Enum JoinOrderStrategy 

pub enum JoinOrderStrategy {
    Auto,
    Fixed,
    LeftToRight,
    SmallestFirst,
    MostSelectiveFirst,
}

Join ordering strategies

Variants

Auto

Use optimizer’s choice

Fixed

Fixed order as specified

LeftToRight

Process in left-to-right order as written

SmallestFirst

Start with smallest estimates

MostSelectiveFirst

Start with most selective

Trait Implementations

impl Clone for JoinOrderStrategy

fn clone(&self) -> JoinOrderStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JoinOrderStrategy

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for JoinOrderStrategy

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for JoinOrderStrategy

fn eq(&self, other: &JoinOrderStrategy) -> 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 Serialize for JoinOrderStrategy

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for JoinOrderStrategy

impl Eq for JoinOrderStrategy

impl StructuralPartialEq for JoinOrderStrategy