Struct AdvancedStatisticsCollector 

pub struct AdvancedStatisticsCollector { /* private fields */ }

Advanced statistics collector with histogram support

Implementations

impl AdvancedStatisticsCollector

pub fn new() -> Self

Create a new advanced statistics collector

pub fn record_pattern_execution( &self, pattern: &AlgebraTriplePattern, actual_cardinality: usize, execution_time_ms: u64, )

Record execution of a triple pattern

pub fn estimate_cardinality( &self, pattern: &AlgebraTriplePattern, ) -> Option<usize>

Estimate cardinality for a pattern using histograms

pub fn record_join_execution( &self, _left_pattern: &GraphPattern, _right_pattern: &GraphPattern, left_cardinality: usize, right_cardinality: usize, result_cardinality: usize, )

Record join execution for selectivity learning

pub fn estimate_join_selectivity( &self, left_card: usize, right_card: usize, ) -> f64

Estimate join selectivity

pub fn get_pattern_history( &self, pattern: &AlgebraTriplePattern, ) -> Vec<PatternExecution>

Get execution history for a pattern

pub fn get_statistics(&self) -> AdvancedStatistics

Get overall statistics

pub fn clear(&self)

Clear all statistics (useful for testing)

Trait Implementations

impl Debug for AdvancedStatisticsCollector

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

Formats the value using the given formatter.

impl Default for AdvancedStatisticsCollector

fn default() -> Self

Returns the “default value” for a type.