YuvalItzchakov commented on pull request #15307:
URL: https://github.com/apache/flink/pull/15307#issuecomment-812509449


   > > OK, I see what you're saying. Is there a reason though that the 
`FlinkLogicalCalc` is being generated twice?
   > 
   > In optimization, we alway build a new node rather than reuse the origin 
node. @godfreyhe is more familar with this.
   > 
   > > Do you think we can get this into 1.13? This is a critical fix for me.
   > 
   > I am not sure about this... It more depends on you.
   
   OK, I'm waiting on your comments so we can get this finalized.


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