Issues

• Wrong results: pushing a volatile filter below GROUP BY changes the count

  apache/datafusion#27074 · Filter by author Phoenix500526 opened on Nov 4, 2026
  1

  

• SortExec panics in sort_run on FFI-imported sliced batches: assertion reservation.size() + shared.size() >= reserved_bytes

  bugregression
  apache/datafusion#27069 · Filter by author andygrove opened on Nov 4, 2026

• Parquet scan returns unvalidated Utf8 for top-level binary columns read as strings

  bug
  apache/datafusion#27068 · Filter by author andygrove opened on Nov 4, 2026
  1

• Parquet scan returns unvalidated Utf8 for nested BINARY fields read as strings (regression from #25193)

  bugregression
  apache/datafusion#27065 · Filter by author andygrove opened on Nov 3, 2026
  

• Substrait consumer doesn't recognise shift_left / shift_right from functions_arithmetic.yaml

  bug
  Bug

  apache/datafusion#27059 · Filter by author AlexanderNenninger opened on Nov 3, 2026

• Substrait producer: GROUP BY k, k gives a plan whose projection reads the aggregate's columns shifted by one

  bug
  Bug

  apache/datafusion#27058 · Filter by author AlexanderNenninger opened on Nov 3, 2026

• Support large input batches in null-aware sort-merge joins under memory limits

  enhancement
  Feature

  apache/datafusion#27054 · Filter by author TinyMurky opened on Nov 3, 2026

• RepartitionExec with preserve_order=true does not show that it sort-merges its inputs

  enhancement
  apache/datafusion#27053 · Filter by author zhuqi-lucas opened on Nov 3, 2026
  

• ProjectionExprs::project_statistics computes approximate Statistics::total_byte_size ignoring column stats

  bug
  Bug

  apache/datafusion#27050 · Filter by author joseph-isaacs opened on Nov 3, 2026

• first_value/last_value ORDER BY a time zone aware timestamp gets slower with more partitions (Arc<str> refcount contention in FirstLastGroupsAccumulator)

  apache/datafusion#27046 · Filter by author akupchinskiy opened on Nov 3, 2026

• ParquetSink keeps every written file's ParquetMetaData in memory until the sink finishes

  bug
  apache/datafusion#27026 · Filter by author xudong963 opened on Nov 3, 2026
  

• REGRESSION: UNION: DataFrame::schema() reports the first input's type, but execution returns the coerced type

  bugregression
  apache/datafusion#27023 · Filter by author mikewolfd opened on Nov 2, 2026
  2

• Add Column Match by header flag to datafusion csv

  enhancement
  Feature

  apache/datafusion#27020 · Filter by author wyatt-herkamp opened on Nov 2, 2026

• Prune unused dictionary values before spilling to Arrow IPC

  enhancement
  Feature

  apache/datafusion#27014 · Filter by author brancz opened on Nov 2, 2026

• add udaf_return_field_preserving_arg_metadata

  apache/datafusion#27013 · Filter by author sdf-jkl opened on Nov 2, 2026
  2

• map_entries() panics on a valid map with non-nullable values

  apache/datafusion#27012 · Filter by author sesteves opened on Nov 2, 2026

• variant_get on a shredded Variant column reads the whole column; get_field on the same data as a struct reads one leaf

  apache/datafusion#27007 · Filter by author raghuvanshraj opened on Nov 2, 2026
  1

• proto-common: decoding a malformed scalar, union type or CSV options panics instead of erroring

  apache/datafusion#27004 · Filter by author geoHeil opened on Nov 2, 2026
  6

• SortPreservingMergeExec reads inputs one at a time when their key ranges are disjoint

  apache/datafusion#27003 · Filter by author zhuqi-lucas opened on Nov 2, 2026
  

• simplify_expressions: A * 0 drops the multiplication result type, so a range predicate over it fails to plan

  apache/datafusion#27001 · Filter by author ayushan003 opened on Nov 2, 2026

• physical-plan: decoding an Unnest or Explain node with an unset field panics

  apache/datafusion#26999 · Filter by author geoHeil opened on Nov 1, 2026
  1

• datafusion-proto: decoding an AvroScan node without the avro feature panics

  apache/datafusion#26998 · Filter by author geoHeil opened on Nov 1, 2026

• information_schema.views.defintion contains DDL statement

  bug
  Bug

  apache/datafusion#26997 · Filter by author pepijnve opened on Nov 1, 2026
  2

  

• approx_distinct rejects floats, but accepts containers of them

  bug
  Bug

  apache/datafusion#26985 · Filter by author mkleen opened on Nov 1, 2026
  6

  

• Parquet pruning drops rows for CAST(int AS BOOLEAN) and CAST(int AS BYTEA) predicates

  bug
  apache/datafusion#26981 · Filter by author jayzhan211 opened on Nov 1, 2026