cloud-fan commented on PR #44133:
URL: https://github.com/apache/spark/pull/44133#issuecomment-1895167158

   > if the value of bigIntCol exceeds the range of int, the result of 
try_cast(b.bigIntCol AS int) is null, and the result of a.intCol = 
try_cast(b.bigIntCol AS int) in the join condition is false
   
   This is wrong. The result will be null if one side of the binary comparison 
is null. In addition, it's very weird to optimize the plan in planner. 
Shouldn't we do it in an optimizer rule?


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