caican created SPARK-44426:
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Summary: optimize adaptive skew join for ExistenceJoin
Key: SPARK-44426
URL: https://issues.apache.org/jira/browse/SPARK-44426
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.4.0, 3.3.0, 3.2.0, 3.1.2
Reporter: caican
For this query, InSubQuery would be cast to `ExistenceJoin` and now
`ExistenceJoin` does not support automatic data skew for the left table.
{code:java}
SELECT * FROM skewData1
where
(key1 in (select key2 from skewData2)
or value1 in (select value2 from skewData2){code}
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