Yicong-Huang commented on issue #4329:
URL: https://github.com/apache/texera/issues/4329#issuecomment-4145826622

   > Whether multiple links can go into the same port and whether an operator 
has two input ports are orthogonal.
   
   I don't think they are completely orthogonal, as "allow multiple links going 
to the same port"'s behavior is to implicitly union the data on those links 
together. 
   
   On the original proposal, "allow multiple links going to the same port", 
actually extending on this example, if we change the Union to Join or Diff, 
which has dependency between input ports, how to schedule this workflow? I need 
to think a bit more on this. 
   <img width="279" height="140" alt="Image" 
src="https://github.com/user-attachments/assets/8f859c30-6a33-4764-ac7c-5f28687f8c90";
 />
   
   


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