Enum QueryPattern 

pub enum QueryPattern {
    FullScan,
    SubjectOnly,
    PredicateOnly,
    ObjectOnly,
    GraphOnly,
    SubjectPredicate,
    SubjectObject,
    PredicateObject,
    SubjectPredicateObject,
    FullMatch,
}

Query pattern types for index optimization

Variants

FullScan

SubjectOnly

PredicateOnly

ObjectOnly

GraphOnly

SubjectPredicate

SubjectObject

PredicateObject

SubjectPredicateObject

FullMatch

Implementations

impl QueryPattern

pub fn from_query( subject: Option<&Subject>, predicate: Option<&Predicate>, object: Option<&Object>, graph_name: Option<&GraphName>, ) -> Self

Determine the query pattern from optional parameters

pub fn estimated_selectivity(&self) -> f64

Estimate the selectivity of this query pattern (lower is more selective)

Trait Implementations

impl Clone for QueryPattern

fn clone(&self) -> QueryPattern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryPattern

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

Formats the value using the given formatter.

impl Hash for QueryPattern

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for QueryPattern

fn eq(&self, other: &QueryPattern) -> 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 QueryPattern

impl StructuralPartialEq for QueryPattern