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https://issues.apache.org/jira/browse/HAWQ-239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15049983#comment-15049983
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ASF GitHub Bot commented on HAWQ-239:
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Github user yaoj2 commented on the pull request:
https://github.com/apache/incubator-hawq/pull/175#issuecomment-163478378
+1
> Reduce the call times of GpPolicy to improve performance on scan empty table.
> -----------------------------------------------------------------------------
>
> Key: HAWQ-239
> URL: https://issues.apache.org/jira/browse/HAWQ-239
> Project: Apache HAWQ
> Issue Type: Improvement
> Components: Core
> Reporter: Hubert Zhang
> Assignee: Hubert Zhang
>
> in get_block_locations_and_claculte_table_size(), GpPolicy is called twice
> for each relation, we need to reduce it to zero
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