Minor: Improve TableProvider document, and add ascii art #7759
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Which issue does this PR close?
N/A
Rationale for this change
@comphead liked the ASCII art (#7747 (comment)) :) -- 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?
TableProvider::scan
, including details about filter, projection and limit pushdown (with a diagram!)Are these changes tested?
doc tests
Are there any user-facing changes?
Docs only