Enum SetExpr

pub enum SetExpr {
    Select(Box<Select>),
    Query(Box<Query>),
    SetOperation {
        op: SetOperator,
        all: bool,
        corresponding: Corresponding,
        left: Box<SetExpr>,
        right: Box<SetExpr>,
    },
    Values(Values),
}

A node in a tree, representing a “query body” expression, roughly: SELECT ... [ {UNION|EXCEPT|INTERSECT} SELECT ...]

Variants

Select(Box<Select>)

Restricted SELECT .. FROM .. HAVING (no ORDER BY or set operations)

Query(Box<Query>)

Parenthesized SELECT subquery, which may include more set operations in its body and an optional ORDER BY / LIMIT.

SetOperation

UNION/EXCEPT/INTERSECT of two queries

Fields

op: SetOperator

all: bool

corresponding: Corresponding

left: Box<SetExpr>

right: Box<SetExpr>

Values(Values)

Trait Implementations

impl Clone for SetExpr

fn clone(&self) -> SetExpr

Returns a copy 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 Display for SetExpr

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

Formats the value using the given formatter.

impl Hash for SetExpr

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SetExpr

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

impl StructuralPartialEq for SetExpr