Issues

• [C++][Compute] Support decimal32 and decimal64 in more compute kernels

  Component: C++
  apache/arrow#55349 · Filter by author 555aaditya opened on Oct 30, 2026

• [C++][Parquet][Python] Support the proposed FINITE_VECTOR logical type

  Component: C++Component: ParquetComponent: PythonType: enhancement
  apache/arrow#55347 · Filter by author rok opened on Oct 30, 2026
  

• [Dev] Automatically unassign inactive contributors from good first/second issues

  apache/arrow#55344 · Filter by author Reranko05 opened on Oct 30, 2026
  7

  

• [C++][Parquet] A data page without values ends the column chunk, dropping the remaining rows

  Component: C++Component: ParquetType: bug
  apache/arrow#55342 · Filter by author kszucs opened on Oct 30, 2026
  

• [C++] Out-of-range decimal scales read past the powers-of-ten tables

  Component: C++
  apache/arrow#55340 · Filter by author mardgez opened on Oct 30, 2026
  

• [R] %% returns wrong results for decimals and errors for large int64; use the modulo kernel

  Component: RType: bug
  apache/arrow#55334 · Filter by author thisisnic opened on Oct 30, 2026
  2

• [CI][R] Remove clang-22 install from test-r-linux-as-cran

  Component: Continuous IntegrationComponent: R
  apache/arrow#55332 · Filter by author thisisnic opened on Oct 30, 2026
  

• [Ruby] Arrow::RecordBatchReader marks only the first source

  Component: RubyType: bug
  apache/arrow#55328 · Filter by author kou opened on Oct 30, 2026
  

• [C++][Python][Dataset][ORC] Dataset scans return nulls when a dotted field name collides with a nested path

  Component: C++Component: Python
  apache/arrow#55326 · Filter by author jiangxt2 opened on Oct 30, 2026
  1

  

• [Parquet][Python][Dataset] Allow attaching a known FileMetaData to a ParquetFileFragment

  Component: ParquetComponent: Python
  apache/arrow#55325 · Filter by author bhavya-sl opened on Oct 30, 2026

• [Python][Parquet] Expose ReaderProperties::footer_read_size in Python

  Component: ParquetComponent: Python
  apache/arrow#55324 · Filter by author bhavya-sl opened on Oct 30, 2026
  1

• [Python] pyarrow can read integers as dates in list but not np.array

  Component: PythonType: bug
  apache/arrow#55315 · Filter by author Kodiologist opened on Oct 29, 2026
  2

• [C++][Parquet] Optimize GreaterThanDynamicFunction for Neon

  Component: C++Component: ParquetType: enhancement
  apache/arrow#55313 · Filter by author mapleFU opened on Oct 29, 2026
  1

  

• [C++][Compute] Make kernel generation more flexible

  Component: C++Type: enhancement
  apache/arrow#55312 · Filter by author pitrou opened on Oct 29, 2026
  

• [C++][Parquet] Minor: optimize level counting in parquet writer

  Component: C++Component: ParquetType: enhancement
  apache/arrow#55307 · Filter by author mapleFU opened on Oct 29, 2026
  

• [C++][Parquet] Avoid unnecessary copies when building data pages

  Component: C++Component: ParquetType: enhancement
  apache/arrow#55305 · Filter by author HuaHuaY opened on Oct 29, 2026
  

• [Python] Converting lists of string_view, binary_view, decimal32, decimal64 or fixed_size_binary to pandas raises NotImplementedError

  Component: Python
  apache/arrow#55298 · Filter by author 555aaditya opened on Oct 28, 2026
  1

  

• [Python] Dataset.head(-1) returns a Table with negative num_rows

  apache/arrow#55295 · Filter by author chrikrah opened on Oct 28, 2026

• [C++][Dataset] Prune Parquet row groups for is_in predicates with large value sets

  Component: C++Type: enhancement
  apache/arrow#55292 · Filter by author rok opened on Oct 27, 2026
  

• [C++][Parquet] Fast path for writing fixed-size lists

  Type: enhancement
  apache/arrow#55287 · Filter by author MashrafeeAryan opened on Oct 27, 2026
  

• [GLib][Ruby] Make underlying calls to FileSystemFromUri() on gs/gcs filesystems work

  Component: GLibComponent: RubyType: enhancement
  apache/arrow#55284 · Filter by author raulcd opened on Oct 27, 2026
  3

• GH-55281: [C++][Gandiva] Release arena memory per row for any function with context

  Component: C++Component: GandivaType: bug
  apache/arrow#55281 · Filter by author dmitry-chirkov-dremio opened on Oct 27, 2026
  2

  

• [C++] Windows compute testing helper exports static API definitions to shared-linked tests

  Component: C++
  apache/arrow#55279 · Filter by author ConnorQi01 opened on Oct 27, 2026
  

• [C++][Gandiva] Gandiva crashes when casting a large batch from int32 to decimal with JIT optimization disabled

  Component: C++Component: GandivaType: bug
  apache/arrow#55277 · Filter by author dmitry-chirkov-dremio opened on Oct 27, 2026
  

• [C++][Parquet] Default to V2 data pages

  Component: C++Component: Parquetgood-second-issueType: enhancement
  apache/arrow#55272 · Filter by author pitrou opened on Oct 26, 2026
  5