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https://issues.apache.org/jira/browse/FLINK-13032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16880375#comment-16880375
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Aljoscha Krettek commented on FLINK-13032:
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We can try it, but it would only work for types of state that naturally support
merging, i.e. {{ReducingState}} and {{AggregatingState}}.
> 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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