findepi commented on issue #17064:
URL: https://github.com/apache/datafusion/issues/17064#issuecomment-3185726218

   For this having partial ordering, or ordering by a partial projection from 
an Expr, should be sufficient.
   
   However, there remains a problem of discrepancy between PartialOrd and 
PartialEq/Eq impls.
   We can fix the PartialOrd  implementation by consulting Eq. Maybe something 
like 
   
   - https://github.com/apache/datafusion/pull/17182
   
   


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