Method eq_selectivity

nodedb/src/engine/sparse/stats.rs:135–141

Selectivity estimate for equality predicate (1 / distinct_count).

(&self)

    /// Selectivity estimate for equality predicate (1 / distinct_count).
    pub fn eq_selectivity(&self) -> f64 {
        if self.distinct_count == 0 {
            1.0
        } else {
            1.0 / self.distinct_count as f64
        }
    }

    /// Selectivity estimate for range predicate (heuristic: 0.33).
    pub fn range_selectivity(&self) -> f64 {