Struct AdvancedQueryOptimizer 

pub struct AdvancedQueryOptimizer { /* private fields */ }

Advanced query optimizer

Implementations

impl AdvancedQueryOptimizer

pub fn new( row_count: u64, column_count: usize, total_size_estimate: f64, column_stats: HashMap<String, ColumnStatistics>, ) -> Self

Create new optimizer

pub fn optimize_query( &self, num_columns: usize, has_predicates: bool, ) -> Option<CandidatePlan>

Optimize query and return best plan

pub fn get_top_plans( &self, num_columns: usize, has_predicates: bool, n: usize, ) -> Vec<CandidatePlan>

Get top N plans

pub fn register_index(&mut self, column: String, index_type: IndexType)

Register index for optimization

pub fn index_coordinator(&self) -> &MultiIndexCoordinator

Get index coordinator

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

Get selectivity for column

Trait Implementations

impl Clone for AdvancedQueryOptimizer

fn clone(&self) -> AdvancedQueryOptimizer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AdvancedQueryOptimizer

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

Formats the value using the given formatter.