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https://issues.apache.org/jira/browse/FLINK-13032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16877507#comment-16877507
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jasine chen commented on FLINK-13032:
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[~yanghua] yes, it's helpful in our scene, we use session window to analysis
behavior, and we do need to record ,store and output states of each session
window
> Allow Access to Per-Window State in mergeable window ProcessWindowFunction
> ---------------------------------------------------------------------------
>
> Key: FLINK-13032
> URL: https://issues.apache.org/jira/browse/FLINK-13032
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream
> Affects Versions: 1.8.0
> Reporter: jasine chen
> Priority: Major
>
> access to per-window state is allowed in non-merging windows, but it's
> necessary to access per-window state in mergeable windows
>
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