[jira] [Created] (FLINK-20857) Separate the implementation of batch window aggregate nodes

[Shang Yuanchun (Jira)]

godfrey he created FLINK-20857:
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             Summary: Separate the implementation of batch window aggregate nodes
                 Key: FLINK-20857
                 URL: https://issues.apache.org/jira/browse/FLINK-20857
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / Planner
            Reporter: godfrey he
             Fix For: 1.13.0


Batch window aggregate nodes include:
BatchExecHashWindowAggregate
BatchExecLocalHashWindowAggregate
BatchExecSortWindowAggregate
BatchExecLocalSortWindowAggregate
BatchExecPythonGroupWindowAggregate



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