1.1.0

Issues

• Drop support for Spark 3.4

  enhancementpriority:low
  apache/datafusion-comet#4329 · Filter by author andygrove opened on May 14, 2026 · 1.1.0
  3

• Row-level Parquet filter pushdown regresses uncorrelated-predicate scans (TPC-H Q6 +80%)

  area:scanenhancementperformance
  apache/datafusion-comet#4988 · Filter by author andygrove opened on Jul 21, 2026 · 1.1.0
  1

• feat: enable CometLocalTableScanExec by default

  area:scanenhancement
  Unread
  apache/datafusion-comet#4393·mbutrovich opened May 21, 2026 · Updated Sep 6, 2026·Draft
  3

  

• [EPIC] Planner, serde, and optimizer rule performance audit

  enhancementEPICperformance
  apache/datafusion-comet#5199 · Filter by author andygrove opened on Aug 1, 2026 · 1.1.0
  1

  

• Shuffle performance audit: candidate optimizations needing investigation

  area:shuffleenhancementperformance
  apache/datafusion-comet#5198 · Filter by author andygrove opened on Aug 1, 2026 · 1.1.0
  

• Native Parquet schema-on-read diverges from Spark for ANSI interval targets

  area:scanbugpriority:medium
  apache/datafusion-comet#5188 · Filter by author peterxcli opened on Aug 1, 2026 · 1.1.0
  1

  

• [Bug] Native make_interval overflows valid time components or loses seconds precision

  area:expressionsbugpriority:medium
  apache/datafusion-comet#5131 · Filter by author peterxcli opened on Jul 29, 2026 · 1.1.0
  

• [EPIC] ANSI mode audit follow-ups (vs Spark 4.1.1)

  area:expressionsbugEPICpriority:medium
  apache/datafusion-comet#5078 · Filter by author andygrove opened on Jul 28, 2026 · 1.1.0
  1

  

• fix: fall back to Spark for negative-scale decimal casts and arithmetic

  area:expressionsbugcorrectness
  Unread
  apache/datafusion-comet#5050·0lai0 opened Jul 27, 2026 · Updated Oct 6, 2026
  14

• RANGE window frame boundary overflow diverges from Spark for DATE and DECIMAL ORDER BY

  area:expressionsbugcorrectnesspriority:high
  apache/datafusion-comet#5022 · Filter by author andygrove opened on Jul 24, 2026 · 1.1.0
  6

  

• Native panic casting to negative-scale decimal when spark.sql.legacy.allowNegativeScaleOfDecimal=true

  area:expressionsbugcrashpriority:high
  apache/datafusion-comet#5013 · Filter by author andygrove opened on Jul 23, 2026 · 1.1.0
  3

  

• Ranked backlog: native scalar expressions with per-row optimization opportunities

  enhancementperformance
  apache/datafusion-comet#4942 · Filter by author andygrove opened on Jul 15, 2026 · 1.1.0
  

• [Bug] map_from_arrays / map_from_entries do not enforce null-key rejection or spark.sql.mapKeyDedupPolicy

  area:expressionsbugcorrectnesspriority:medium
  apache/datafusion-comet#4680 · Filter by author andygrove opened on Jun 18, 2026 · 1.1.0
  3

  

• Add a docs-review Claude skill to enforce style guide and documentation quality

  documentationpriority:low
  apache/datafusion-comet#4420 · Filter by author andygrove opened on May 24, 2026 · 1.1.0
  

• Establish nomenclature style guide and audit operator names for clarity

  documentationpriority:low
  apache/datafusion-comet#4419 · Filter by author andygrove opened on May 24, 2026 · 1.1.0
  

• native_datafusion: ParquetSchemaConvert error does not include the file path

  native_datafusion
  apache/datafusion-comet#4316 · Filter by author andygrove opened on May 13, 2026 · 1.1.0
  1

• Re-enable COUNT for mixed Spark partial / Comet final aggregate execution

  area:aggregationpriority:medium
  apache/datafusion-comet#4242 · Filter by author andygrove opened on May 6, 2026 · 1.1.0
  1

  

• Audit Spark SQL configs that affect query semantics and ensure Comet honors them (or falls back)

  area:expressionsarea:scanenhancementpriority:medium
  apache/datafusion-comet#4180 · Filter by author andygrove opened on May 1, 2026 · 1.1.0
  2

• Register CometArrowAllocator as a Spark MemoryConsumer for JVM-UDF dispatch

  area:expressionsarea:ffipriority:medium
  apache/datafusion-comet#4174 · Filter by author andygrove opened on May 1, 2026 · 1.1.0
  1

  

• Consistent debug logging levels and messages

  enhancement
  apache/datafusion-comet#3445 · Filter by author mbutrovich opened on Feb 8, 2026 · 1.1.0
  1

• [hdfs-opendal] Got an reader got too little data error on hdfs-opendal

  area:scanbugnative_datafusionpriority:medium
  apache/datafusion-comet#2400 · Filter by author wForget opened on Sep 16, 2025 · 1.1.0
  13

  

• feat: add native Delta Lake scan contrib module (page/row-group pruning)

  area:joinsarea:scanenhancement
  Unread
  apache/datafusion-comet#5365·dwsmith1983 opened Aug 15, 2026 · Updated Oct 11, 2026
  321

• fix: dispatch map lookups with normalized keys and nondeterministic null-guarded children

  area:expressionsbugrun-all-spark-profiles
  Unread
  apache/datafusion-comet#5867·dwsmith1983 opened Sep 11, 2026 · Updated Oct 11, 2026
  32

• Hash partitioning not falling back to Spark for high precision decimal partition keys

  bugpriority:critical
  apache/datafusion-comet#3079 · Filter by author andygrove opened on Jan 13, 2026 · 1.1.0
  4