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From "Zoltan Haindrich (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-17084) Turn on hive.stats.fetch.column.stats configuration flag
Date Tue, 21 Aug 2018 07:25:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16587093#comment-16587093
] 

Zoltan Haindrich commented on HIVE-17084:
-----------------------------------------

I wonder if we will still have enough tests to cover it when column stats are not available:
because there were some tests which explicitly turned it on - however there's only a few which
disable it... but anyway: having more test coverage when it's enabled is better anyway...
this patch also makes the perf cli plans more realistic!
+1

> Turn on hive.stats.fetch.column.stats configuration flag
> --------------------------------------------------------
>
>                 Key: HIVE-17084
>                 URL: https://issues.apache.org/jira/browse/HIVE-17084
>             Project: Hive
>          Issue Type: Task
>          Components: Statistics
>            Reporter: Vineet Garg
>            Assignee: Vineet Garg
>            Priority: Major
>             Fix For: 3.2.0
>
>         Attachments: HIVE-17084.1.patch, HIVE-170884.4.patch, HIVE-170884.5.patch
>
>
> This flag is off by default and could result in bad plans due to missing column statistics.



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