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https://issues.apache.org/jira/browse/FLINK-19059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timo Walther updated FLINK-19059:
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    Priority: Major  (was: Not a Priority)

> Support to consume retractions for OVER WINDOW operator
> -------------------------------------------------------
>
>                 Key: FLINK-19059
>                 URL: https://issues.apache.org/jira/browse/FLINK-19059
>             Project: Flink
>          Issue Type: New Feature
>          Components: Table SQL / Planner
>            Reporter: Jark Wu
>            Assignee: Bonnie Varghese
>            Priority: Major
>              Labels: auto-deprioritized-major, auto-deprioritized-minor
>
> Currently, OVER WINDOW in streaming SQL only support to consume insert-only 
> stream and doesn't support to consume retractions (i.e. contains 
> UPDATE/DELETE messages). This results in OVER WINDOW can't be used to follow 
> after unbounded group by or streaming join. 



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