[jira] [Created] (FLINK-20856) Separate the implementation of stream window aggregate nodes

[godfrey he (Jira)]

godfrey he created FLINK-20856:
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             Summary: Separate the implementation of stream window aggregate 
nodes
                 Key: FLINK-20856
                 URL: https://issues.apache.org/jira/browse/FLINK-20856
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / Planner
            Reporter: godfrey he
             Fix For: 1.13.0


Stream window aggregate nodes include:
StreamExecGroupWindowAggregate
StreamExecGroupWindowTableAggregate
StreamExecPythonGroupWindowAggregate



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