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<p class='location'>Enum ColumnOrExpression</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#variants">Variants</a><div class="sidebar-links"><a href="#variant.Column">Column</a><a href="#variant.ExistingColumn">ExistingColumn</a><a href="#variant.Entid">Entid</a><a href="#variant.Integer">Integer</a><a href="#variant.Long">Long</a><a href="#variant.Value">Value</a><a href="#variant.NullableAggregate">NullableAggregate</a><a href="#variant.Expression">Expression</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-From%3CQueryValue%3E">From<QueryValue></a><a href="#impl-QueryFragment">QueryFragment</a></div></div><p class='location'><a href='index.html'>mentat_query_sql</a></p><script>window.sidebarCurrent = {name: 'ColumnOrExpression', ty: 'enum', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<h1 class='fqn'><span class='in-band'>Enum <a href='index.html'>mentat_query_sql</a>::<wbr><a class="enum" href=''>ColumnOrExpression</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a class='srclink' href='../src/mentat_query_sql/lib.rs.html#67-78' title='goto source code'>[src]</a></span></h1>
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<pre class='rust enum'>pub enum ColumnOrExpression {
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Column(<a class="struct" href="../mentat_query_algebrizer/types/struct.QualifiedAlias.html" title="struct mentat_query_algebrizer::types::QualifiedAlias">QualifiedAlias</a>),
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ExistingColumn(<a class="type" href="../mentat_query_sql/type.Name.html" title="type mentat_query_sql::Name">Name</a>),
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Entid(<a class="type" href="../core_traits/type.Entid.html" title="type core_traits::Entid">Entid</a>),
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Integer(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a>),
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Long(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a>),
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Value(<a class="enum" href="../core_traits/enum.TypedValue.html" title="enum core_traits::TypedValue">TypedValue</a>),
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NullableAggregate(<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><<a class="enum" href="../mentat_query_sql/enum.Expression.html" title="enum mentat_query_sql::Expression">Expression</a>>, <a class="enum" href="../core_traits/enum.ValueType.html" title="enum core_traits::ValueType">ValueType</a>),
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Expression(<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><<a class="enum" href="../mentat_query_sql/enum.Expression.html" title="enum mentat_query_sql::Expression">Expression</a>>, <a class="enum" href="../core_traits/enum.ValueType.html" title="enum core_traits::ValueType">ValueType</a>),
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}</pre><div class='docblock'><p>One of the things that can appear in a projection or a constraint. Note that we use
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<code>TypedValue</code> here; it's not pure SQL, but it avoids us having to concern ourselves at this
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point with the translation between a <code>TypedValue</code> and the storage-layer representation.</p>
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<p>Eventually we might allow different translations by providing a different <code>QueryBuilder</code>
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implementation for each storage backend. Passing <code>TypedValue</code>s here allows for that.</p>
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</div><h2 id='variants' class='variants small-section-header'>
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Variants<a href='#variants' class='anchor'></a></h2>
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<span id="variant.Column" class="variant small-section-header"><a href="#variant.Column" class="anchor field"></a><span id='Column.v' class='invisible'><code>Column(<a class="struct" href="../mentat_query_algebrizer/types/struct.QualifiedAlias.html" title="struct mentat_query_algebrizer::types::QualifiedAlias">QualifiedAlias</a>)</code></span></span><span id="variant.ExistingColumn" class="variant small-section-header"><a href="#variant.ExistingColumn" class="anchor field"></a><span id='ExistingColumn.v' class='invisible'><code>ExistingColumn(<a class="type" href="../mentat_query_sql/type.Name.html" title="type mentat_query_sql::Name">Name</a>)</code></span></span><span id="variant.Entid" class="variant small-section-header"><a href="#variant.Entid" class="anchor field"></a><span id='Entid.v' class='invisible'><code>Entid(<a