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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2019/04/18 20:58:00 UTC

[jira] [Work started] (HIVE-21633) Estimate range for value generated by aggregate function in statistics annotation

     [ https://issues.apache.org/jira/browse/HIVE-21633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-21633 started by Jesus Camacho Rodriguez.
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> Estimate range for value generated by aggregate function in statistics annotation
> ---------------------------------------------------------------------------------
>
>                 Key: HIVE-21633
>                 URL: https://issues.apache.org/jira/browse/HIVE-21633
>             Project: Hive
>          Issue Type: Improvement
>          Components: Statistics
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Major
>         Attachments: HIVE-21633.patch
>
>
> In some cases, we can infer the estimate of the range for a value generated by an aggregate function during statistics annotation. For instance, we can estimate the min of the sum of a column with positive min value as that same min value.



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