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From "Aviem Zur (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-1806) a new option `asLeftOuterJoin` for CoGroupByKey
Date Mon, 27 Mar 2017 04:51:41 GMT

    [ https://issues.apache.org/jira/browse/BEAM-1806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15942642#comment-15942642
] 

Aviem Zur commented on BEAM-1806:
---------------------------------

Have you taken a look at [join-library|https://github.com/apache/beam/blob/master/sdks/java/extensions/join-library/src/main/java/org/apache/beam/sdk/extensions/joinlibrary/Join.java]?

> a new option `asLeftOuterJoin` for CoGroupByKey
> -----------------------------------------------
>
>                 Key: BEAM-1806
>                 URL: https://issues.apache.org/jira/browse/BEAM-1806
>             Project: Beam
>          Issue Type: Improvement
>          Components: sdk-java-core
>            Reporter: Xu Mingmin
>            Assignee: Xu Mingmin
>
> Similar as BEAM-1805, restrict it as left-outer-join. 
> The first {{PCollection}} is used as the key, if it's empty, output is ignored.



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