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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 Thu, 10 Mar 2016 01:02:40 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15188421#comment-15188421
] 

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

Github user hsuanyi commented on the pull request:

    https://github.com/apache/drill/pull/407#issuecomment-194598924
  
    @amansinha100 I consolidated the two logic into one:
    https://github.com/hsuanyi/incubator-drill/blob/DRILL-4476/exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/union/UnionAllRecordBatch.java#L597
    
    Can you help review again? Thanks.


> 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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