alamb opened a new pull request, #7759:
URL: https://github.com/apache/arrow-datafusion/pull/7759

   ## Which issue does this PR close?
   
   N/A
   
   ## Rationale for this change
   @comphead  liked the ASCII art 
(https://github.com/apache/arrow-datafusion/pull/7747#issuecomment-1749116468) 
:) -- but seriously I would like to make it easier for DataFusion to be used -- 
both the specifics of how DataFusion works as well as more general database 
principles. 
   
   ## What changes are included in this PR?
   1. Updated docs for `TableProvider::scan`, including details about filter, 
projection and limit pushdown (with a diagram!)
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   ## Are these changes tested?
   doc tests
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   ## Are there any user-facing changes?
   
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