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https://issues.apache.org/jira/browse/HIVE-18140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltan Haindrich updated HIVE-18140:
------------------------------------
    Attachment: HIVE-18140.01wip02.patch

> Partitioned tables statistics can go wrong in basic stats mixed case
> --------------------------------------------------------------------
>
>                 Key: HIVE-18140
>                 URL: https://issues.apache.org/jira/browse/HIVE-18140
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>         Attachments: HIVE-18140.01wip01.patch, HIVE-18140.01wip02.patch
>
>
> suppose the following scenario:
> * part1 has basic stats {{RC=10,DS=1K}}
> * all other partition has no basic stats (and a bunch of rows)
> then 
> [this|https://github.com/apache/hive/blob/d9924ab3e285536f7e2cc15ecbea36a78c59c66d/ql/src/java/org/apache/hadoop/hive/ql/stats/StatsUtils.java#L378]
>  condition would be false; which in turn produces estimations for the whole 
> partitioned table: {{RC=10,DS=1K}}



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