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https://issues.apache.org/jira/browse/HIVE-22046?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16896385#comment-16896385
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Jesus Camacho Rodriguez commented on HIVE-22046:
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[~vihang], can you review this patch?
https://github.com/apache/hive/pull/741
Thanks
> Differentiate among column stats computed by different engines
> --------------------------------------------------------------
>
> Key: HIVE-22046
> URL: https://issues.apache.org/jira/browse/HIVE-22046
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-22046.01.patch, HIVE-22046.02.patch,
> HIVE-22046.03.patch, HIVE-22046.04.patch, HIVE-22046.05.patch,
> HIVE-22046.06.patch, HIVE-22046.07.patch, HIVE-22046.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The goal is to avoid computation of column stats by engines to step on each
> other, e.g., Hive and Impala. In longer term, we may introduce a common
> representation for the column statistics stored by different engines.
> For this issue, we will add a new column 'engine' to TAB_COL_STATS HMS table
> (unpartitioned tables) and to PART_COL_STATS HMS table (partitioned tables).
> This will prevent conflicts at the column level stats.
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