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Posted to issues@hive.apache.org by "Zoltan Haindrich (JIRA)" <ji...@apache.org> on 2018/02/26 10:05:00 UTC

[jira] [Commented] (HIVE-18805) Move ConstantPropagate before stats

    [ https://issues.apache.org/jira/browse/HIVE-18805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16376615#comment-16376615 ] 

Zoltan Haindrich commented on HIVE-18805:
-----------------------------------------

I've looked into these mysterious statistics differences; and they are because of HIVE-18804 ; I think the "scope" of that miscalculation is  a bit wider than just these "few" cases

> Move ConstantPropagate before stats
> -----------------------------------
>
>                 Key: HIVE-18805
>                 URL: https://issues.apache.org/jira/browse/HIVE-18805
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Planning
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>         Attachments: HIVE-18805.01.patch
>
>
> this seems to also make a few more optimizations identify more cases



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