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From "Gunther Hagleitner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7535) Make use of number of nulls column statistics in filter rule
Date Mon, 28 Jul 2014 23:23:39 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14077119#comment-14077119
] 

Gunther Hagleitner commented on HIVE-7535:
------------------------------------------

+1 LGTM

> Make use of number of nulls column statistics in filter rule
> ------------------------------------------------------------
>
>                 Key: HIVE-7535
>                 URL: https://issues.apache.org/jira/browse/HIVE-7535
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor, Statistics
>    Affects Versions: 0.14.0
>            Reporter: Prasanth J
>            Assignee: Prasanth J
>            Priority: Minor
>             Fix For: 0.13.0
>
>         Attachments: HIVE-7535.1.patch
>
>
> The filter rule does not make use of number of nulls column statistics for "IS NULL"
and "IS NOT NULL" expression evaluation.



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