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From "Fabian Hueske (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-3941) Add support for UNION (with duplicate elimination)
Date Fri, 20 May 2016 09:27:12 GMT
Fabian Hueske created FLINK-3941:

             Summary: 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
            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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