class="type" href="../core_traits/type.Entid.html" title="type core_traits::Entid">Entid</a>)</code></span></span><span id="variant.Integer" class="variant small-section-header"><a href="#variant.Integer" class="anchor field"></a><span id='Integer.v' class='invisible'><code>Integer(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i32.html">i32</a>)</code></span></span><span id="variant.Long" class="variant small-section-header"><a href="#variant.Long" class="anchor field"></a><span id='Long.v' class='invisible'><code>Long(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i64.html">i64</a>)</code></span></span><span id="variant.Value" class="variant small-section-header"><a href="#variant.Value" class="anchor field"></a><span id='Value.v' class='invisible'><code>Value(<a class="enum" href="../core_traits/enum.TypedValue.html" title="enum core_traits::TypedValue">TypedValue</a>)</code></span></span><span id="variant.NullableAggregate" class="variant small-section-header"><a href="#variant.NullableAggregate" class="anchor field"></a><span id='NullableAggregate.v' class='invisible'><code>NullableAggregate(<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><<a class="enum" href="../mentat_query_sql/enum.Expression.html" title="enum mentat_query_sql::Expression">Expression</a>>, <a class="enum" href="../core_traits/enum.ValueType.html" title="enum core_traits::ValueType">ValueType</a>)</code></span></span><span id="variant.Expression" class="variant small-section-header"><a href="#variant.Expression" class="anchor field"></a><span id='Expression.v' class='invisible'><code>Expression(<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html" title="struct alloc::boxed::Box">Box</a><<a class="enum" href="../mentat_query_sql/enum.Expression.html" title="enum mentat_query_sql::Expression">Expression</a>>, <a class="enum" href="../core_traits/enum.ValueType.html" title="enum core_traits::ValueType">ValueType</a>)</code></span></span>
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Trait Implementations<a href='#implementations' class='anchor'></a>
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</h2>
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<h3 id='impl-From%3CQueryValue%3E' class='impl'><span class='in-band'><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><<a class="enum" href="../mentat_query_algebrizer/types/enum.QueryValue.html" title="enum mentat_query_algebrizer::types::QueryValue">QueryValue</a>> for <a class="enum" href="../mentat_query_sql/enum.ColumnOrExpression.html" title="enum mentat_query_sql::ColumnOrExpression">ColumnOrExpression</a></code><a href='#impl-From%3CQueryValue%3E' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_sql/lib.rs.html#85-94' title='goto source code'>[src]</a></span></h3>
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<div class='docblock'><p><code>QueryValue</code> and <code>ColumnOrExpression</code> are almost identical… merge somehow?</p>
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</div><div class='impl-items'><h4 id='method.from' class="method"><span id='from.v' class='invisible'><code>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(v: <a class="enum" href="../mentat_query_algebrizer/types/enum.QueryValue.html" title="enum mentat_query_algebrizer::types::QueryValue">QueryValue</a>) -> Self</code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_sql/lib.rs.html#86-93' title='goto source code'>[src]</a></span></h4>
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<div class='docblock'><p>Performs the conversion.</p>
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</div></div><h3 id='impl-QueryFragment' class='impl'><span class='in-band'><code>impl <a class="trait" href="../mentat_sql/trait.QueryFragment.html" title="trait mentat_sql::QueryFragment">QueryFragment</a> for <a class="enum" href="../mentat_query_sql/enum.ColumnOrExpression.html" title="enum mentat_query_sql::ColumnOrExpression">ColumnOrExpression</a></code><a href='#impl-QueryFragment' class='anchor'></a></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_sql/lib.rs.html#274-305' title='goto source code'>[src]</a></span></h3>
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<div class='impl-items'><h4 id='method.push_sql' class="method"><span id='push_sql.v' class='invisible'><code>fn <a href='../mentat_sql/trait.QueryFragment.html#tymethod.push_sql' class='fnname'>push_sql</a>(&self, out: &mut <a class="trait" href="../mentat_sql/trait.QueryBuilder.html" title="trait mentat_sql::QueryBuilder">QueryBuilder</a>) -> <a class="type" href="../sql_traits/errors/type.BuildQueryResult.html" title="type sql_traits::errors::BuildQueryResult">BuildQueryResult</a></code></span><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/mentat_query_sql/lib.rs.html#275-304' title='goto source code'>[src]</a></span></h4>
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