ygf11 commented on issue #5022:
URL: 
https://github.com/apache/arrow-datafusion/issues/5022#issuecomment-1407581695

   > Other physicalexec have the same behavior?
   
   I don't know if there is other physical plan has the same behavior.
   but maybe executing the same partition one more time is not a good idea, it 
will waste a lot of time, a better way is to cache the result(`OnceFut`), or 
only call once.
   
   `NestedLoopJoinExec` will sometimes build-left, and sometimes build-right 
now, currently they are using the same logic, the right way is  to give 
`build-left` a logic to handle join, and give `build-right` another logic.
   
   The bug of example is the case of `build-right`, I see the 
`NestedLoopJoinStream` is using `build-left` logic.
   
   I think maybe the it is an another cause. @liukun4515 @alamb 
   


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