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Posted to issues@flink.apache.org by "Aljoscha Krettek (JIRA)" <ji...@apache.org> on 2017/04/03 12:35:42 UTC

[jira] [Updated] (FLINK-5094) Support RichReduceFunction and RichFoldFunction as incremental window aggregation functions

     [ https://issues.apache.org/jira/browse/FLINK-5094?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aljoscha Krettek updated FLINK-5094:
------------------------------------
    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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