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https://issues.apache.org/jira/browse/TAJO-1194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14232682#comment-14232682
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ASF GitHub Bot commented on TAJO-1194:
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Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/254#issuecomment-65362838
LGTM +1
> 'INSERT OVERWRITE .. SELECT' does not remove existing data when result is
> empty.
> --------------------------------------------------------------------------------
>
> Key: TAJO-1194
> URL: https://issues.apache.org/jira/browse/TAJO-1194
> Project: Tajo
> Issue Type: Bug
> Components: distributed query plan
> Reporter: Hyunsik Choi
> Assignee: Jaehwa Jung
> Priority: Critical
> Fix For: 0.9.1
>
>
> *Background*
> {{INSERT OVERWRITE INTO XXX SELECT ... FROM Y}} overwrites only the
> partitions which corresponds to the query results. If the query result is
> empty, all partitions should be removed.
> *Problem*
> The current implementation does not remove any partition if the query result
> is empty.
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