Enum Expr 

pub enum Expr {
    Column(ColumnRef),
    Value(SqlValue),
    Binary {
        left: Box<Expr>,
        op: BinaryOp,
        right: Box<Expr>,
    },
    Unary {
        op: UnaryOp,
        expr: Box<Expr>,
    },
    Function {
        name: String,
        args: Vec<Expr>,
    },
}

Variants

Column(ColumnRef)

Value(SqlValue)

Binary

Fields

left: Box<Expr>

op: BinaryOp

right: Box<Expr>

Unary

Fields

op: UnaryOp

expr: Box<Expr>

Function

Fields

name: String

args: Vec<Expr>

Implementations

impl Expr

pub fn column<E: Entity>(column: EntityColumn<E>) -> Self

pub fn column_as<E: Entity>( column: EntityColumn<E>, alias: &'static str, ) -> Self

pub const fn value(value: SqlValue) -> Self

pub fn binary(left: Expr, op: BinaryOp, right: Expr) -> Self

pub fn unary(op: UnaryOp, expr: Expr) -> Self

pub fn function(name: impl Into<String>, args: Vec<Expr>) -> Self

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.

impl<E: Entity> From<EntityColumn<E>> for Expr

fn from(value: EntityColumn<E>) -> Self

Converts to this type from the input type.

impl From<Expr> for SelectProjection

fn from(value: Expr) -> Self

Converts to this type from the input type.

impl From<SqlValue> for Expr

fn from(value: SqlValue) -> Self

Converts to this type from the input type.

impl PartialEq for Expr

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Expr