Enum SetTree 

pub enum SetTree {
    Leaf(usize),
    Op(Box<SetOp>),
}

A part of the tree of a set operation.

Variants

Leaf(usize)

A SELECT, as the index of its subquery in Query::relations.

Op(Box<SetOp>)

An operation on two parts.

Implementations

impl SetTree

pub fn leftmost(&self) -> usize

The index of the leftmost SELECT.

pub fn each_leaf(&self, f: &mut impl FnMut(usize))

Calls f for the index of each SELECT of the part.

Trait Implementations

impl Clone for SetTree

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SetTree

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

Formats the value using the given formatter.

impl PartialEq for SetTree

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SetTree