Enum IndexStrategy 

pub enum IndexStrategy {
    FullScan,
    NameHash,
    ArityRange,
    SignatureHash,
    DomainInverted,
    Composite(Vec<IndexStrategy>),
}

Index strategy for predicate lookups

Variants

FullScan

No index, full scan

NameHash

Hash index on predicate name

ArityRange

Range index on arity

SignatureHash

Hash index on signature

DomainInverted

Inverted index on domains

Composite(Vec<IndexStrategy>)

Composite index

Implementations

impl IndexStrategy

pub fn estimate_cost( &self, predicates_count: usize, _stats: &QueryStatistics, ) -> f64

Estimate the cost of using this strategy

Trait Implementations

impl Clone for IndexStrategy

fn clone(&self) -> IndexStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IndexStrategy

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

Formats the value using the given formatter.

impl PartialEq for IndexStrategy

fn eq(&self, other: &IndexStrategy) -> 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 Eq for IndexStrategy

impl StructuralPartialEq for IndexStrategy