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Posted to issues@flink.apache.org by "Jiayi Liao (Jira)" <ji...@apache.org> on 2019/10/29 01:12:00 UTC

[jira] [Closed] (FLINK-13854) Support Aggregating in Join and CoGroup

     [ https://issues.apache.org/jira/browse/FLINK-13854?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jiayi Liao closed FLINK-13854.
------------------------------
    Resolution: Invalid

> Support Aggregating in Join and CoGroup
> ---------------------------------------
>
>                 Key: FLINK-13854
>                 URL: https://issues.apache.org/jira/browse/FLINK-13854
>             Project: Flink
>          Issue Type: New Feature
>          Components: API / DataStream
>    Affects Versions: 1.9.0
>            Reporter: Jiayi Liao
>            Priority: Major
>
> In WindowStream we can use  windowStream.aggregate(AggregateFunction, WindowFunction) to aggregate input records in real-time.   
> I think we should support similar api in JoinedStreams and CoGroupStreams, because it's a very huge cost by storing the records log in state backend, especially when we don't need the specific records.



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