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From "ASF GitHub Bot (JIRA)" <>
Subject [jira] [Work logged] (HIVE-22046) Differentiate among column stats computed by different engines
Date Tue, 30 Jul 2019 16:51:00 GMT


ASF GitHub Bot logged work on HIVE-22046:

                Author: ASF GitHub Bot
            Created on: 30/Jul/19 16:50
            Start Date: 30/Jul/19 16:50
    Worklog Time Spent: 10m 
      Work Description: jcamachor commented on pull request #741: HIVE-22046
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Issue Time Tracking

            Worklog Id:     (was: 285096)
            Time Spent: 10m
    Remaining Estimate: 0h

> Differentiate among column stats computed by different engines
> --------------------------------------------------------------
>                 Key: HIVE-22046
>                 URL:
>             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.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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