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https://issues.apache.org/jira/browse/FLINK-10594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16720047#comment-16720047
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Dawid Wysakowicz commented on FLINK-10594:
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Hi [~wind_ljy],
Actually [FLINK-7599] tracks effort of introducing aggregate functions such as 
{{AVG}}. Another thing is that we actually do not support {{PREV/NEXT}}. Last 
thing this has to be carefully designed and thought through on the cep side as 
it has influences the {{AfterMatchSkip}} strategy.

> Support SUBSETS
> ---------------
>
>                 Key: FLINK-10594
>                 URL: https://issues.apache.org/jira/browse/FLINK-10594
>             Project: Flink
>          Issue Type: Sub-task
>          Components: CEP, Table API & SQL
>            Reporter: Dawid Wysakowicz
>            Assignee: Jiayi Liao
>            Priority: Major
>




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