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Posted to commits@beam.apache.org by "Kenneth Knowles (JIRA)" <ji...@apache.org> on 2018/03/06 05:01:00 UTC

[jira] [Assigned] (BEAM-3721) UNION ALL should be implemented via Flatten

     [ https://issues.apache.org/jira/browse/BEAM-3721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kenneth Knowles reassigned BEAM-3721:
-------------------------------------

    Assignee:     (was: Kenneth Knowles)

> UNION ALL should be implemented via Flatten
> -------------------------------------------
>
>                 Key: BEAM-3721
>                 URL: https://issues.apache.org/jira/browse/BEAM-3721
>             Project: Beam
>          Issue Type: Improvement
>          Components: dsl-sql
>            Reporter: Kenneth Knowles
>            Priority: Major
>
> Currently, UNION ALL is implemented as an abstracted set operation that goes through CoGroupByKey, when a flatten will do. This is also incompatible with triggers that fire more than once.



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