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https://issues.apache.org/jira/browse/SPARK-24838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16549293#comment-16549293
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Maurits van der Goes commented on SPARK-24838:
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Worked with [~hvanhovell] on a fix. This is what I currently have:
[https://github.com/apache/spark/compare/master...vanderGoes:SPARK-24838]
Will polish it a bit and provide comments before PR.
> Support uncorrelated IN/EXISTS subqueries for more operators
> -------------------------------------------------------------
>
> Key: SPARK-24838
> URL: https://issues.apache.org/jira/browse/SPARK-24838
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.3.1
> Reporter: Qifan Pu
> Priority: Major
> Labels: spree
>
> Currently, CheckAnalysis allows IN/EXISTS subquery only for filter operators.
> Running a query:
> {{select name in (select * from valid_names)}}
> {{from all_names}}
> returns error:
> {code:java}
> Error in SQL statement: AnalysisException: IN/EXISTS predicate sub-queries
> can only be used in a Filter
> {code}
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