alamb opened a new pull request, #11678:
URL: https://github.com/apache/datafusion/pull/11678

   (Draft as I need to write tests for this)
   
   ## Which issue does this PR close?
   
   Closes https://github.com/apache/datafusion/issues/11675
   
   ## Rationale for this change
   
   See https://github.com/apache/datafusion/issues/11675 -- the PushDown sort 
optimizer was incorrectly pushing down sorts
   
   This change fixes a problem we were seeing in our tests downstream in 
influxdb iox
   
   ## What changes are included in this PR?
   
   1. Don't push down sorts if doing so would violate the ordering requirements
   
   ## Are these changes tested?
   TBD
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   ## Are there any user-facing changes?
   
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