Enum SetExpr 

pub enum SetExpr {
    Query(QueryBody),
    SetOp {
        op: SetOp,
        all: bool,
        left: Box<SetExpr>,
        right: Box<SetExpr>,
    },
}

SP38: a node in the set-operation tree. A Query leaf is one query block; a SetOp combines two sub-trees. INTERSECT binds tighter than UNION/EXCEPT; UNION/EXCEPT are left-associative (the parser encodes this in the tree shape).

Variants

Query(QueryBody)

SetOp

Fields

op: SetOp

all: bool

true for … ALL … (keep duplicates); false for the default (duplicate-eliminating) form.

left: Box<SetExpr>

right: Box<SetExpr>

Trait Implementations

impl Clone for SetExpr

fn clone(&self) -> SetExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SetExpr

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

Formats the value using the given formatter.

impl PartialEq for SetExpr

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SetExpr