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< title > mentat_query_sql::ColumnOrExpression - Rust< / title >
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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 > < a class = "sidebar-title" href = "#synthetic-implementations" > Auto Trait Implementations< / a > < div class = "sidebar-links" > < a href = "#impl-Send" > !Send< / a > < a href = "#impl-Sync" > !Sync< / 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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< section id = 'main' class = "content" > < 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 > < a class = 'srclink' href = '../src/mentat_query_sql/lib.rs.html#59-70' title = 'goto source code' > [src]< / a > < / span > < / h1 > < div class = "docblock type-decl" > < pre class = 'rust enum' > pub enum ColumnOrExpression {
Column(< a class = "struct" href = "../mentat_query_algebrizer/types/struct.QualifiedAlias.html" title = "struct mentat_query_algebrizer::types::QualifiedAlias" > QualifiedAlias< / a > ),
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 = "../mentat_core/types/type.Entid.html" title = "type mentat_core::types::Entid" > Entid< / a > ),
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Integer(< a class = "primitive" href = "https://doc.rust-lang.org/nightly/std/primitive.i32.html" > i32< / a > ),
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 = "../mentat_core/types/enum.TypedValue.html" title = "enum mentat_core::types::TypedValue" > TypedValue< / a > ),
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 = "../mentat_core/types/enum.ValueType.html" title = "enum mentat_core::types::ValueType" > ValueType< / a > ),
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 = "../mentat_core/types/enum.ValueType.html" title = "enum mentat_core::types::ValueType" > ValueType< / a > ),
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}< / pre > < / div > < div class = 'docblock' > < p > One of the things that can appear in a projection or a constraint. Note that we use
< code > TypedValue< / code > here; it's not pure SQL, but it avoids us having to concern ourselves at this
point with the translation between a < code > TypedValue< / code > and the storage-layer representation.< / p >
< p > Eventually we might allow different translations by providing a different < code > QueryBuilder< / code >
implementation for each storage backend. Passing < code > TypedValue< / code > s here allows for that.< / p >
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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 = "../mentat_core/types/type.Entid.html" title = "type mentat_core::types::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 = "../mentat_core/types/enum.TypedValue.html" title = "enum mentat_core::types::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 = "../mentat_core/types/enum.ValueType.html" title = "enum mentat_core::types::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 = "../mentat_core/types/enum.ValueType.html" title = "enum mentat_core::types::ValueType" > ValueType< / a > )< / code > < / span > < / span >
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< h3 id = 'impl-From%3CQueryValue%3E' class = 'impl' > < span class = 'in-band' > < table class = 'table-display' > < tbody > < tr > < td > < 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 > < / td > < td > < span class = 'out-of-band' > < div class = 'ghost' > < / div > < a class = 'srclink' href = '../src/mentat_query_sql/lib.rs.html#77-86' title = 'goto source code' > [src]< / a > < / span > < / td > < / tr > < / tbody > < / table > < / h3 > < div class = 'docblock' > < p > < code > QueryValue< / code > and < code > ColumnOrExpression< / code > are almost identical… merge somehow?< / p >
< / div > < div class = 'impl-items' > < h4 id = 'method.from' class = "method" > < span id = 'from.v' class = 'invisible' > < table class = 'table-display' > < tbody > < tr > < td > < 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 > < / td > < td > < span class = 'out-of-band' > < div class = 'ghost' > < / div > < a class = 'srclink' href = '../src/mentat_query_sql/lib.rs.html#78-85' title = 'goto source code' > [src]< / a > < / td > < / tr > < / tbody > < / table > < / span > < / h4 > < div class = 'docblock' > < p > Performs the conversion.< / p >
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< / div > < / div > < h3 id = 'impl-QueryFragment' class = 'impl' > < span class = 'in-band' > < table class = 'table-display' > < tbody > < tr > < td > < 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 > < / td > < td > < span class = 'out-of-band' > < div class = 'ghost' > < / div > < a class = 'srclink' href = '../src/mentat_query_sql/lib.rs.html#266-297' title = 'goto source code' > [src]< / a > < / span > < / td > < / tr > < / tbody > < / table > < / h3 > < div class = 'impl-items' > < h4 id = 'method.push_sql' class = "method" > < span id = 'push_sql.v' class = 'invisible' > < table class = 'table-display' > < tbody > < tr > < td > < 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 = "../mentat_sql/type.BuildQueryResult.html" title = "type mentat_sql::BuildQueryResult" > BuildQueryResult< / a > < / code > < / span > < / td > < td > < span class = 'out-of-band' > < div class = 'ghost' > < / div > < a class = 'srclink' href = '../src/mentat_query_sql/lib.rs.html#267-296' title = 'goto source code' > [src]< / a > < / td > < / tr > < / tbody > < / table > < / span > < / h4 > < / div > < / div >
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