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https://issues.apache.org/jira/browse/FLINK-9470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16495069#comment-16495069
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ASF GitHub Bot commented on FLINK-9470:
---------------------------------------
Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/6097
`ProcessWindowFunction` has a `key` parameter already.
> Allow querying the key in KeyedProcessFunction
> ----------------------------------------------
>
> Key: FLINK-9470
> URL: https://issues.apache.org/jira/browse/FLINK-9470
> Project: Flink
> Issue Type: Improvement
> Components: DataStream API
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
> Priority: Major
> Fix For: 1.6.0
>
>
> {{KeyedProcessFunction.OnTimerContext}} allows querying the key of the firing
> timer while {{KeyedProcessFunction.Context}} does not allow querying the key
> of the event we're currently processing.
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