Enum JoinKind 

pub enum JoinKind {
    Inner,
    Left,
    Cross,
    Right,
    FullOuter,
    Semi,
}

Variants

Inner

Left

Cross

Right

v7.37.16 — RIGHT [OUTER] JOIN: keep every right (peer) row, NULL-filling the left (drive) columns on unmatched right rows. The executor runs the LEFT algorithm’s mirror: it tracks which peer rows matched and emits the unmatched ones with a NULL-left tuple after the probe loop. Output column order is unchanged (left-table cols then right-table cols).

FullOuter

v7.37.16 — FULL [OUTER] JOIN: keep every row from both sides (LEFT-unmatched → NULL right, RIGHT-unmatched → NULL left).

Semi

v7.39 (round 725) — SEMI join: each drive row is kept AT MOST once, paired with the first peer row that satisfies the ON. Not reachable from SQL — the EXISTS pull-up emits it, which is what frees positive EXISTS from the round-721 uniqueness gate (an INNER join would multiply the outer rows; a semi join cannot).

Trait Implementations

impl Clone for JoinKind

fn clone(&self) -> JoinKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for JoinKind

impl Debug for JoinKind

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

Formats the value using the given formatter.

impl Eq for JoinKind

impl PartialEq for JoinKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for JoinKind