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