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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16934) Transform COUNT(x) into COUNT() when x is not nullable
Date Sat, 24 Jun 2017 01:51:01 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16061729#comment-16061729
] 

Ashutosh Chauhan commented on HIVE-16934:
-----------------------------------------

+1

> Transform COUNT(x) into COUNT() when x is not nullable
> ------------------------------------------------------
>
>                 Key: HIVE-16934
>                 URL: https://issues.apache.org/jira/browse/HIVE-16934
>             Project: Hive
>          Issue Type: Improvement
>          Components: Logical Optimizer
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>         Attachments: HIVE-16934.01.patch, HIVE-16934.02.patch, HIVE-16934.03.patch, HIVE-16934.patch
>
>
> Add a rule to simplify COUNT aggregation function if possible, removing expressions that
cannot be nullable from its parameters.



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