Method optimize

graphlite/src/plan/optimizers/logical_optimizer.rs:34–58

Optimize a logical plan Originally: optimizer.rs line 1470

(&self, mut plan: LogicalPlan)

    /// Optimize a logical plan
    /// Originally: optimizer.rs line 1470
    pub fn optimize(&self, mut plan: LogicalPlan) -> Result<LogicalPlan, PlanningError> {
        match self.optimization_level {
            OptimizationLevel::None => Ok(plan),

            OptimizationLevel::Basic => {
                // Apply basic optimizations
                plan = self.apply_predicate_pushdown(plan)?;
                plan = self.apply_projection_elimination(plan)?;
                plan = self.apply_subquery_unnesting(plan)?;
                Ok(plan)
            }

            OptimizationLevel::Advanced | OptimizationLevel::Aggressive => {
                // Apply all basic optimizations
                plan = self.apply_predicate_pushdown(plan)?;
                plan = self.apply_projection_elimination(plan)?;

                // Apply advanced optimizations
                plan = self.apply_subquery_unnesting(plan)?;
                plan = self.apply_join_reordering(plan)?;

                Ok(plan)
            }
        }
    }

    // ========================================================================
    // Optimization Rules (to be fully extracted from optimizer.rs)