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Posted to issues@flink.apache.org by "Hequn Cheng (JIRA)" <ji...@apache.org> on 2018/02/25 04:36:00 UTC

[jira] [Commented] (FLINK-8690) Update logical rule set to generate FlinkLogicalAggregate explicitly allow distinct agg on DataStream

    [ https://issues.apache.org/jira/browse/FLINK-8690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16375920#comment-16375920 ] 

Hequn Cheng commented on FLINK-8690:
------------------------------------

Hi, currently, {{FlinkLogicalWindowAggregate}} doesn't support distinct aggregate either. Distinct aggregates are filtered in \{{LogicalWindowAggregateRule}}, so this issue should also take it into consideration.

> 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* does not allow distinct aggregate.
> We are proposing to reuse distinct aggregate codegen work designed for *FlinkLogicalOverAggregate* / *FlinkLogicalWindowAggregate*, to support unbounded distinct aggregation on datastream as well.



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