Issues

• Migrate to the new apache/datafusion-spark repository

  enhancementrequires-triage
  apache/datafusion-comet#7619 · Filter by author comphead opened on Nov 14, 2026
  

• make_date can throw on unconsumed rows through PySpark and raw row iterators

  requires-triage
  apache/datafusion-comet#7616 · Filter by author pingzh opened on Nov 13, 2026

• A failed native grow is only logged when the task makes no later try_grow

  requires-triage
  apache/datafusion-comet#7615 · Filter by author JonSnow1807 opened on Nov 13, 2026

• Research using the Rust Allocator API (stabilized in 1.100) for memory-pool accounting

  enhancementrequires-triage
  apache/datafusion-comet#7613 · Filter by author andygrove opened on Nov 13, 2026
  

• Rust tests fail on Rust 1.100: COMET_TEST_UDFS_LIB points at target/debug/build

  requires-triage
  apache/datafusion-comet#7609 · Filter by author dwsmith1983 opened on Nov 13, 2026

• Native MergeRows can panic or produce wrong masks - arrow 59 and_not mishandles sliced arrays

  requires-triage
  apache/datafusion-comet#7596 · Filter by author FreakingMind opened on Nov 10, 2026

• Native shuffle write fails when the local dir path contains .data; failed tasks also leave temp files behind

  requires-triage
  apache/datafusion-comet#7594 · Filter by author rich7420 opened on Nov 10, 2026

• Restore native row-group pruning for FLOAT and DOUBLE range filters in Iceberg scans

  requires-triage
  apache/datafusion-comet#7588 · Filter by author rich7420 opened on Nov 10, 2026

• Speculate string functions such as upper in NullShortCircuit by adding them to is_cheap

  requires-triage
  apache/datafusion-comet#7587 · Filter by author tlfua opened on Nov 10, 2026

• Consolidate the Scala "cannot fail" checks: arrays.cannotThrow and QueryPlanSerde.cannotFail

  requires-triage
  apache/datafusion-comet#7585 · Filter by author tlfua opened on Nov 10, 2026

• lpad/rpad do not use withNullShortCircuit, so ANSI errors are raised on rows Spark skips

  requires-triage
  apache/datafusion-comet#7583 · Filter by author tlfua opened on Nov 9, 2026

• Native string to decimal cast fails on a string with more than 38 digits: NULL or CAST_INVALID_INPUT where Spark returns a value

  requires-triage
  apache/datafusion-comet#7581 · Filter by author snmvaughan opened on Nov 9, 2026

• Native string to decimal cast raises CAST_INVALID_INPUT instead of NUMERIC_VALUE_OUT_OF_RANGE under ANSI when the scale adjustment is more than 38

  requires-triage
  apache/datafusion-comet#7576 · Filter by author snmvaughan opened on Nov 9, 2026

• Bug triage results: 2026-11-09

  requires-triage
  apache/datafusion-comet#7574 · Filter by author andygrove opened on Nov 9, 2026
  1

• Support Delta InterleaveBits for one or two INT inputs

  area:expressionsenhancement
  apache/datafusion-comet#7573 · Filter by author ErikBPF opened on Nov 8, 2026
  4

• Support Delta BitmapAggregator with Portable encoding

  area:aggregationenhancement
  apache/datafusion-comet#7572 · Filter by author ErikBPF opened on Nov 8, 2026

• Support Delta DeletedRecordCountsHistogramAgg

  area:aggregationenhancement
  apache/datafusion-comet#7571 · Filter by author ErikBPF opened on Nov 8, 2026

• Support Delta FileSizeHistogramAgg

  area:aggregationenhancement
  apache/datafusion-comet#7570 · Filter by author ErikBPF opened on Nov 8, 2026

• Native Iceberg errors print data and delete file paths with their credentials

  bugpriority:medium
  apache/datafusion-comet#7559 · Filter by author dwsmith1983 opened on Nov 7, 2026 · 1.3.0
  2

• ParquetWriterExec's derived Debug prints object store options, which can hold secret keys

  area:writerbugpriority:low
  apache/datafusion-comet#7558 · Filter by author dwsmith1983 opened on Nov 7, 2026

• Comet Native Executors: run a query in Spark when Comet is turned off

  enhancement
  apache/datafusion-comet#7557 · Filter by author andygrove opened on Nov 7, 2026

• Spark window over a doubted input order gets a sort by its own keys only, and operators above it return wrong rows

  bugcorrectnesspriority:critical
  apache/datafusion-comet#7553 · Filter by author dwsmith1983 opened on Nov 7, 2026 · 1.3.0
  1

  

• GetArrayItem fails on a non-INT index: could not cast array of type Int64 ...

  area:expressionsbugpriority:high
  apache/datafusion-comet#7551 · Filter by author akupchinskiy opened on Nov 7, 2026 · 1.3.0
  

• [Bug] hll_* errors surface as Comet errors instead of HLL_INVALID_INPUT_SKETCH_BUFFER / HLL_UNION_DIFFERENT_LG_K

  area:expressionsbugpriority:low
  apache/datafusion-comet#7549 · Filter by author tlfua opened on Nov 7, 2026

• [Bug] hll_sketch_agg, hll_union and hll_union_agg write compact sketch bytes where Spark writes updatable ones

  area:aggregationarea:expressionsbugpriority:medium
  apache/datafusion-comet#7548 · Filter by author tlfua opened on Nov 7, 2026