Enum Expr 

pub enum Expr {
    Column(&'static str),
    Val(SqlVal),
    Placeholder,
    Condition(Box<BoolExpr>),
}

Abstract representation of a database expression.

Variants

Column(&'static str)

A column, referenced by name.

Val(SqlVal)

A value.

Placeholder

A placeholder for a value.

Condition(Box<BoolExpr>)

A boolean condition.

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 PartialEq for Expr

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Expr