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https://issues.apache.org/jira/browse/SPARK-43308?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jia Fan updated SPARK-43308:
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Parent: SPARK-35553
Issue Type: Sub-task (was: Improvement)
> Improve scalar subquery logic plan when result are literal
> ----------------------------------------------------------
>
> Key: SPARK-43308
> URL: https://issues.apache.org/jira/browse/SPARK-43308
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.5.0
> Reporter: Jia Fan
> Priority: Major
>
> When use scalar subquery, sometimes we can get result before physical plan
> execute.
> Like `select a, (select (count(1)) is null from r where a = c group by c)
> from l where a < 4`.
> The result alway be false. So we can skip unnecessary aggregate.
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