Struct SelectExpr 

pub struct SelectExpr {
    pub expr: Expr,
    pub alias: Option<Ident>,
}

A projected expression.

Fields

expr: Expr

Expression.

alias: Option<Ident>

Output name.

Implementations

impl SelectExpr

pub fn new(expr: Expr, alias: Option<Ident>) -> Self

Projection of expr under an optional output name.

Trait Implementations

impl Clone for SelectExpr

fn clone(&self) -> SelectExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SelectExpr

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<&'static str> for SelectExpr

A column of the root model, named after itself.

fn from(column: &'static str) -> Self

Converts to this type from the input type.

impl<N: Into<Ident>, E: Into<Expr>> From<(N, E)> for SelectExpr

An expression under an explicit output name: ("total", Sum::of(..)).

fn from((name, expr): (N, E)) -> Self

Converts to this type from the input type.

impl<M, T> From<Field<M, T>> for SelectExpr

fn from(f: Field<M, T>) -> Self

Converts to this type from the input type.

impl<M, T> From<Joined<M, T>> for SelectExpr

fn from(j: Joined<M, T>) -> Self

Converts to this type from the input type.

impl PartialEq for SelectExpr

fn eq(&self, other: &SelectExpr) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for SelectExpr