blinding-pixels commented on PR #23627:
URL: https://github.com/apache/datafusion/pull/23627#issuecomment-5006820623

   Apologies, my bad on the length. 
   
   Here is the short version-
   
   I agree on the assertion, split it by expected outcome so a Hash row can't 
pass with a RoundRobin. Reuse asserts zero `RepartitionExec`, Hash asserts 
exactly one and that it's Hash.
   
   On the trim, mutations say 4/5/6 are safe but 7, 13, and 14 are each the 
only test catching a specific branch.
   
   A reason I hesitated on the trim is that the neutral matrix enables the 
Range opt-in itself, so it stays green no matter what a production operator 
does. Only the SLTs catch that.
   
   Happy to push that and paste the mutation detail if you want it.
   
   The previous comment wasn't auto-generated but I did let an LLM write it up 
and didn't cut it down before posting.
   


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