Github user mgaido91 commented on the issue:

    https://github.com/apache/spark/pull/20750
  
    sorry for the basic question, but I don't see where it is added the switch 
between the evaluated and the generated version. Maybe I am just missing 
something since I am not an expert on how Spark switches between the execution 
modes, but I expected that in the `UnsafeProjection.create` there would have 
been a check whether to use one or the other. Like this it looks to me that the 
newly added class in actually never used in the codebase, other than in the 
tests. Am I missing something? Thanks.


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