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https://issues.apache.org/jira/browse/HIVE-17859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin resolved HIVE-17859.
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Resolution: Not A Problem
> MM tables - Tez merge may not run
> ---------------------------------
>
> Key: HIVE-17859
> URL: https://issues.apache.org/jira/browse/HIVE-17859
> Project: Hive
> Issue Type: Sub-task
> Components: Transactions
> Reporter: Sergey Shelukhin
> Priority: Major
> Labels: mm-gap-2
>
> If mm_all test is executed on MiniLlap, all the merge test cases pass but
> with changed order of rows; however, one can see in stats_mm, etc cases that
> while the stats are correct, the number of files changes. Seems like merge
> doesn't work in this case where it worked before. It's not pertinent to stats
> cases but it should be examined. Perhaps stats output for the # of files
> should be added to merge cases to make sure merge actually merges.
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