[jira] [Assigned] (SPARK-39216) Issue with correlated subquery and Union

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

     [ https://issues.apache.org/jira/browse/SPARK-39216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-39216:
------------------------------------

    Assignee:     (was: Apache Spark)

> Issue with correlated subquery and Union
> ----------------------------------------
>
>                 Key: SPARK-39216
>                 URL: https://issues.apache.org/jira/browse/SPARK-39216
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.3.0
>            Reporter: Allison Wang
>            Priority: Major
>
>  
> SPARK-37915 added CollapseProject in rule CombineUnions, but it shouldn't collapse projects that contain correlated subqueries since haven't been de-correlated (PullupCorrelatedPredicates).
> Here is a simple example to reproduce this issue
> {code:java}
> SELECT (SELECT IF(x, 1, 0)) AS a
> FROM (SELECT true) t(x)
> UNION 
> SELECT 1 AS a {code}
> Exception:
> {code:java}
> java.lang.IllegalStateException: Couldn't find x#4 in [] {code}
>  



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