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https://issues.apache.org/jira/browse/SPARK-36082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chao Sun updated SPARK-36082:
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Fix Version/s: 4.3.0
5.0.0
> when the right side is small enough to use SingleColumn Null Aware Anti Join
> ----------------------------------------------------------------------------
>
> Key: SPARK-36082
> URL: https://issues.apache.org/jira/browse/SPARK-36082
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.2.0
> Reporter: mcdull_zhang
> Priority: Minor
> Labels: pull-request-available
> Fix For: 4.2.0, 4.3.0, 5.0.0
>
>
> NULL-aware ANTI join (https://issues.apache.org/jira/browse/SPARK-32290) will
> build right side into a HashMap.
> code in SparkStrategy:
>
> {code:java}
> case j @ ExtractSingleColumnNullAwareAntiJoin(leftKeys, rightKeys) =>
> Seq(joins.BroadcastHashJoinExec(leftKeys, rightKeys, LeftAnti, BuildRight,
> None, planLater(j.left), planLater(j.right), isNullAwareAntiJoin =
> true)){code}
> we should add the conditions and use this optimization when the size of the
> right side is small enough.
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