Struct StatsSnapshot 

pub struct StatsSnapshot {
    pub relations: Vec<RelationStats>,
    pub join_selectivities: Vec<JoinSelectivity>,
    pub rel_names: Vec<(RelId, String)>,
}

Serializable snapshot of collected statistics.

This is intended for feeding runtime observations back into the compiler/optimizer.

Fields

relations: Vec<RelationStats>

Per-relation statistics.

join_selectivities: Vec<JoinSelectivity>

Cached join selectivity models.

rel_names: Vec<(RelId, String)>

Optional mapping from runtime RelId to predicate name.

When present, consumers should prefer this over raw RelId matching to avoid misapplying statistics across different programs where RelIds may be reused.

Trait Implementations

impl Clone for StatsSnapshot

fn clone(&self) -> StatsSnapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StatsSnapshot

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

Formats the value using the given formatter.

impl Default for StatsSnapshot

fn default() -> StatsSnapshot

Returns the “default value” for a type.