222 lines
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HTML
222 lines
10 KiB
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<meta name="description" content="API documentation for the Rust `mentat_query_projector` crate.">
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<meta name="keywords" content="rust, rustlang, rust-lang, mentat_query_projector">
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<title>mentat_query_projector - Rust</title>
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<div class="sidebar-menu">☰</div>
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<p class='location'>Crate mentat_query_projector</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#modules">Modules</a></li><li><a href="#structs">Structs</a></li><li><a href="#enums">Enums</a></li><li><a href="#traits">Traits</a></li><li><a href="#functions">Functions</a></li><li><a href="#types">Type Definitions</a></li></ul></div><p class='location'></p><script>window.sidebarCurrent = {name: 'mentat_query_projector', ty: 'mod', relpath: '../'};</script></div>
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autocomplete="off"
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placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
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type="search">
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</form>
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</nav>
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<section id='main' class="content">
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<h1 class='fqn'><span class='in-band'>Crate <a class="mod" href=''>mentat_query_projector</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../src/mentat_query_projector/lib.rs.html#11-569' title='goto source code'>[src]</a></span></h1>
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<h2 id='modules' class='section-header'><a href="#modules">Modules</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="mod" href="translate/index.html"
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title='mod mentat_query_projector::translate'>translate</a></td>
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<td class='docblock-short'>
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</td>
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</tr></table><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.CombinedProjection.html"
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title='struct mentat_query_projector::CombinedProjection'>CombinedProjection</a></td>
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<td class='docblock-short'>
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<p>Combines the things you need to turn a query into SQL and turn its results into
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<code>QueryResults</code>: SQL-related projection information (<code>DISTINCT</code>, columns, etc.) and
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a Datalog projector that turns SQL into structures.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.ConstantProjector.html"
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title='struct mentat_query_projector::ConstantProjector'>ConstantProjector</a></td>
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<td class='docblock-short'>
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<p>A projector that produces a <code>QueryResult</code> containing fixed data.
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Takes a boxed function that should return an empty result set of the desired type.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.QueryOutput.html"
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title='struct mentat_query_projector::QueryOutput'>QueryOutput</a></td>
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<td class='docblock-short'>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="struct" href="struct.RelResult.html"
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title='struct mentat_query_projector::RelResult'>RelResult</a></td>
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<td class='docblock-short'>
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<p>The result you get from a 'rel' query, like:</p>
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</td>
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</tr></table><h2 id='enums' class='section-header'><a href="#enums">Enums</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="enum" href="enum.QueryResults.html"
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title='enum mentat_query_projector::QueryResults'>QueryResults</a></td>
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<td class='docblock-short'>
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</td>
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</tr></table><h2 id='traits' class='section-header'><a href="#traits">Traits</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="trait" href="trait.BindingTuple.html"
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title='trait mentat_query_projector::BindingTuple'>BindingTuple</a></td>
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<td class='docblock-short'>
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<p>A <code>BindingTuple</code> is any type that can accommodate a Mentat tuple query result of fixed length.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="trait" href="trait.Projector.html"
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title='trait mentat_query_projector::Projector'>Projector</a></td>
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<td class='docblock-short'>
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</td>
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</tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="fn" href="fn.projected_column_for_var.html"
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title='fn mentat_query_projector::projected_column_for_var'>projected_column_for_var</a></td>
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<td class='docblock-short'>
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<p>Return the projected column -- that is, a value or SQL column and an associated name -- for a
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given variable. Also return the type.
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Callers are expected to determine whether to project a type tag as an additional SQL column.</p>
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</td>
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</tr>
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<tr class=' module-item'>
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<td><a class="fn" href="fn.query_projection.html"
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title='fn mentat_query_projector::query_projection'>query_projection</a></td>
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<td class='docblock-short'>
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<p>Compute a suitable SQL projection for an algebrized query.
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This takes into account a number of things:</p>
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</td>
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</tr></table><h2 id='types' class='section-header'><a href="#types">Type Definitions</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class="type" href="type.StructuredRelResult.html"
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title='type mentat_query_projector::StructuredRelResult'>StructuredRelResult</a></td>
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<td class='docblock-short'>
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</td>
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</tr></table></section>
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<h1 class="hidden">Help</h1>
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<h2>Keyboard Shortcuts</h2>
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<dl>
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<dt><kbd>?</kbd></dt>
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<h2>Search Tricks</h2>
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<code>fn:</code>) to restrict the search to a given type.
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<p>
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Accepted types are: <code>fn</code>, <code>mod</code>,
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<code>struct</code>, <code>enum</code>,
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<code>trait</code>, <code>type</code>, <code>macro</code>,
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and <code>const</code>.
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</p>
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<p>
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Search functions by type signature (e.g.
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<code>vec -> usize</code> or <code>* -> vec</code>)
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