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Add MultiDistinctToCrossJoin optimizer rule for parallel distinct aggregates

enhancementNew feature or requestNew feature or request

Status: Open.

Feature

#20942 In apache/datafusion;

· Dandandan opened on Mar 14, 2026

Dynamic filter pushdown fails with "Can't compare arrays of different types" when joining VALUES against Dictionary-encoded Parquet columns

Status: Open.

#20937 In apache/datafusion;

· erratic-pattern opened on Mar 13, 2026

String scalar functions should preserve Dictionary encoding for Dictionary-typed inputs

Status: Open.

#20935 In apache/datafusion;

· erratic-pattern opened on Mar 13, 2026

Improve performance of ScalarValue::add

Status: Open.

#20933 In apache/datafusion;

· alamb opened on Mar 13, 2026

Improve DataFusion stability for different batch_size values

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#20919 In apache/datafusion;

· comphead opened on Mar 12, 2026

[EPIC] Sort-merge join (SMJ) execution improvements

EPICA larger project, actively underway, with sub tasksA larger project, actively underway, with sub tasks

performanceMake DataFusion fasterMake DataFusion faster

physical-planChanges to the physical-plan crateChanges to the physical-plan crate

Status: Open.

#20910 In apache/datafusion;

· mbutrovich opened on Mar 12, 2026

Incorrectly parsed SQL query containing GROUP BY ALL and an alias in the projection

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#20909 In apache/datafusion;

· drin opened on Mar 12, 2026

DefaultPhysicalExprAdapterRewriter doesn't handle structs inside complex types

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#20906 In apache/datafusion;

· asubiotto opened on Mar 12, 2026

Incorrect ORDER BY in unparser after DF 52 upgrade

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#20905 In apache/datafusion;

· alamb opened on Mar 12, 2026

[EPIC] Improve NUMA-awareness

EPICA larger project, actively underway, with sub tasksA larger project, actively underway, with sub tasks

performanceMake DataFusion fasterMake DataFusion faster

Status: Open.

Feature

#20902 In apache/datafusion;

· Dandandan opened on Mar 12, 2026

Implement ExecutionPlan::map_expressions

enhancementNew feature or requestNew feature or request

Status: Open.

Feature

#20899 In apache/datafusion;

· LiaCastaneda opened on Mar 12, 2026

spark: introduce Spark arrays_zip

enhancementNew feature or requestNew feature or request

spark

Status: Open.

Feature

#20888 In apache/datafusion;

· comphead opened on Mar 11, 2026