07-06 MINOR: [Python][Docs] Remove reference to removed pyarrow.HdfsFile ritsth closed
2026-07-06 MINOR: [CI] Bump docker/login-action from 4.2.0 to 4.4.0 dependabot[bot] closed
2026-07-06 GH-50665: [Python] Assert s3fs selector result count anxkhn open
2026-07-06 GH-50380: [C++][Gandiva] fix out-of-bounds read in byte_substr past end Arawoof06 closed
2026-07-05 GH-50531: [Python][Packaging] Set macOS deployment target before building wheel platform tag anxkhn closed
2026-07-05 GH-50351: [C++] Fix KeyValueMetadata::DeleteMany crash with duplicate… AdvancedUno open
2026-07-05 GH-50371: [C++][Gandiva] Fold common subexpressions before code generation likun666661 open
2026-07-05 GH-30894: [C++][Python] Fix Table::Slice returning incorrect length f… AdvancedUno open
2026-07-04 GH-50530: [Python] Assert assume_timezone results at input precision anxkhn open
2026-07-04 GH-50251: [C++] Add GetSpan to ArrayData dkp116 closed
2026-07-03 GH-50341: [C++] Add AGENTS.md to C++ dir AdvancedUno closed
2026-07-03 GH-50355: [C++][Gandiva] fix out-of-bounds read in utf8_length_ignore_invalid Arawoof06 closed
2026-07-03 GH-50351: [C++] Fix KeyValueMetadata::DeleteMany crash with duplicate indices AdvancedUno closed
2026-07-03 GH-50351: [C++] Fix KeyValueMetadata::DeleteMany crash with duplicate indices AdvancedUno closed
2026-07-03 GH-30800: [Python][Docs] Document partition fields with explicit dataset schemas kalyanamdewri closed
Good First Issues by Component
Good First Issues
57 issues across 7 components
Component Issues
C++ 21
Python 16
R 8
Documentation 6
Parquet 3
MATLAB 2
Benchmarking 1
Needs Champion
Needs Champion
161 items - sorted by age (newest first)
Title Type Component Created Age (days)
[R] col_types ignored when convert_options specified Issue R 2025-11-16 320
[C++] Replace Google Logging Library Issue C++ 2025-09-01 396
[R] Mixed-type list columns fail with unintuitive error message Issue R 2025-08-27 401
[C++] DictionaryBuilder::InsertMemoValues should not deduplicate values Issue C++ 2025-07-21 438
[Python][C++] Update type definition of npy_traits for Float16 to arrow::util::Float16 instead of uint16_t Issue C++, Python 2025-06-04 485
[CI][Crossbow][Dev] Continue generating nightlies dashboard for CI: Extra scheduled runs Issue Continuous Integration, Developer Tools 2025-06-02 487
[C++][Parquet] Make error reporting more detailed Issue Parquet, C++ 2025-05-27 493
[C++][CUDA] Implement GPUDirect data loading with IPC Issue C++, GPU 2025-05-19 501
Consider adding CITATION.cff for citation details Issue Other 2025-05-16 504
[C++] Review arrow/json headers for internal APIs Issue C++ 2025-05-15 505
[C++] Review arrow/csv headers for internal APIs Issue C++ 2025-05-15 505
[C++][Parquet] Review headers for internal APIs Issue Parquet, C++ 2025-05-15 505
[FlightSQL][Docs] Document current state of FlightSQL support Issue FlightRPC, Documentation 2025-05-07 513
[Parquet][C++] Logical types with sort order UNKNOWN are missing null_count statistics Issue Parquet, C++ 2025-04-22 528
[Python] Support pyarrow.Table.cast with CastOptions Issue Python 2025-04-14 536
[Python][C++] Flexible handling of conflicts during JSON type inference Issue C++, Python, Other 2025-04-07 543
[Python] Expose testing data generation utility Issue Python 2025-04-07 543
[C++][Docs] C++ documentation for constructors is missing Issue Documentation 2025-03-19 562
[C++] Drop support for C++/CLI Issue C++ 2025-03-16 565
[C++] Statistics Schema Implementation Issue C++, Python, Documentation 2025-03-15 566
[C++][Compute] Add FunctionOptions::Validate Issue C++ 2025-03-13 568
[R] Don’t construct arrow_binary class vector in favor of blob::blob Issue R 2025-03-08 573
[Release][Ruby] Build .gem files as binary artifacts Issue Ruby, Release 2025-02-17 592
[R] creating arrow supported expressions Issue R 2025-02-05 604
[Ruby] Improve JRuby Support Issue Ruby 2025-01-21 619
[R] arrow R package: multiple replacement disclaimers for str_replace_all Issue R 2025-01-20 620
[Parquet][C++] PageIndex is useless with current API Issue Parquet, C++ 2025-01-16 624
[C++][Python] Implement pc.equal for List arguments Issue C++, Python 2025-01-04 636
