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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-16169) Improve StatsOptimizer to deal with groupby partition columns
Date Fri, 10 Mar 2017 02:27:37 GMT

     [ https://issues.apache.org/jira/browse/HIVE-16169?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Pengcheng Xiong reassigned HIVE-16169:
--------------------------------------


> Improve StatsOptimizer to deal with groupby partition columns
> -------------------------------------------------------------
>
>                 Key: HIVE-16169
>                 URL: https://issues.apache.org/jira/browse/HIVE-16169
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>
> As reported by [~ashutoshc]
> 1) select sum(c), count(c),... from T group by b;
> 2) select max(c), min(c), ... from T group by b;
> If b happens to be a partition column, we can also answer these from metadata.  Currently,
StatsOptimizer don't handle these queries, but we can extend it to handle those as well.



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