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https://issues.apache.org/jira/browse/FLINK-8690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16394806#comment-16394806
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Rong Rong commented on FLINK-8690:
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Sweet. Thank you [~hequn8128]!
I am still a bit skeptical putting a "LOGICAL_RULESET" which is not entirely 
logical, I guess I will receive more feedback once the PR is out. :-P
Much appreciate the feedback and suggestion Hequn.

> Update logical rule set to generate FlinkLogicalAggregate explicitly allow 
> distinct agg on DataStream
> -----------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-8690
>                 URL: https://issues.apache.org/jira/browse/FLINK-8690
>             Project: Flink
>          Issue Type: Sub-task
>            Reporter: Rong Rong
>            Assignee: Rong Rong
>            Priority: Major
>
> Currently, *FlinkLogicalAggregate / FlinkLogicalWindowAggregate* does not 
> allow distinct aggregate.
> We are proposing to reuse distinct aggregate codegen work designed for 
> *FlinkLogicalOverAggregate*, to support unbounded distinct aggregation on 
> datastream as well.



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