Struct Optimizer 

pub struct Optimizer { /* private fields */ }

Rule-based optimizer for Krishiv logical plans.

Rules are applied in the order they were added. Each rule receives the plan produced by the previous rule. If a rule does not change the plan it should return the input unchanged; the optimizer detects changes via PartialEq and only records a rule in OptimizeResult::applied_rules when it actually modifies the plan.

Implementations

impl Optimizer

pub fn new() -> Self

Create an optimizer with no rules.

pub fn add_rule(&mut self, rule: Box<dyn OptimizerRule>)

Append a rule to the optimizer pipeline.

pub fn optimize(&self, plan: LogicalPlan) -> OptimizerResult<OptimizeResult>

Run all rules in order and return the final plan together with the list of rules that produced a visible change.

P2.4: rules signal no-change by returning None, avoiding an O(rules × plan_size) clone-per-rule cycle.

Trait Implementations

impl Default for Optimizer

fn default() -> Self

Returns the “default value” for a type.