[jira] [Assigned] (FLINK-3943) Add support for EXCEPT (set minus)

["Ivan Mushketyk (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-3943?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ivan Mushketyk reassigned FLINK-3943:
-------------------------------------

    Assignee: Ivan Mushketyk

> Add support for EXCEPT (set minus)
> ----------------------------------
>
>                 Key: FLINK-3943
>                 URL: https://issues.apache.org/jira/browse/FLINK-3943
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table API
>    Affects Versions: 1.1.0
>            Reporter: Fabian Hueske
>            Assignee: Ivan Mushketyk
>            Priority: Minor
>
> Currently, the Table API and SQL do not support EXCEPT.
> EXCEPT can be executed as a coGroup on all fields that forwards records of the first input if the second input is empty.
> In order to add support for EXCEPT to the Table API and SQL we need to:
> - Implement a {{DataSetMinus}} class that translates an EXCEPT into a DataSet API program using a coGroup on all fields.
> - Implement a {{DataSetMinusRule}} that translates a Calcite {{LogicalMinus}} into a {{DataSetMinus}}.
> - Extend the Table API (and validation phase) to provide an except() method.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)