[jira] [Assigned] (SPARK-36082) when the right side is small enough to use SingleColumn Null Aware Anti Join

["Apache Spark (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-36082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-36082:
------------------------------------

    Assignee: Apache Spark

> 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: 3.2.0, 3.1.3
>            Reporter: mcdull_zhang
>            Assignee: Apache Spark
>            Priority: Minor
>             Fix For: 3.2.0
>
>
> 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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