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https://issues.apache.org/jira/browse/HIVE-1768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928703#action_12928703
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Namit Jain commented on HIVE-1768:
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1 Question: Does add partition/drop partition change the transient_lastDdlTime
of the table ?
Looks like it does not (from the code) -
Is that the expected/correct semantics ?
> Update transident_lastDdlTime only if not specified
> ---------------------------------------------------
>
> Key: HIVE-1768
> URL: https://issues.apache.org/jira/browse/HIVE-1768
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Affects Versions: 0.7.0
> Reporter: Paul Yang
> Assignee: Paul Yang
> Attachments: HIVE-1768.1.patch
>
>
> Currently, whenever a table/partition is created/altered, the field
> 'transient_lastDdl' time is updated with the current timestamp. For normal
> operations, this is the desired behavior. However for some housekeeping
> tasks, it may be helpful if the user could keep the existing value (or set it
> to something different).
> One example where this is useful is if a partition is copied between
> clusters. If the last modified time were kept same after the initial copy, it
> would be easy to know if one partition were overwritten/updated by comparing
> timestamps.
> This patch alters the behavior of create/alter methods in the metastore API
> to update the timestamp only if it is not specified in the object.
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