Struct QueryOptimizer 

pub struct QueryOptimizer { /* private fields */ }

Query optimizer for TensorLogic

Implementations

impl QueryOptimizer

pub fn new() -> Self

Create a new query optimizer

pub fn plan_query(&self, goals: &[Predicate], kb: &KnowledgeBase) -> QueryPlan

Create a query plan for a conjunction of goals

pub fn get_stats(&self, predicate_name: &str) -> Option<&PredicateStats>

Get predicate statistics

pub fn all_stats(&self) -> &HashMap<String, PredicateStats>

Get all statistics

pub fn estimate_cardinality( &self, predicate: &Predicate, kb: &KnowledgeBase, ) -> f64

Estimate cardinality for a predicate

pub fn optimize_rule(&self, rule: &Rule, kb: &KnowledgeBase) -> Rule

Optimize a rule by reordering its body predicates

Reorders predicates to put more selective ones first, reducing the intermediate result set size

pub fn update_statistics(&mut self, kb: &KnowledgeBase)

Update selectivity statistics from a knowledge base

pub fn total_facts(&self) -> usize

Get total fact count

pub fn optimize_goal( &self, goals: Vec<Predicate>, kb: &KnowledgeBase, ) -> Vec<Predicate>

Optimize a query goal

For complex goals with multiple predicates, reorder them optimally

pub fn get_recommendations( &self, kb: &KnowledgeBase, ) -> Vec<OptimizationRecommendation>

Get optimization recommendations for a knowledge base

Trait Implementations

impl Default for QueryOptimizer

fn default() -> Self

Returns the “default value” for a type.