morrySnow opened a new pull request, #9991:
URL: https://github.com/apache/incubator-doris/pull/9991

   # Proposed changes
   
   Issue Number: close #9952 
   
   ## Problem Summary:
   
   In SetOperationNode we do passthrough, if we child output is same with 
itself output. In method `isChildPassthrough` we only consider memory layout. 
When we use vectorized engine, we need to use SlotDesc offset in TupleDesc 
instead of memory layout to check whether  pass-through can be performed
   
   ## Checklist(Required)
   
   1. Does it affect the original behavior: No
   2. Has unit tests been added: No
   3. Has document been added or modified: No Need
   4. Does it need to update dependencies: No
   5. Are there any changes that cannot be rolled back:No
   
   ## Further comments
   
   Add UT and regression-test later.
   


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