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From "Chaoyu Tang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16803) Alter table change column comment should not try to get column stats for update
Date Thu, 01 Jun 2017 20:11:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16033590#comment-16033590
] 

Chaoyu Tang commented on HIVE-16803:
------------------------------------

I was not able to reproduce the failures of TestCliDriver[stats_aggregator_error_1], TestMiniLlapLocalCliDriver[columnstats_part_coltype.q],
TestPerfCliDriver[query14.q] in my local machine. They seems to be flaky tests and not related
to this patch.
[~pxiong], could you help to review this patch? Thanks.

> Alter table change column comment should not try to get column stats for update
> -------------------------------------------------------------------------------
>
>                 Key: HIVE-16803
>                 URL: https://issues.apache.org/jira/browse/HIVE-16803
>             Project: Hive
>          Issue Type: Bug
>          Components: Statistics
>            Reporter: Chaoyu Tang
>            Assignee: Chaoyu Tang
>            Priority: Minor
>         Attachments: HIVE-16803.patch
>
>
> When running command like "alter table .. change .." (e.g. ALTER TABLE testtbl CHANGE
col col string COMMENT 'change column comment';) to change a column's comment, Hive should
not go to fetch the column stats for update since the comment change does not affect table/partition
column stats.



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