[jira] [Closed] (FLINK-16844) Support retract message for StreamExecGroupWindowAggregate in blink planner

[Benchao Li (Jira)]

     [ 
https://issues.apache.org/jira/browse/FLINK-16844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Benchao Li closed FLINK-16844.
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    Resolution: Duplicate

> Support retract message for StreamExecGroupWindowAggregate in blink planner
> ---------------------------------------------------------------------------
>
>                 Key: FLINK-16844
>                 URL: https://issues.apache.org/jira/browse/FLINK-16844
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Planner
>            Reporter: Benchao Li
>            Priority: Major
>
> Currently the `WindowOperator` in blink planner actually supports retract 
> messages, however in StreamExecGroupWindowAggregate, we throws exception if 
> input is retract. IMO, we can remove this check and let 
> `StreamExecGroupWindowAggregate` support retract messages. This will enhance 
> the ability of blink planner very much.
>  
> cc [~jark]



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