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https://issues.apache.org/jira/browse/FLINK-23031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17365306#comment-17365306
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Aitozi commented on FLINK-23031:
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In flink sql, we can use EmitStrategy to set an early or late trigger with
delay . It will generate a processing time trigger at runtime.
We notice that the default processing timer is triggered periodically, which
means that if one group key comes only once in a window lifetime, it will be
triggered every delay time passed , no matter whether the data of group key
comes or not. It will generated much timer , but the trigger result has not
changed.
So I think we can add an option to support trigger window periodic or
non_periodic.
> Support to emit window result with periodic or non_periodic
> -----------------------------------------------------------
>
> Key: FLINK-23031
> URL: https://issues.apache.org/jira/browse/FLINK-23031
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Planner
> Reporter: Aitozi
> Priority: Major
>
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