Struct PredStat 

pub struct PredStat {
    pub predicate: u32,
    pub count: u64,
    pub distinct_subjects: u64,
    pub distinct_objects: u64,
    pub max_objects_per_subject: u32,
    pub max_subjects_per_object: u32,
}

Per-predicate cardinality statistics for the cost-based query planner — computed at build, range-fetched with the pyramid (index-free). count is the triple total; the distinct-subject/object counts and max multiplicities let the planner estimate a bound subject’s/object’s selectivity (functional iff max_objects_per_subject == 1, inverse-functional iff max_subjects_per_object == 1).

Fields

predicate: u32

count: u64

distinct_subjects: u64

distinct_objects: u64

max_objects_per_subject: u32

max_subjects_per_object: u32

Trait Implementations

impl Clone for PredStat

fn clone(&self) -> PredStat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PredStat

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

Formats the value using the given formatter.

impl Eq for PredStat

impl PartialEq for PredStat

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for PredStat