[jira] [Commented] (BEAM-1797) add CoGroupByKey to chapter 'Using GroupByKey'

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-1797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15971476#comment-15971476 ] 

ASF GitHub Bot commented on BEAM-1797:
--------------------------------------

Github user XuMingmin closed the pull request at:

    https://github.com/apache/beam-site/pull/195


> add CoGroupByKey to chapter 'Using GroupByKey'  
> ------------------------------------------------
>
>                 Key: BEAM-1797
>                 URL: https://issues.apache.org/jira/browse/BEAM-1797
>             Project: Beam
>          Issue Type: Task
>          Components: website
>            Reporter: Xu Mingmin
>            Assignee: Xu Mingmin
>            Priority: Minor
>
> In https://beam.apache.org/documentation/programming-guide/#transforms-sideio, the chapter {{Using GroupByKey}} describes how to apply a GroupBy on one single {{PCollection}} with {{GroupByKey}}. 
> Would like to add the usage of {{CoGroupByKey}} which run on multiple {{PCollection}} s



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