[jira] [Created] (FLINK-20513) Separate the implementation of BatchExecExchange and StreamExecExchange

[Shang Yuanchun (Jira)]

godfrey he created FLINK-20513:
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             Summary: Separate the implementation of BatchExecExchange and StreamExecExchange
                 Key: FLINK-20513
                 URL: https://issues.apache.org/jira/browse/FLINK-20513
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / Planner
            Reporter: godfrey he


The issue will separate the implementation of Batch(/Stream)ExecExchange, we will introduce Batch(/Stream)PhysicalExchange which will extend {{FlinkPhysicalRel}}, {{BatchExecExchange }} will be moved into `nodes.exec.batch` package and will implement ExecNode for Exchange, {{StreamExecExchange}} will be moved into `nodes.exec.stream` package.



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