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https://issues.apache.org/jira/browse/FLINK-6163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16247295#comment-16247295
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ASF GitHub Bot commented on FLINK-6163:
---------------------------------------
Github user alpinegizmo commented on a diff in the pull request:
https://github.com/apache/flink/pull/4992#discussion_r150194036
--- Diff: docs/dev/stream/operators/windows.md ---
@@ -978,6 +978,24 @@ input
</div>
</div>
+### Using per-window state in ProcessWindowFunction
+
+In addition to accessing keyed state (as any rich function can) a
`ProcessWindowFunction` can
+also use keyed state that is scoped to the window that the function is
currently processing. The are
--- End diff --
The are --> There are
> Document per-window state in ProcessWindowFunction
> --------------------------------------------------
>
> Key: FLINK-6163
> URL: https://issues.apache.org/jira/browse/FLINK-6163
> Project: Flink
> Issue Type: Improvement
> Components: DataStream API, Documentation
> Reporter: Aljoscha Krettek
> Assignee: Aljoscha Krettek
> Priority: Blocker
> Fix For: 1.4.0
>
>
> The current windowing documentation mostly describes {{WindowFunction}} and
> treats {{ProcessWindowFunction}} as an afterthought. We should reverse that
> and also document the new per-key state that is only available to
> {{ProcessWindowFunction}}.
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