Issues

• Support custom vectorized Java UDFs that operate on Arrow vectors

  area:udfenhancementrequires-triage
  apache/datafusion-comet#6694 · Filter by author andygrove opened on Oct 5, 2026
  1

  

• Plan Iceberg WriteDelta in the split write path and keep it on the JVM DeltaWriter

  requires-triage
  apache/datafusion-comet#6692 · Filter by author unikdahal opened on Oct 5, 2026
  1

  

• Cached AQE queries fail after transition reversion on Spark 4.0+

  bugrequires-triage
  apache/datafusion-comet#6687 · Filter by author sam-1112 opened on Oct 5, 2026

• Native shuffle fails with "no more field nodes" on a struct column when it reads converted Spark rows directly

  area:shufflebugpriority:mediumrequires-triage
  apache/datafusion-comet#6685 · Filter by author andygrove opened on Oct 5, 2026

• TakeOrderedAndProject fails with "Subquery not found" when the sort order has a scalar subquery and the input has several partitions

  bugrequires-triage
  apache/datafusion-comet#6676 · Filter by author andygrove opened on Oct 5, 2026

• Codegen dispatcher fails with "Subquery has not finished" when a scalar subquery is inside the dispatched expression

  area:udfbugrequires-triage
  apache/datafusion-comet#6674 · Filter by author andygrove opened on Oct 5, 2026

• Kept sort-merge join reads unsorted input after replaceSortMergeJoin rewrites the join below it

  requires-triage
  apache/datafusion-comet#6673 · Filter by author dwsmith1983 opened on Oct 5, 2026

• Native Iceberg writes: write row lineage for copy-on-write DML and compaction on format-version 3 tables

  area:Icebergarea:writerenhancementrequires-triage
  apache/datafusion-comet#6669 · Filter by author andygrove opened on Oct 5, 2026

• Native Iceberg writes: support format-version 3 tables

  area:Icebergarea:writerenhancementrequires-triage
  apache/datafusion-comet#6668 · Filter by author andygrove opened on Oct 5, 2026

• Spark 3.4: global aggregate over a single-split Iceberg scan returns no row when DPP prunes the split

  area:Icebergbugrequires-triage
  apache/datafusion-comet#6667 · Filter by author andygrove opened on Oct 5, 2026

• Bug triage results: 2026-10-05

  requires-triage
  apache/datafusion-comet#6665 · Filter by author andygrove opened on Oct 5, 2026

• ANSI integral SUM overflow reports "integer overflow" without Spark's try_add suggestion

  area:aggregationbugpriority:medium
  apache/datafusion-comet#6661 · Filter by author andygrove opened on Oct 5, 2026

• perf: explore reducing copies in native Celeborn shuffle writes

  area:shuffleenhancement
  apache/datafusion-comet#6654 · Filter by author unikdahal opened on Oct 5, 2026
  2

• Flaky test: CometIcebergWriteActionSuite "a failed write job deletes the data files of tasks that completed"

  area:Icebergarea:writerbugpriority:lowtest
  apache/datafusion-comet#6643 · Filter by author andygrove opened on Oct 4, 2026
  

• [EPIC] Adaptive runtime pruning for native Iceberg scans

  area:scanenhancement
  apache/datafusion-comet#6641 · Filter by author unikdahal opened on Oct 4, 2026
  1

  

• test: move expression-level codegen dispatcher tests to Comet SQL tests

  area:expressionsenhancementtest
  apache/datafusion-comet#6637 · Filter by author andygrove opened on Oct 4, 2026

• test: move CometFloatSemanticsSuite's matching cases to Comet SQL tests

  area:expressionsenhancementtest
  apache/datafusion-comet#6636 · Filter by author andygrove opened on Oct 4, 2026

• test: move conditional, JSON, CSV, Variant and other expression coverage to Comet SQL tests

  area:expressionsenhancementtest
  apache/datafusion-comet#6635 · Filter by author andygrove opened on Oct 4, 2026

• test: move hash and bitwise expression coverage from Scala suites to Comet SQL tests

  area:expressionsenhancementtest
  apache/datafusion-comet#6634 · Filter by author andygrove opened on Oct 4, 2026
  1

  

• test: move the Spark 4 collation suites to Comet SQL tests

  area:expressionsenhancementtest
  apache/datafusion-comet#6633 · Filter by author andygrove opened on Oct 4, 2026

• test: move window function coverage from CometWindowExecSuite to Comet SQL tests

  area:expressionsenhancementtest
  apache/datafusion-comet#6632 · Filter by author andygrove opened on Oct 4, 2026

• test: move aggregate function coverage from CometAggregateSuite to Comet SQL tests

  area:aggregationenhancementtest
  apache/datafusion-comet#6631 · Filter by author andygrove opened on Oct 4, 2026

• test: move explode/posexplode coverage from CometGenerateExecSuite to Comet SQL tests

  area:expressionsenhancementtest
  apache/datafusion-comet#6630 · Filter by author andygrove opened on Oct 4, 2026

• test: move map and struct expression coverage from Scala suites to Comet SQL tests

  area:expressionsenhancementtest
  apache/datafusion-comet#6629 · Filter by author andygrove opened on Oct 4, 2026

• test: move array expression coverage from Scala suites to Comet SQL tests

  area:expressionsenhancementtest
  apache/datafusion-comet#6628 · Filter by author andygrove opened on Oct 4, 2026