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chore: Remove invalid spark.sql.optimizer.constantFolding.enabled configuration from java benchmarks.

requires-triage

Status: Open.

#4656 In apache/datafusion-comet;

· wForget opened on Jun 15, 2026

pref: Use builtin compression for arrow ipc writer

enhancementNew feature or requestNew feature or request

requires-triage

Status: Open.

#4655 In apache/datafusion-comet;

· wForget opened on Jun 15, 2026

Discussion: remove incompatible native implementations that have a codegen dispatch fallback?

requires-triage

Status: Open.

#4654 In apache/datafusion-comet;

· andygrove opened on Jun 14, 2026

Gate non-default StringTypeWithCollation inputs on Spark 4.0 datetime expressions

bugSomething isn't workingSomething isn't working

requires-triage

Status: Open.

#4646 In apache/datafusion-comet;

· andygrove opened on Jun 12, 2026

Add optional native Lance scan support

requires-triage

Status: Open.

#4632 In apache/datafusion-comet;

· wirybeaver opened on Jun 12, 2026

chore: Improve cast MapType to String

good first issueGood for newcomersGood for newcomers

priority:mediumFunctional bugs, performance regressions, broken featuresFunctional bugs, performance regressions, broken features

Status: Open.

#4631 In apache/datafusion-comet;

· comphead opened on Jun 12, 2026

perf: use aligned slice access in SparkUnsafeArray bulk append

requires-triage

Status: Open.

#4626 In apache/datafusion-comet;

· andygrove opened on Jun 11, 2026

Bug triage results: 2026-06-11

requires-triage

Status: Open.

#4625 In apache/datafusion-comet;

· andygrove opened on Jun 11, 2026

Test dual-impl (native + codegen-dispatch) expressions consistently across the full routing matrix

area:expressionsExpression evaluationExpression evaluation

priority:lowMinor issues, test failures, tooling, cosmeticMinor issues, test failures, tooling, cosmetic

Status: Open.

#4616 In apache/datafusion-comet;

· andygrove opened on Jun 10, 2026

Performance regression when a stage of WholeStageCodegen-fusible operators runs as separate native Comet operators

performance

priority:mediumFunctional bugs, performance regressions, broken featuresFunctional bugs, performance regressions, broken features

Status: Open.

#4614 In apache/datafusion-comet;

· mbutrovich opened on Jun 9, 2026

Deliberately opt eligible Incompatible expressions into codegen dispatch with test coverage

area:expressionsExpression evaluationExpression evaluation

priority:mediumFunctional bugs, performance regressions, broken featuresFunctional bugs, performance regressions, broken features

Status: Open.

#4596 In apache/datafusion-comet;

· andygrove opened on Jun 4, 2026

ci: Remove ORC testing from Iceberg Java tests

area:ciCI/CD, GitHub Actions, build toolingCI/CD, GitHub Actions, build tooling

priority:lowMinor issues, test failures, tooling, cosmeticMinor issues, test failures, tooling, cosmetic

Status: Open.

#4586 In apache/datafusion-comet;

· mbutrovich opened on Jun 3, 2026