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Minor: Improve TableProvider document, and add ascii art #7759

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merged 2 commits into from
Oct 7, 2023

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alamb
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@alamb alamb commented Oct 6, 2023

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?

  1. Updated docs for 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

/// The table provider will be usually responsible of grouping
/// the source data into partitions that can be efficiently
/// parallelized or distributed.
/// Create an [`ExecutionPlan`] for scanning the table with optionally
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Awesome

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@comphead comphead left a comment

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lgtm

@github-actions github-actions bot added the core Core DataFusion crate label Oct 7, 2023
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alamb commented Oct 7, 2023

Thank you @liukun4515 and @comphead

@alamb alamb merged commit fb37105 into apache:main Oct 7, 2023
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@alamb alamb added documentation Improvements or additions to documentation devrel labels Oct 7, 2023
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3 participants