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https://issues.apache.org/jira/browse/SPARK-37193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman resolved SPARK-37193.
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Fix Version/s: 3.3.0
Resolution: Abandoned
this was addressed in SPARK-37753
> DynamicJoinSelection.shouldDemoteBroadcastHashJoin should not apply to outer
> joins
> ----------------------------------------------------------------------------------
>
> Key: SPARK-37193
> URL: https://issues.apache.org/jira/browse/SPARK-37193
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.1
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Major
> Fix For: 3.3.0
>
>
> {{DynamicJoinSelection.shouldDemoteBroadcastHashJoin}} will prevent AQE from
> converting Sort merge join into a broadcast join because SMJ is faster when
> the side that would be broadcast has a lot of empty partitions.
> This makes sense for inner joins which can short circuit if one side is
> empty.
> For (left,right) outer join, the streaming side still has to be processed so
> demoting broadcast join doesn't have the same advantage.
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