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https://issues.apache.org/jira/browse/FLINK-2819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14946820#comment-14946820
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ASF GitHub Bot commented on FLINK-2819:
---------------------------------------

Github user aljoscha commented on the pull request:

    https://github.com/apache/flink/pull/1232#issuecomment-146192026
  
    Subsumed by #1238 


> Add Windowed Join/CoGroup Operator Based on Tagged Union
> --------------------------------------------------------
>
>                 Key: FLINK-2819
>                 URL: https://issues.apache.org/jira/browse/FLINK-2819
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Streaming
>            Reporter: Aljoscha Krettek
>            Assignee: Aljoscha Krettek
>             Fix For: 0.10
>
>
> This will add a Join/CoGroup operation that reuses the new windowing code. 
> The implementation should be similar to how a join can be implemented on 
> MapReduce using tags for the two input side and then pulling them apart again 
> in the reduce operation.



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