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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2017/06/21 19:29:00 UTC

[jira] [Work started] (HIVE-16934) Transform COUNT(x) into COUNT() when x is not nullable

     [ https://issues.apache.org/jira/browse/HIVE-16934?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-16934 started by Jesus Camacho Rodriguez.
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> 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.patch
>
>
> Add a rule to simplify COUNT aggregation function if possible, removing expressions that cannot be nullable from its parameters.



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