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https://issues.apache.org/jira/browse/FLINK-5094?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aljoscha Krettek updated FLINK-5094:
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Component/s: (was: Streaming)
> 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: DataStream API
> Affects Versions: 1.2.0, 1.1.3
> Reporter: Fabian Hueske
>
> 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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