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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3941) Add support for UNION (with duplicate elimination)
Date Wed, 25 May 2016 08:37:12 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15299684#comment-15299684
] 

ASF GitHub Bot commented on FLINK-3941:
---------------------------------------

Github user yjshen commented on the pull request:

    https://github.com/apache/flink/pull/2025#issuecomment-221508839
  
    @fhueske would you please take another look? Thanks.


> Add support for UNION (with duplicate elimination)
> --------------------------------------------------
>
>                 Key: FLINK-3941
>                 URL: https://issues.apache.org/jira/browse/FLINK-3941
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API
>    Affects Versions: 1.1.0
>            Reporter: Fabian Hueske
>            Assignee: Yijie Shen
>            Priority: Minor
>
> Currently, only UNION ALL is supported by Table API and SQL.
> UNION (with duplicate elimination) can be supported by applying a {{DataSet.distinct()}}
after the union on all fields. This issue includes:
> - Extending {{DataSetUnion}}
> - Relaxing {{DataSetUnionRule}} to translated non-all unions.
> - Extend the Table API with union() method.



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