englefly opened a new pull request, #18744:
URL: https://github.com/apache/doris/pull/18744

   # Proposed changes
   We need the sender and receiver number to estimate the cost broadcast and 
shuffle.
   But we do not have these numbers under current framework.
   So we assume the sender number is equal to the receiver number. And then we 
estimate the cost of sender as the cost of distribute node.
   
   Issue Number: close #xxx
   
   ## Problem summary
   
   Describe your changes.
   
   ## Checklist(Required)
   
   * [ ] Does it affect the original behavior
   * [ ] Has unit tests been added
   * [ ] Has document been added or modified
   * [ ] Does it need to update dependencies
   * [ ] Is this PR support rollback (If NO, please explain WHY)
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   
   


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