[jira] [Created] (FLINK-19625) Introduce multi-input exec node

[Caizhi Weng (Jira)]

Caizhi Weng created FLINK-19625:
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             Summary: Introduce multi-input exec node
                 Key: FLINK-19625
                 URL: https://issues.apache.org/jira/browse/FLINK-19625
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / Planner
            Reporter: Caizhi Weng
             Fix For: 1.12.0


For multi-input to work in Blink planner, we should first introduce multi-input 
exec node in the planner.



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