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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4476) Enhance Union-All operator for dealing with empty left input or empty both inputs
Date Sat, 12 Mar 2016 19:31:06 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15191800#comment-15191800
] 

ASF GitHub Bot commented on DRILL-4476:
---------------------------------------

Github user hsuanyi commented on the pull request:

    https://github.com/apache/drill/pull/407#issuecomment-195794797
  
    Comments were added to the code; Also passed all the pre commit test. Can you help commit
this patch ?



> Enhance Union-All operator for dealing with empty left input or empty both inputs
> ---------------------------------------------------------------------------------
>
>                 Key: DRILL-4476
>                 URL: https://issues.apache.org/jira/browse/DRILL-4476
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Relational Operators
>            Reporter: Sean Hsuan-Yi Chu
>            Assignee: Sean Hsuan-Yi Chu
>
> Union-All operator does not deal with the situation where left side comes from empty
source.
> Due to DRILL-2288's enhancement for empty sources, Union-All operator now can be allowed
to support this scenario.



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