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https://issues.apache.org/jira/browse/FLINK-9740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16712219#comment-16712219
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xuqianjin commented on FLINK-9740:
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hi [~twalthr] I'm sorry that I found some details need to be considered when I
looked at them last night, so I deleted the uploaded attachment. I plan to
resubmit a design today
thanks
qianjin
> Support group windows over intervals of months
> -----------------------------------------------
>
> Key: FLINK-9740
> URL: https://issues.apache.org/jira/browse/FLINK-9740
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Affects Versions: 1.5.0
> Reporter: Timo Walther
> Assignee: Renjie Liu
> Priority: Major
> Labels: pull-request-available
>
> Currently, time-based group windows can be defined using intervals of
> milliseconds such as {{.window(Tumble over 10.minutes on 'rowtime as 'w)}}.
> For some use cases it might useful to define windows of months (esp. in
> event-time) that work even with leap years and other special time cases.
> The following should be supported in Table API & SQL:
> {{.window(Tumble over 1.month on 'rowtime as 'w)}}
> {{.window(Tumble over 1.quarter on 'rowtime as 'w)}}
> {{.window(Tumble over 1.year on 'rowtime as 'w)}}
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