[jira] [Created] (FLINK-14275) Window Aggregate function support a RichFunction

[Shang Yuanchun (Jira)]

hailong wang created FLINK-14275:
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             Summary: Window Aggregate function support a RichFunction
                 Key: FLINK-14275
                 URL: https://issues.apache.org/jira/browse/FLINK-14275
             Project: Flink
          Issue Type: Improvement
          Components: API / DataStream
    Affects Versions: 1.9.0
            Reporter: hailong wang
             Fix For: 1.10.0


Now, window aggregate function cannot be a RichFunction. In other words, open function can not be invoked and  runtimeContext cannot be fetched in RichAggregateFunction. 



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