[
https://issues.apache.org/jira/browse/HIVE-8667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14192392#comment-14192392
]
Laljo John Pullokkaran commented on HIVE-8667:
----------------------------------------------
I think issue here is Calcite doesn't recognizes always false filter as a a
special case and doesn't push it both ways.
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
