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https://issues.apache.org/jira/browse/HIVE-18571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16352876#comment-16352876
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Sergey Shelukhin commented on HIVE-18571:
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The original test case if dynpart_sort_optimization with MM-by-default patch,
that has stats differences due to both of these issues (rows are incorrect due
to incorrect accumulation, and size and number of files due to counting
obsolete directories).
> stats issues for MM tables
> --------------------------
>
> Key: HIVE-18571
> URL: https://issues.apache.org/jira/browse/HIVE-18571
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Priority: Major
> Attachments: HIVE-18571.01.patch, HIVE-18571.patch
>
>
> There are multiple stats aggregation issues with MM tables.
> Some simple stats are double counted and some stats (simple stats) are
> invalid for ACID table dirs altogether.
> I have a patch almost ready, need to fix some more stuff and clean up.
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