Issues

• [C++] Casting a string to a decimal type wraps values wider than the storage integer instead of erroring

  apache/arrow#55606 · Filter by author pedrobtz opened on Nov 14, 2026

• [R] Scanning a dataset whose parts have R extension types with different metadata aborts the R process

  apache/arrow#55605 · Filter by author pedrobtz opened on Nov 14, 2026

• [C++][FlightRPC][ODBC] Add custom known field on ODBC Windows DSN window doesn't work properly

  Component: C++Component: FlightRPCType: bug
  apache/arrow#55603 · Filter by author alinaliBQ opened on Nov 13, 2026
  

• [C++][Parquet] Align Parquet geometry/geography CRS handling with arrow-rs and Parquet spec

  Component: C++Component: ParquetType: bug
  apache/arrow#55598 · Filter by author paleolimbot opened on Nov 13, 2026
  

• [Python] Use docstring-adder to add runtime docstrings to type stubs

  Component: PythonType: enhancement
  apache/arrow#55596 · Filter by author rok opened on Nov 13, 2026
  

• [Dev] Add an optional "Are you willing to submit a PR?" checkbox to issue templates

  Component: Developer ToolsType: enhancement
  apache/arrow#55595 · Filter by author basantjamwal opened on Nov 13, 2026

• [C++] Consider separating bundled AWS SDK libraries from Arrow dependencies

  Component: C++Type: enhancement
  apache/arrow#55591 · Filter by author tadeja opened on Nov 13, 2026

• [Python][Annotations] Add type annotations for scalars

  Type: enhancement
  apache/arrow#55590 · Filter by author rok opened on Nov 13, 2026
  

• [CI] C++ / AMD64 Ubuntu 24.04 C++ ASAN UBSAN fails starting azurite due to old Node

  Component: Continuous IntegrationType: bug
  apache/arrow#55587 · Filter by author raulcd opened on Nov 13, 2026
  1

  

• Use pyodide venv for testing PyArrow pyemscripten builds

  apache/arrow#55586 · Filter by author agriyakhetarpal opened on Nov 13, 2026
  

• [C++] Export arrow_bundled_dependencies by install(TARGETS) instead of creating it in ArrowConfig.cmake

  Component: C++Type: enhancement
  apache/arrow#55583 · Filter by author kou opened on Nov 13, 2026
  1

• [C++][Parquet] Fall back to PLAIN when ALP is larger, and simplify ALP preset sampling

  Component: C++Type: enhancement
  apache/arrow#55579 · Filter by author prtkgaur opened on Nov 13, 2026
  

• [R] read_parquet(col_select =) silently returns the wrong columns when the file has nested (list) columns

  Component: RStatus: confirmedType: bug
  apache/arrow#55578 · Filter by author stufield opened on Nov 12, 2026
  3

  

• [C++][Parquet] Fast path for reading fixed-size lists by detecting constant list length from encoded levels

  Component: C++Component: ParquetType: enhancement
  apache/arrow#55576 · Filter by author MashrafeeAryan opened on Nov 12, 2026
  

• [Python][C++][Substrait] DecodeBasicAggregate inverts POPULATION (ddof=1) and SAMPLE (ddof=0) for variance and std_dev

  Component: C++Component: Python
  apache/arrow#55575 · Filter by author xgbtxy opened on Nov 12, 2026

• [C++][RISC-V] Add RVV128/RVV256 SIMD kernels for bit-packing unpack

  Component: C++Type: enhancement
  apache/arrow#55573 · Filter by author zhanchangbao-sanechips opened on Nov 12, 2026

• [C++][Parquet] Honor configured column encoding on dictionary fallback

  Component: C++Component: Parquet
  apache/arrow#55571 · Filter by author ryanvickr opened on Nov 12, 2026
  

• [C++] utf8_slice_codeunits returns wrong results with extreme start or step

  Component: C++
  apache/arrow#55509 · Filter by author Dricmoy opened on Nov 11, 2026

• [C++][Gandiva] Crash on Mac OS with LLVM optimizations disabled

  Component: C++Component: GandivaType: bug
  apache/arrow#55505 · Filter by author lriggs opened on Nov 11, 2026
  

• [C++] Unifying float16 dictionaries replaces every value with its bit pattern read as a number (combine_chunks, concat_arrays, unify_dictionaries, Feather)

  Component: C++Type: bug
  apache/arrow#55503 · Filter by author hanke580 opened on Nov 11, 2026
  3

  

• [R]: Is zlib actually enabled by default?

  Component: RType: bug
  apache/arrow#55501 · Filter by author jonkeane opened on Nov 11, 2026

• [Python] Remove the have_signal_refcycle workaround in error.pxi

  Component: Python
  apache/arrow#55500 · Filter by author AlenkaF opened on Nov 11, 2026
  

• [Python] Let array() return a ChunkedArray only when asked

  Component: PythonType: enhancement
  apache/arrow#55499 · Filter by author tadeja opened on Nov 11, 2026

• [C++][JSON] Avoid reusing simdjson values after failed get()

  Component: C++Type: bug
  apache/arrow#55497 · Filter by author wgtmac opened on Nov 11, 2026
  

• [C++][Substrait] ProjectRel conversion aborts on computed output types

  Component: C++Type: bug
  apache/arrow#55493 · Filter by author gvol opened on Nov 11, 2026