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https://issues.apache.org/jira/browse/HIVE-1394?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12885680#action_12885680
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John Sichi commented on HIVE-1394:
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Note HIVE-1442, which prevents this feature from being used. Also, someone
needs to document it.
> do not update transient_lastDdlTime if the partition is modified by a
> housekeeping operation
> --------------------------------------------------------------------------------------------
>
> Key: HIVE-1394
> URL: https://issues.apache.org/jira/browse/HIVE-1394
> Project: Hadoop Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Namit Jain
> Assignee: Ning Zhang
> Fix For: 0.7.0
>
> Attachments: HIVE-1394.2.patch, HIVE-1394.patch
>
>
> Currently. purging looks at the hdfs time to see the last time the files got
> modified.
> It should look at the metastore property instead - these are facebook
> specific utilities, which do not require any changes to hive.
> However, in some cases, the operation might be performed by some housekeeping
> job, which should not modify the timestamp.
> Since, hive has no way of knowing the origin of the query, it might be a good
> idea to add a new hint which specifies that the
> operation is a cleanup operation, and the timestamp in the metastore need not
> be touched for that scenario.
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