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

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

mcdull_zhang created SPARK-36082:
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             Summary: 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
             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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