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From "Zoltan Haindrich (Jira)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-22913) HiveReduceExpressionsWithStatsRule should not invoke simplifcation during end of visits
Date Thu, 20 Feb 2020 07:51:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-22913?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zoltan Haindrich reassigned HIVE-22913:
---------------------------------------


> HiveReduceExpressionsWithStatsRule should not invoke simplifcation during end of visits
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-22913
>                 URL: https://issues.apache.org/jira/browse/HIVE-22913
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>
> * doing a simplification is a full visit of the subtree
> * in case the rule makes a structural change; it will invoke simplification during exiting
the recursion
> https://github.com/apache/hive/blob/5012954396c98c94d0ff64fe3bbdb74e6077f190/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveReduceExpressionsWithStatsRule.java#L275



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