[jira] [Closed] (FLINK-3941) Add support for UNION (with duplicate elimination)

["Fabian Hueske (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-3941?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fabian Hueske closed FLINK-3941.
--------------------------------
       Resolution: Implemented
    Fix Version/s: 1.1.0

Implemented with ef5832d8f5867826a60f87e2fcaef912dc2950f6

> 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
>             Fix For: 1.1.0
>
>
> 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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