[R] Support translations of simple data.table functions Issue R 2024-12-23 648
[Docs] Clean up LICENSE and NOTICE files Issue Documentation 2024-11-28 673
[R] Provide helpful hints for NotImplemented kernel errors Issue R 2024-11-15 686
[C++][Python] Potential improvements around supply chain security Issue C++, Python 2024-11-09 692
[Python] Efficient way to iterate over groups Issue Python 2024-11-07 694
[R] Add Cumsum and duplicated bindings to datasets in R Issue R 2024-11-07 694
[CI][Packaging][Python] Enable BuildKit for building wheel on Windows Issue Python, Continuous Integration, Packaging 2024-11-07 694
[Dev][Archery] Use --arrow-ref instead of --arrow-sha in archery crossbow submit Issue Archery, Developer Tools 2024-10-31 701
[Format][Docs] Describe C device interface on C data interface and C stream interface docs pages Issue Documentation, Format 2024-10-26 706
Misleading error message when casting Issue Python 2024-10-25 707
[CI][C++] Use a separated Docker image for Emscripten Issue C++, Continuous Integration 2024-10-18 714
[CI][C++] Add clang-cl job Issue C++ 2024-10-11 721
[GLib] Add a sub Buffer class for GBytes based buffer Issue GLib 2024-10-09 723
[C++] Binary View Compute Kernels Issue C++ 2024-10-08 724
[R] please write unregister_scalar_function and/or make registration local/temporary Issue R 2024-10-04 728
[Python] Allow PyCapsule Interface in pyarrow.scalar constructor? Issue Python 2024-09-25 737
[R] Support integer date and time classes from data.table Issue R 2024-09-19 743
[C++][Parquet] Add support for arrow::ArrayStatistics Issue Parquet, C++ 2024-08-04 789
[R] Subtracting X days from a given date in ymd format Issue R 2024-08-01 792
[Python] Move tests that are explicitly about conversion to/from numpy on test_array.py to a separate file Issue Python 2024-08-01 792
[R] Implement anonymous functions in calls to dplyr::across Issue R 2024-07-10 814
[CI][Dev] Add shell script formatter Issue Continuous Integration, Developer Tools 2024-06-28 826
[C++] Add support for system mimalloc Issue C++ 2024-06-19 835
[Python] Get size of IPC File ahead of time Issue Python 2024-06-07 847
[Python] Conversion to/from numpy 2.0+ new StringDType Issue Python 2024-06-06 848
[Docs][Format] Move IPC format spec back into a separate page Issue Documentation, Format 2024-05-15 870
[C++][Parquet] Predicate pushdown through arrow::dataset::ScanBuilder::Filter() not available on list fields Issue Parquet, C++ 2024-05-14 871
[R] Unable to disable url-encoding Issue R 2024-05-10 875
[Python] Pyarrow fs incorrectly resolves S3 URIs with white space as a local path Issue Python 2024-04-24 891
[CI][Archery] Archery linking should also check for undefined symbols Windows Issue Archery 2024-04-03 912
[CI][Archery] Archery linking should also check for undefined symbols macOS Issue Archery 2024-04-03 912
[CI][Archery] Archery linking should also check for undefined symbols Linux Issue Archery 2024-04-03 912
[Ruby] Improve Ruby’s GC integration Issue Ruby 2024-03-29 917
[Python] Allow pyarrow import to fail without triggering Py_FatalError Issue Python 2024-03-27 919
[Parquet] Make default fallback encoding choice smarter Issue Parquet, C++ 2024-03-18 928
[Python][Docs] Max batch size for Dataset Issue Python, Documentation 2024-03-15 931
[C++] Update vendored FlatBuffers to 24 Issue C++ 2024-03-14 932
[Python] Provide a way to close a NativeFile without writing the contents Issue Python 2024-03-13 933
[C++] String manipulation on a dictionary column Issue C++ 2024-03-08 938
[Python] Consider splitting _lib module into several parts Issue Python 2024-02-20 955
[Docs] Add a doc section for tensor arrays Issue Documentation 2024-02-08 967
[Python] Implement unification of null dictionaries Issue Python 2024-02-02 973
[R] Export functions for low-level pointer operations Issue R 2024-01-25 981
[C++][Python] Floordiv compute kernel Issue C++, Python 2023-12-29 1008
[Python] Add timezone information when printing TimestampArray Issue R, Python 2023-12-20 1017
[Python] Clean up ExtensionType.__reduce__ Issue Python 2023-12-06 1031
[C++][Parquet] Parquet: support exact in Page/Row-Group level Statistics Issue Parquet, C++ 2023-11-23 1044
