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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2019/07/25 01:35:00 UTC

[jira] [Work started] (HIVE-22046) Differentiate among column stats computed by different engines

     [ https://issues.apache.org/jira/browse/HIVE-22046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HIVE-22046 started by Jesus Camacho Rodriguez.
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> 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
>         Attachments: HIVE-22046.patch
>
>
> 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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