Struct CostBasedOptimizer 

pub struct CostBasedOptimizer<'a> { /* private fields */ }

Cost-based optimizer that explores rewrite space.

Implementations

impl<'a> CostBasedOptimizer<'a>

pub fn new(context: &'a CompilerContext) -> Self

Create a new cost-based optimizer.

pub fn with_cost_weights(self, weights: CostWeights) -> Self

Set custom cost weights.

pub fn with_max_alternatives(self, max: usize) -> Self

Set maximum number of alternatives to explore.

pub fn optimize(&mut self, expr: &TLExpr) -> (TLExpr, CostBasedStats)

Optimize an expression by cost.