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Posted to issues@spark.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2025/02/27 11:21:00 UTC

[jira] [Updated] (SPARK-51337) Add maxRows field to CTERelationRef

     [ https://issues.apache.org/jira/browse/SPARK-51337?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated SPARK-51337:
-----------------------------------
    Labels: pull-request-available  (was: )

> Add maxRows field to 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
>            Priority: Major
>              Labels: pull-request-available
>
> 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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