[jira] [Created] (FLINK-21041) Introduce ExecNodeGraph to wrap the ExecNode topology

[Shang Yuanchun (Jira)]

godfrey he created FLINK-21041:
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             Summary: Introduce ExecNodeGraph to wrap the ExecNode topology
                 Key: FLINK-21041
                 URL: https://issues.apache.org/jira/browse/FLINK-21041
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / Planner
            Reporter: godfrey he
             Fix For: 1.13.0


Currently, we use {{List<ExecNode<?>}} to represent the {{ExecNode}} topology, as we will introduce more features (such as serialize/deserialize {{ExecNode}}s), It's better we can introduce an unified class to represent the topology.



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