[jira] [Created] (FLINK-20706) Separate the implementation of BatchExecUnion and StreamExecUnion

[Shang Yuanchun (Jira)]

godfrey he created FLINK-20706:
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             Summary: Separate the implementation of BatchExecUnion and StreamExecUnion
                 Key: FLINK-20706
                 URL: https://issues.apache.org/jira/browse/FLINK-20706
             Project: Flink
          Issue Type: Sub-task
            Reporter: godfrey he






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