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Add support for Java data sources

enhancementNew feature or requestNew feature or request

Status: Open.

Feature

#63 In apache/datafusion-java;

· andygrove opened on May 18, 2026

bug(udf): scalar UDFs over nested Arrow types cannot be registered

bugSomething isn't workingSomething isn't working

Status: Open.

Bug

#58 In apache/datafusion-java;

· LantaoJin opened on May 18, 2026

Propagate Java stack traces from JVM upcalls into DataFusionError

Status: Open.

#55 In apache/datafusion-java;

· andygrove opened on May 17, 2026

feat(dataframe): expose introspection methods (schema, explain, cache, describe)

enhancementNew feature or requestNew feature or request

Status: Open.

#45 In apache/datafusion-java;

· andygrove opened on May 13, 2026

design: DataFrame joins (join, joinOn) and the Java Expr question

enhancementNew feature or requestNew feature or request

Status: Open.

#44 In apache/datafusion-java;

· andygrove opened on May 13, 2026

feat(dataframe): expose set operations (union, intersect, except)

enhancementNew feature or requestNew feature or request

Status: Open.

#43 In apache/datafusion-java;

· andygrove opened on May 13, 2026

feat(dataframe): expose sort and repartition

enhancementNew feature or requestNew feature or request

Status: Open.

#42 In apache/datafusion-java;

· andygrove opened on May 13, 2026

bug: SessionContext.close() / DataFrame.close() race with concurrent JNI calls (use-after-free)

bugSomething isn't workingSomething isn't working

Status: Open.

#40 In apache/datafusion-java;

· andygrove opened on May 13, 2026

feat: add DataFrame.writeJson with JsonWriteOptions

enhancementNew feature or requestNew feature or request

Status: Open.

#39 In apache/datafusion-java;

· andygrove opened on May 13, 2026

Publish fat JAR with platform-specific native libraries to Maven Central

Status: Open.

#33 In apache/datafusion-java;

· andygrove opened on May 13, 2026

Decide on sync vs async DataFrame methods

enhancementNew feature or requestNew feature or request

Status: Open.

Feature

#25 In apache/datafusion-java;

· andygrove opened on May 13, 2026

Add scripts for release process

Status: Open.

#2 In apache/datafusion-java;

· andygrove opened on May 13, 2026