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From "Gunther Hagleitner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8667) CBO: optimize_nullscan - some TableScans for nullscans appeared after CBO
Date Thu, 30 Oct 2014 20:47:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14190801#comment-14190801
] 

Gunther Hagleitner commented on HIVE-8667:
------------------------------------------

[~sershe] - can you please attach the plan/diff fragement that you think isn't in line with
the optimization?

> CBO: optimize_nullscan - some TableScans for nullscans appeared after CBO
> -------------------------------------------------------------------------
>
>                 Key: HIVE-8667
>                 URL: https://issues.apache.org/jira/browse/HIVE-8667
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CBO
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>             Fix For: 0.15.0
>
>
> Looks like some rewriting by CBO prevents nullscans from being optimized.



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