Issues

• SortMergeJoin: derive sort options from input ordering, and allow it with a single partition when prefer_hash_join=false

  enhancement
  Feature

  apache/datafusion#26260 · Filter by author bert-beyondloops opened on Oct 13, 2026
  1

• Changelog generator crashes on commits without a linked GitHub author

  apache/datafusion#26259 · Filter by author ASVLCII opened on Oct 13, 2026

• [DISCUSSION] Is DataFusion's implementation growing too complicated? Are AI assisted PRs to blame?

  apache/datafusion#26257 · Filter by author alamb opened on Oct 13, 2026

• Select a null-free sort-merge cursor when the schema rules nulls out

  enhancement
  apache/datafusion#26252 · Filter by author zhuqi-lucas opened on Oct 13, 2026
  

• MIN/MAX fail with an internal error on RunEndEncoded columns

  bug
  Bug

  apache/datafusion#26247 · Filter by author grevend opened on Oct 12, 2026

• array_concat with an untyped NULL argument fails with "does not support type Int64"

  apache/datafusion#26243 · Filter by author RishavTiwari25 opened on Oct 12, 2026

• Prune unused columns from the body of a materialized CTE

  enhancement
  apache/datafusion#26240 · Filter by author adriangb opened on Oct 12, 2026

• Push filters that all references share into the body of a materialized CTE

  enhancement
  apache/datafusion#26239 · Filter by author adriangb opened on Oct 12, 2026

• Make the materialized CTE nodes first-class LogicalPlan variants

  enhancement
  apache/datafusion#26238 · Filter by author adriangb opened on Oct 12, 2026

• Decide automatically when to materialize a CTE

  enhancement
  apache/datafusion#26237 · Filter by author adriangb opened on Oct 12, 2026

• HashJoinExec: declare build-side order for LeftSemi, LeftAnti and LeftMark joins

  enhancement
  apache/datafusion#26235 · Filter by author andygrove opened on Oct 12, 2026

• Wrong results: Correlated subquery confuses same-named columns of two of its relations

  bug
  Bug

  apache/datafusion#26234 · Filter by author thobe opened on Oct 12, 2026

• Release the buffer of a materialized CTE when the last scan finishes

  enhancement
  apache/datafusion#26233 · Filter by author adriangb opened on Oct 12, 2026

• Use byte-bounded spill files for materialized CTEs

  enhancement
  apache/datafusion#26232 · Filter by author adriangb opened on Oct 12, 2026

• Protobuf serialization for materialized CTE plan nodes

  enhancement
  apache/datafusion#26231 · Filter by author adriangb opened on Oct 12, 2026

• Materialized CTE scans report unknown statistics, ordering and partitioning

  enhancement
  apache/datafusion#26230 · Filter by author adriangb opened on Oct 12, 2026

• MaterializedCteExec::reset_state clears its shared buffer in place

  enhancement
  apache/datafusion#26229 · Filter by author adriangb opened on Oct 12, 2026

• HashJoinExec loses build-side input order across batches on the hash map path

  apache/datafusion#26226 · Filter by author dwsmith1983 opened on Oct 12, 2026
  1

  

• [EPIC] Refactor Operators for Maintainability

  apache/datafusion#26225 · Filter by author 2010YOUY01 opened on Oct 12, 2026
  5

  

• sum and avg over sliding window frames return NaN after an infinity leaves the frame

  bug
  Bug

  apache/datafusion#26222 · Filter by author cblp opened on Oct 12, 2026
  1

• Aggregates of x and CAST(x AS ...) in one query fail with "duplicate unqualified field name", even with aliases

  bug
  Bug

  apache/datafusion#26221 · Filter by author cblp opened on Oct 12, 2026

• map[key] fails when the key literal's type differs from the map key type (e.g. MAP(VARCHAR, ...) with m['a'])

  bug
  Bug

  apache/datafusion#26197 · Filter by author Ishaan400 opened on Oct 11, 2026
  1

  

• sum of a decimal returns a wider type than the plan schema declares when the query has a DISTINCT aggregate

  apache/datafusion#26193 · Filter by author adriangb opened on Oct 10, 2026

• DataFrame API: serialize columns to a JSON string column

  enhancement
  Feature

  apache/datafusion#26185 · Filter by author cj-zhukov opened on Oct 10, 2026
  5

  

• Clippy fails with all features enabled

  bug
  Bug

  apache/datafusion#26181 · Filter by author haohuaijin opened on Oct 10, 2026