Struct QueryStatistics 

pub struct QueryStatistics { /* private fields */ }

Statistics about predicate access patterns

Implementations

impl QueryStatistics

pub fn new() -> Self

pub fn record_query( &mut self, query_type: impl Into<String>, duration: Duration, result_count: usize, total_predicates: usize, )

Record a query execution

pub fn top_queries(&self, limit: usize) -> Vec<(String, usize)>

Get the most frequent query types

pub fn get_selectivity(&self, query_type: &str) -> f64

Get average selectivity for a query type

pub fn get_avg_time(&self, query_type: &str) -> Duration

Get average execution time for a query type

Trait Implementations

impl Clone for QueryStatistics

fn clone(&self) -> QueryStatistics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryStatistics

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

Formats the value using the given formatter.

impl Default for QueryStatistics

fn default() -> Self

Returns the “default value” for a type.