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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-11160) Auto-gather column stats
Date Fri, 04 Mar 2016 17:27:40 GMT

    [ https://issues.apache.org/jira/browse/HIVE-11160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15180193#comment-15180193
] 

Ashutosh Chauhan commented on HIVE-11160:
-----------------------------------------

It will be good to have test run on this with config value to set. Can you set that to true
in data/conf/hive-site.xml ?

> Auto-gather column stats
> ------------------------
>
>                 Key: HIVE-11160
>                 URL: https://issues.apache.org/jira/browse/HIVE-11160
>             Project: Hive
>          Issue Type: New Feature
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-11160.01.patch, HIVE-11160.02.patch, HIVE-11160.03.patch, HIVE-11160.04.patch
>
>
> Hive will collect table stats when set hive.stats.autogather=true during the INSERT OVERWRITE
command. And then the users need to collect the column stats themselves using "Analyze" command.
In this patch, the column stats will also be collected automatically. More specifically, INSERT
OVERWRITE will automatically create new column stats. INSERT INTO will automatically merge
new column stats with existing ones.



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