[R] Write metadata to parquet file as argument to write_parquet() Issue R 2023-11-19 1048
[R] preserve hive partitions when opening along a path / path vector Issue R, C++, Python 2023-11-15 1052
[Python] Support serialization of Arrow files on disk without the identifier “Feather” Issue Python 2023-10-30 1068
[Website] Create subsidiary logos for Arrow subprojects Issue Website 2023-10-26 1072
[R] Inconsistent naming Issue R 2023-10-25 1073
[Integration] Test non-zero offsets in C Data Interface Issue Integration 2023-10-19 1079
[R][Docs] Add section on debugging S3 in the R developer docs Issue R, Documentation 2023-10-14 1084
[R] open_dataset() behavior with incorrectly quoted input data Issue R 2023-09-27 1101
[C++] Implement REE support in ArrayFromJSONString Issue C++ 2023-08-23 1136
[R] Error passing data to/from DuckDB - “NotImplemented: Call to R (SafeRecordBatchReader::ReadNext()) from a non-R thread from an unsupported context” Issue R 2023-08-22 1137
GH-36831: [C++] DictionaryArray support for MinMax Function PR C++ 2023-08-10 1149
[C++] sum doesn’t check for overflow Issue C++ 2023-08-09 1150
Missing kernels for ordering with struct types Issue Python 2023-08-09 1150
[Python] Convert multidimensional arrays into FixedShapeTensorArrays automatically in pyarrow.array Issue Python 2023-05-17 1234
[C++][Parquet] Process parquet rowgroups without Arrow conversion Issue Parquet, C++, Python 2023-05-17 1234
[R] Error in rawToChar(out) : long vectors not supported yet Issue R 2023-05-01 1250
[C++] join with numeric columns has poor performance Issue R, C++ 2023-04-25 1256
[C++] Why is arrow mmap marked MAP_PRIVATE (during read)? Issue C++ 2023-04-25 1256
[Python] Bindings for FixedShapeTensorType.FromTensor/ToTensor and FixedShapeTensorArray.strides Issue Python 2023-04-12 1269
[Python][Docs] Update/rearrange Data Types section and add FixedShapeTensorType Issue Python, Documentation 2023-04-12 1269
[R] Add an argument to open_csv_dataset() to repair duplicated column names or ignore them? Issue R 2023-04-07 1274
[Python] unexpected URL encoded path (white spaces) when uploading to S3 Issue Python 2023-04-05 1276
[Format][FlightRPC] Transfer FlightData in pieces Issue FlightRPC, Format 2023-03-07 1305
[R] Named lists cannot be serialized to a map column Issue R 2023-03-02 1310
[Dev][C++] Don’t use GitHub archive files with checksums Issue C++, Developer Tools 2023-02-10 1330
[C++] Create the first binary aggregate function kernel to serve as an example for other implementations Issue C++ 2023-01-30 1341
[R] writing/reading a data.frame with column class ‘list’ changes column class Issue R 2023-01-19 1352
[C++][Python] Support parsing a StringArray full of JSON to a Table Issue C++, Python 2023-01-13 1358
[R] feather round-trip support for named vectors in list columns Issue R 2022-12-19 1383
[Python] test_get_include failing in conda builds on unix Issue Python, Continuous Integration 2022-12-18 1384
[Dev] Comment bot embeds closes comment on code block Issue Developer Tools 2022-12-15 1387
[R] Filter operations not shown when called before summarise Issue R 2022-11-25 1407
[C++] Decide on duplicate column handling in scanner, add more tests Issue C++ 2022-11-22 1410
[C++] Add a “list_contains” kernel Issue C++ 2022-10-19 1444
[C++][Python] Allow an ExtensionType to register or implement custom casts Issue C++, Python 2022-09-29 1464
[R] Update make_date, make_datetime, ISOdate and ISOdatetime to use tz Issue R 2022-07-12 1543
“Edit this page” on docstring generated docs gives 404 Issue Documentation 2022-06-10 1575
[R] printing data in Table/RecordBatch print method Issue R, Python 2022-06-07 1578
[R] Factor levels cannot contain NA Issue R 2022-06-07 1578
[C++] ParquetFileFragment caches parquet file metadata and there is no way to disable this Issue C++ 2022-05-04 1612
[C++] Support hash-join on larger than memory datasets Issue C++ 2022-04-28 1618
[Archery] Add documentation for local development in archery/crossbow Issue Developer Tools 2022-04-12 1634
[Python] Version=7.0.0 introduces bug when filtering by empty set during load Issue Python 2022-03-28 1649
[C++] strptime rolls-over dates not in range for current month Issue R, C++, Python 2022-03-16 1661
