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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-19995) Aggregate row traffic for acid tables
Date Thu, 28 Jun 2018 15:33:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-19995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16526436#comment-16526436
] 

Ashutosh Chauhan commented on HIVE-19995:
-----------------------------------------

+1

> Aggregate row traffic for acid tables
> -------------------------------------
>
>                 Key: HIVE-19995
>                 URL: https://issues.apache.org/jira/browse/HIVE-19995
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Statistics, Transactions
>            Reporter: Zoltan Haindrich
>            Assignee: Zoltan Haindrich
>            Priority: Major
>         Attachments: HIVE-19995.01.patch, HIVE-19995.01wip01.patch, HIVE-19995.01wip01.patch,
HIVE-19995.01wip02.patch, HIVE-19995.02.patch
>
>
> for transactional tables we store basic stats in case of explicit analyze/rewrite; but
doesn't do anything in other cases....which may even lead to plans which oom...
> It would be better to aggregate the total row traffic...because that is already available;
so that operator tree estimations could work with a real upper bound of the row numbers.



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