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From "Vineet Garg (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-21572) HiveRemoveSqCountCheck rule could be enhanced to capture more patterns
Date Fri, 12 Apr 2019 23:12:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-21572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vineet Garg updated HIVE-21572:
-------------------------------
    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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