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https://issues.apache.org/jira/browse/FLINK-21881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17306069#comment-17306069
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Jark Wu commented on FLINK-21881:
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Hi [~gonglinglei], I have been working on this and will submit a pull request
soon.
> Support local global optimization for window aggregation
> --------------------------------------------------------
>
> Key: FLINK-21881
> URL: https://issues.apache.org/jira/browse/FLINK-21881
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: Jark Wu
> Priority: Major
>
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