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https://issues.apache.org/jira/browse/HIVE-21572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vineet Garg updated HIVE-21572:
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Status: Open (was: Patch Available)
> HiveRemoveSqCountCheck rule could be enhanced to capture more patterns
> -----------------------------------------------------------------------
>
> Key: HIVE-21572
> URL: https://issues.apache.org/jira/browse/HIVE-21572
> Project: Hive
> Issue Type: Bug
> Components: Query Planning
> Affects Versions: 4.0.0
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Attachments: HIVE-21572.1.patch, HIVE-21572.2.patch,
> HIVE-21572.3.patch
>
>
> HIVE-21231 caused the pattern of scalar subqueries to change a bit causing
> HiveRemoveSqCountCheck rule to not kick in anymore.
> Queries for which this has regressed are the ones which contain group by with
> constant keys. getRelMdMaxRowCount needs to be improved for this to work.
> Ref: CALCITE-2991
>
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