Enum CompoundOp 

pub enum CompoundOp {
    Union,
    UnionAll,
    Intersect,
    Except,
}

A compound-operator — the four SQLite has, and no more.

From https://www.sqlite.org/syntax/compound-operator.html:

UNION | UNION ALL | INTERSECT | EXCEPT

ALL belongs to the operator here rather than being a separate flag, because SQLite offers it on UNION alone: INTERSECT ALL and EXCEPT ALL are rejected by SQLite’s own parser as well as by the engine. Folding it into the enum is how “there is no INTERSECT ALL” is said in a way that cannot be written by accident — the shape PostgreSQL needs, a SetOp plus an all flag, would make it representable.

Variants

Union

UNION — rows of either, duplicates removed.

UnionAll

UNION ALL — rows of either, duplicates kept.

Intersect

INTERSECT — rows of both.

Except

EXCEPT — rows of the left that are not in the right.

Implementations

impl CompoundOp

pub fn as_str(self) -> &'static str

The operator, as written.

Trait Implementations

impl Clone for CompoundOp

fn clone(&self) -> CompoundOp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CompoundOp

impl Debug for CompoundOp

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

Formats the value using the given formatter.

impl Eq for CompoundOp

impl PartialEq for CompoundOp

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CompoundOp