[ https://issues.apache.org/jira/browse/SPARK-38237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jungtaek Lim updated SPARK-38237: --------------------------------- Summary: Introduce a new config to require all cluster keys on Aggregate (was: Rename back StatefulOpClusteredDistribution to HashClusteredDistribution) > Introduce a new config to require all cluster keys on Aggregate > --------------------------------------------------------------- > > Key: SPARK-38237 > URL: https://issues.apache.org/jira/browse/SPARK-38237 > Project: Spark > Issue Type: Task > Components: SQL, Structured Streaming > Affects Versions: 3.3.0 > Reporter: Jungtaek Lim > Priority: Major > > We still find HashClusteredDistribution be useful for batch query as well. > For example, we had a case with lower parallelism than expected due to the > fact ClusteredDistribution is used for aggregation which matches with > HashPartitioning with sub-key groups (note that the technical parallelism > also depends on "cardinality" - picking sub-key groups means having less > cardinality). > We propose to rename back HashClusteredDistribution with retaining NOTE for > stateful operator. The distribution should not be still touched anyway due to > the requirement of stateful operator, but can be co-used with batch case if > needed. -- This message was sent by Atlassian Jira (v8.20.1#820001) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org