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https://issues.apache.org/jira/browse/FLINK-22128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17766177#comment-17766177
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Jingsong Lee commented on FLINK-22128:
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[~337361...@qq.com] I think yes, this still should be done. But I don't have
time to research more details. CC [~lincoln.86xy]
> Window aggregation should have unique keys
> ------------------------------------------
>
> Key: FLINK-22128
> URL: https://issues.apache.org/jira/browse/FLINK-22128
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Reporter: Jingsong Lee
> Priority: Not a Priority
> Labels: auto-deprioritized-major, auto-deprioritized-minor,
> auto-unassigned
>
> We should add match method in {{FlinkRelMdUniqueKeys for
> StreamPhysicalWindowAggregate}}
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