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https://issues.apache.org/jira/browse/SPARK-51337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-51337.
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Fix Version/s: 4.1.0
Resolution: Fixed
Issue resolved by pull request 50104
[https://github.com/apache/spark/pull/50104]
> Add maxRows field to CTERelationDef and CTERelationRef
> ------------------------------------------------------
>
> Key: SPARK-51337
> URL: https://issues.apache.org/jira/browse/SPARK-51337
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.1.0
> Reporter: Vladimir Golubev
> Assignee: Vladimir Golubev
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.1.0
>
>
> The Analyzer validates scalar subqueries by checking if it outputs just one
> row or not:
> https://github.com/vladimirg-db/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/ValidateSubqueryExpression.scala#L144.
> This works in fixed-point Analyzer, because CTEs are inlined before
> CheckAnalysis. However, in single-pass Analyzer, we validate the subquery
> right after its validation, so CTERelationRef must output correct maxRows as
> well.
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