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https://issues.apache.org/jira/browse/FLINK-5094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17328870#comment-17328870
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Flink Jira Bot commented on FLINK-5094:
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This major issue is unassigned and itself and all of its Sub-Tasks have not
been updated for 30 days. So, it has been labeled "stale-major". If this ticket
is indeed "major", please either assign yourself or give an update. Afterwards,
please remove the label. In 7 days the issue will be deprioritized.
> Support RichReduceFunction and RichFoldFunction as incremental window
> aggregation functions
> -------------------------------------------------------------------------------------------
>
> Key: FLINK-5094
> URL: https://issues.apache.org/jira/browse/FLINK-5094
> Project: Flink
> Issue Type: Improvement
> Components: API / DataStream
> Affects Versions: 1.1.3, 1.2.0
> Reporter: Fabian Hueske
> Priority: Major
> Labels: stale-major
>
> Support {{RichReduceFunction}} and {{RichFoldFunction}} as incremental window
> aggregation functions in order to initialize the functions via {{open()}}.
> The main problem is that we do not want to provide the full power of
> {{RichFunction}} for incremental aggregation functions, such as defining own
> operator state. This could be achieve by providing some kind of
> {{RestrictedRuntimeContext}}.
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