Issues

• [Variant] Parquet writer omits specification_version on the VARIANT logical type

  apache/arrow-rs#11917 · Filter by author raghuvanshraj opened on Oct 26, 2026

• Speed up reading FIXED_LEN_BYTE_ARRAY decimals in the parquet arrow reader

  apache/arrow-rs#11908 · Filter by author yihua opened on Oct 25, 2026
  2

• data: MutableArrayData::try_with_capacities should avoid allocating a null bitmap when possible

  bug
  Bug

  apache/arrow-rs#11902 · Filter by author Jefffrey opened on Oct 25, 2026

• RowConverter encodes every dictionary value for each batch, not just the values its rows reference

  enhancement
  apache/arrow-rs#11901 · Filter by author jayzhan211 opened on Oct 25, 2026

• replace more mutablebuffer callsites with fallible methods

  enhancement
  Feature

  apache/arrow-rs#11900 · Filter by author Jefffrey opened on Oct 25, 2026
  3

  

• Specialize BatchCoalescer for ListArray and LargeListArray

  apache/arrow-rs#11898 · Filter by author Rich-T-kid opened on Oct 25, 2026

• time64us_to_time and time64ns_to_time wrap values outside one day to a valid time

  apache/arrow-rs#11893 · Filter by author mbutrovich opened on Oct 24, 2026

• Parquet: Allow disabling Bloom filter folding for parquet-java compatibility

  apache/arrow-rs#11891 · Filter by author NikitaMatskevich opened on Oct 24, 2026

• Release process: should we have both sha256 and sha512?

  development-process
  apache/arrow-rs#11890 · Filter by author Jefffrey opened on Oct 24, 2026

• Release arrow-rs / parquet Major version 62.0.0 (March 2027)

  apache/arrow-rs#11888 · Filter by author Jefffrey opened on Oct 24, 2026
  

• Release arrow-rs / parquet Minor version 61.2.0 (February 2027)

  apache/arrow-rs#11887 · Filter by author Jefffrey opened on Oct 24, 2026
  

• Release arrow-rs / parquet Minor version 61.1.0 (January 2027)

  apache/arrow-rs#11886 · Filter by author Jefffrey opened on Oct 24, 2026
  

• concat of dictionary slices does work proportional to each input's whole dictionary, not its rows

  enhancement
  apache/arrow-rs#11885 · Filter by author jayzhan211 opened on Oct 24, 2026
  1

  

• Are we still under MIT for chronoutil code?

  apache/arrow-rs#11884 · Filter by author Jefffrey opened on Oct 24, 2026

• Parquet: map the FILE logical type to an Arrow extension type

  apache/arrow-rs#11876 · Filter by author dejankrak-db opened on Oct 23, 2026

• BatchCoalescer should flush before exceeding 32-bit offset limits

  apache/arrow-rs#11869 · Filter by author pingzh opened on Oct 23, 2026
  1

  

• Add a way to notify about failing Miri jobs

  apache/arrow-rs#11860 · Filter by author sdf-jkl opened on Oct 23, 2026
  

• ipc: slicing buffer should not panic on invalid slice

  bug
  Bug

  apache/arrow-rs#11857 · Filter by author Jefffrey opened on Oct 23, 2026
  1

• ipc: slicing union buffer should validate length

  bug
  Bug

  apache/arrow-rs#11856 · Filter by author Jefffrey opened on Oct 23, 2026

• data: validating fixedsizelist nulls doesnt need to always expand

  bug
  Bug

  apache/arrow-rs#11855 · Filter by author Jefffrey opened on Oct 23, 2026

• cast Date64 to Date32 truncates toward zero, shifting pre-1970 dates by one day

  apache/arrow-rs#11853 · Filter by author Shahzeb-DataEngineer opened on Oct 23, 2026

• StructArray::try_new_with_length can panic given null array with max length

  bug
  Bug

  apache/arrow-rs#11848 · Filter by author Jefffrey opened on Oct 23, 2026

• filter kernel: native implementations for List, LargeList, FixedSizeList and Map

  apache/arrow-rs#11839 · Filter by author mzabaluev opened on Oct 23, 2026

• Parquet Arrow writer does not consistently validate schemas and column counts

  bug
  Bug

  apache/arrow-rs#11837 · Filter by author HippoBaro opened on Oct 22, 2026

• MutableArrayData::try_extend_nulls fails on a struct or fixed-size list whose union child has no nullable field

  apache/arrow-rs#11836 · Filter by author mbutrovich opened on Oct 22, 2026