Struct QueryOptimizer 

pub struct QueryOptimizer { /* private fields */ }

Query optimizer for backward chaining

Implementations

impl QueryOptimizer

pub fn new() -> Self

Create a new query optimizer

pub fn with_config(config: OptimizerConfig) -> Self

Create optimizer with custom configuration

pub fn optimize_goals(&mut self, goals: Vec<Goal>) -> Vec<Goal>

Optimize a list of goals

Returns a reordered list of goals optimized for evaluation

pub fn estimate_selectivity(&self, goal: &Goal) -> f64

Estimate selectivity of a goal (lower = more selective)

Returns a value between 0.0 (very selective) and 1.0 (not selective)

pub fn set_selectivity(&mut self, predicate: String, selectivity: f64)

Set selectivity estimate for a predicate

pub fn stats(&self) -> &OptimizationStats

Get optimization statistics

pub fn reset_stats(&mut self)

Reset statistics

pub fn set_reordering(&mut self, enabled: bool)

Enable or disable goal reordering

pub fn set_index_selection(&mut self, enabled: bool)

Enable or disable index selection

pub fn set_memoization(&mut self, enabled: bool)

Enable or disable memoization

Trait Implementations

impl Clone for QueryOptimizer

fn clone(&self) -> QueryOptimizer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryOptimizer

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

Formats the value using the given formatter.

impl Default for QueryOptimizer

fn default() -> Self

Returns the “default value” for a type.