Enum ConstraintBacking 

pub enum ConstraintBacking {
    Range,
    Hash,
}

What a uniqueness or key constraint’s backing index keeps.

Variants

Range

The hash index the uniqueness check reads and a sorted copy of each value, which also answers range, prefix and ordered seeks (the default, as a RANGE index).

Hash

The hash index alone (OPTIONS { indexProvider: 'hash' }): about 80 bytes less per entity for a string key, and no range, prefix or ordered seeks on it (G-64).

Trait Implementations

impl Clone for ConstraintBacking

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ConstraintBacking

impl Debug for ConstraintBacking

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

Formats the value using the given formatter.

impl Default for ConstraintBacking

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ConstraintBacking

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ConstraintBacking

impl PartialEq for ConstraintBacking

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ConstraintBacking

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ConstraintBacking