Enum JoinAlgorithm 

pub enum JoinAlgorithm {
    Hash,
    SortMerge,
    NestedLoop,
    IndexNestedLoop,
}

Join algorithm selection.

Variants

Hash

Hash join - best for equi-joins with no index.

SortMerge

Sort-merge join - best when both inputs are sorted.

NestedLoop

Nested loop join - fallback for non-equi joins.

IndexNestedLoop

Index nested loop join - when one side has an index.

Trait Implementations

impl Clone for JoinAlgorithm

fn clone(&self) -> JoinAlgorithm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JoinAlgorithm

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

Formats the value using the given formatter.

impl PartialEq for JoinAlgorithm

fn eq(&self, other: &JoinAlgorithm) -> 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 Copy for JoinAlgorithm

impl Eq for JoinAlgorithm

impl StructuralPartialEq for JoinAlgorithm