Struct Keyed 

pub struct Keyed<K, Req, S: SqlType> { /* private fields */ }

An expression that carries its own row key K: count() and the window functions, whose identity is the function that produced them. Selecting two of the same one into a row is what row::Row::get rejects, and what LabelExt::label exists to resolve.

Trait Implementations

impl<K, Req, S: SqlType> Clone for Keyed<K, Req, S>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<K, Req, S: SqlType> IntoExpr for Keyed<K, Req, S>

type Sql = S

The SQL type this expression has. An associated type rather than a parameter because every implementor has exactly one — a column its declared type, a literal its leaf type — which is what lets a mismatch report itself as Comparable/AssignsTo rather than as an inference failure on a type nobody wrote.

type Req = Req

fn into_expr(self) -> Expr<Req, S>

impl<K, Req, S: SqlType> LabelExt for Keyed<K, Req, S>

fn label<K: LabelKey>(self, _key: K) -> Labeled<K, Self>

impl<K: Spelled, Req, S: SqlType> LookupKey for Keyed<K, Req, S>

impl<K, Req, S: BoolLike> Not for Keyed<K, Req, S>

type Output = Keyed<K, Req, S>

The resulting type after applying the ! operator.

fn not(self) -> Self::Output

Performs the unary ! operation.

impl<K, Req, S: SqlType, Scope, Idx> RowField<Scope, Idx> for Keyed<K, Req, S>

where Scope: Superset<Req, Idx>,

type Value = <S as SqlType>::Native

fn item(&self) -> SelectItem

impl<K, Req, S: SqlType> RowKey for Keyed<K, Req, S>

type Key = K

impl<K, Req, S: SqlType, Scope, Idx> Selection<Scope, Idx> for Keyed<K, Req, S>

where Keyed<K, Req, S>: RowField<Scope, Idx>,

type Output = <Keyed<K, Req, S> as RowField<Scope, Idx>>::Value

fn items(&self) -> Vec<SelectItem>

impl<K, Req, S: SqlType, Scope, Idx> SelectionPart<Scope, Idx> for Keyed<K, Req, S>

where Keyed<K, Req, S>: RowField<Scope, Idx>,

type Fields<Tail> = RowCons<<Keyed<K, Req, S> as RowKey>::Key, <Keyed<K, Req, S> as RowField<Scope, Idx>>::Value, Tail>

fn push_items(&self, out: &mut Vec<SelectItem>)