tustvold commented on issue #3620:
URL: https://github.com/apache/arrow-rs/issues/3620#issuecomment-1591214105

   > For example the (non null) values of 
[or_kleen](https://docs.rs/arrow/latest/arrow/compute/fn.or_kleene.html)'s 
depend on the null values of its input
   
   A value not being in the selection mask implies **it is going to be 
discarded regardless of the output of the current kernel**. I'm therefore not 
sure why it would ever matter? What am I missing here?


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