Struct Var 

pub struct Var {
    pub relation: usize,
    pub attnum: i16,
    pub levels_up: usize,
}

A column of a relation of FROM.

Fields

relation: usize

The index of the relation in crate::Query::relations.

attnum: i16

The attribute number: from 1 for a column of the relation, or a negative number for a system column.

levels_up: usize

varlevelsup: 0 for a relation of the query that has the expression, 1 for a relation of the query outside it, and so on.

Trait Implementations

impl Clone for Var

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Var

impl Debug for Var

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

Formats the value using the given formatter.

impl Eq for Var

impl PartialEq for Var

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Var