Struct PlannerStats 

pub struct PlannerStats {
    pub per_attr: BTreeMap<AttrId, AttrStats>,
    pub total_datoms: usize,
    pub entity_count: usize,
}

Whole-view statistics for the query planner.

Fields

per_attr: BTreeMap<AttrId, AttrStats>

Statistics per attribute.

total_datoms: usize

Total datoms in the view.

entity_count: usize

Distinct entities in the view.

Implementations

impl PlannerStats

pub fn estimate(&self, e_bound: bool, a: Option<AttrId>, v_bound: bool) -> usize

Estimated datoms matched by a scan with the given bound components.

Trait Implementations

impl Clone for PlannerStats

fn clone(&self) -> PlannerStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PlannerStats

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

Formats the value using the given formatter.

impl Default for PlannerStats

fn default() -> PlannerStats

Returns the “default value” for a type.