[R] Update as.Date() to support direct casting from double/float Issue R 2022-02-28 1677
[R] Empty JSON object parsed as corrupt data frame Issue R 2022-02-28 1677
[R] Arrow/Parquet can’t open encrypted parquet files Issue R 2022-01-26 1710
[C++][Python] Slicing a table with no columns returns a table with incorrect length. Issue C++, Python 2022-01-22 1714
[C++] Name the threads in thread pools Issue C++ 2022-01-07 1729
[Python] Reading Hive-style partitioned parquet files from GCS Issue Python 2021-12-01 1766
[R] Implement bindings for stringr’s combining strings functions Issue R 2021-11-24 1773
[C++][R]Opening a multi-file dataset and writing a re-partitioned version of it fails Issue R, C++ 2021-11-17 1780
[C++][Dataset] Change scanner readahead limits to be based on bytes instead of number of batches Issue C++ 2021-11-09 1788
[C++][Dataset] Devise a mechanism to limit the total “system ram” (process + cache) used by dataset writes Issue C++ 2021-11-08 1789
[Docs] [Benchmarking] Add conbench to the benchmarking docs Issue Documentation, Benchmarking 2021-11-03 1794
[C++][R] Inconsistent application of type in Datasets via the schema Issue R, C++ 2021-10-14 1814
[R] Selecting colums while reading Parquet file with nested types can give wrong column Issue R 2021-10-11 1817
[R] Support inequality joins Issue R 2021-10-08 1820
[Python] Support other interval types Issue Python 2021-10-07 1821
[R] Empty character attributes not stored Issue R 2021-08-09 1880
[C++][Compute] Add quotient and modulo kernels Issue C++ 2021-05-12 1969
[R] Throw helpful errors on bad object types in dplyr expressions Issue R 2021-03-25 2017
[Python][Dataset] The first table schema becomes a common schema for the full Dataset Issue Python, Documentation 2021-03-24 2018
[R] Support for Tensor class Issue R 2021-02-15 2055
[C++][Dataset] Provide more robust handling of comparison guarantees in the presence of implicit casts Issue C++ 2021-02-08 2062
[R] ChunkedArray$create assumes all chunks are the same type Issue R 2021-01-11 2090
[Ruby] Table#initialize examples are out of date Issue Ruby, Documentation 2020-11-14 2148
[C++][Python] .take silently overflow on list array (when casting to large_list is needed) Issue C++, Python 2020-11-04 2158
[Python] Schema Evolution - Add new Field Issue Python 2020-09-08 2215
[C++][Python] pa.array raises for mixed scalar types (float16 + int) Issue Python 2020-08-21 2233
[Python] Array.__str__ shows misleading output for timestamp types with time zone set Issue C++, Python 2020-07-19 2266
[C++/Python] Kernel for SetItem(IntegerArray, values) (“replace_with_indices”) Issue C++, Python 2020-07-13 2272
[Python] supporting pandas sparse series in pyarrow Issue Python 2020-05-03 2343
[Python] Create tools to enable optional components (like Gandiva, Flight) to be built and deployed as separate Python packages Issue Python, Packaging 2020-04-19 2357
[Python][Dataset] Detect and use _metadata file in a list of file paths Issue Python 2020-04-14 2362
[C++][Dataset] Handling of duplicate columns in Dataset factory and scanning Issue C++ 2020-03-25 2382
[Crossbow] Eliminate libgit2 dependency Issue Developer Tools 2020-03-12 2395
[C++][Python] ArrowIOError: Invalid Parquet file size is 0 bytes on reading from S3 Issue C++, Python 2020-02-16 2420
[Python] consistently handle conversion of all-NaN arrays across types Issue Python 2019-09-12 2577
[Python] Array equals returns incorrectly if NaNs are in arrays Issue Python 2019-07-25 2626
[C++] [Documentation] add discussion of Union.typeIds to Layout.rst Issue C++, Documentation 2019-07-12 2639
[C++][Python] Support ExtensionType arrays in more kernels Issue C++ 2019-07-09 2642
[Doc] Better document the Tensor classes in the prose documentation Issue C++, Python, Documentation 2019-07-04 2647
[GLib] Add support for arrow::DictionaryBuilder Issue GLib 2019-03-16 2757
[Python] Add documentation section for integrations with PyTorch, TensorFlow Issue Python, Documentation 2018-02-01 3165
[Format] Add metadata for single and double precision complex numbers Issue Format 2017-03-16 3487
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