XieJiann opened a new pull request, #24589:
URL: https://github.com/apache/doris/pull/24589

   ## Proposed changes
   
   In the context of reorder join, when a new plan is generated, it may include 
a project operation. In this case, the newly generated join root and the 
original join root will no longer be in the same group. To avoid 
inconsistencies in the statistics between these two groups, we keep the child 
group's row count unchanged when the parent group expression is a project 
operation.
   
   ## Further comments
   
   If this is a relatively large or complex change, kick off the discussion at 
[[email protected]](mailto:[email protected]) by explaining why you 
chose the solution you did and what alternatives you considered, etc...
   
   


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