xzj7019 opened a new pull request, #23423:
URL: https://github.com/apache/doris/pull/23423

   …m 1.2 to 2.0
   
   When upgrading from 1.2 to 2.0, the default value of parameter 
broadcast_right_table_scale_factor may not be upgraded from old default value 
10.0 to new default 0.0, which will cause the broadcast join behavior 
unexpected and may have a big performance impact. This pr will force to reset 
the value to new default value 0.0, to make sure the behavior correct.
   
   Issue Number: close #xxx
   
   <!--Describe your changes.-->
   
   ## 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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