avantgardnerio opened a new pull request, #17347:
URL: https://github.com/apache/datafusion/pull/17347

   ## Which issue does this PR close?
   
   - Closes #17346.
   
   ## Rationale for this change
   
   We would like plans with window functions to go faster.
   
   ## What changes are included in this PR?
   
   A proof-of-concept level optimizer rule push limits past some window 
functions.
   
   ## Are these changes tested?
   
   So far only by the existing sqllogictest suite.
   
   ## Are there any user-facing changes?
   
   Queries with window functions may go faster, particularly if the 
`TableProvider` supports TopK pushdown.


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