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