PartitionPlan pplan = new MostPopularPartitioner(this.designer, this.info).generate(hints);
// Cost Estimate
AbstractCostModel cost_model = info.getCostModel();
assert (cost_model != null);
cost_model.applyDesignerHints(hints);
cost_model.clear();
double cost = cost_model.estimateWorkloadCost(this.info.catalogContext, this.info.workload);
// Memory Estimate
long memory = this.info.getMemoryEstimator().estimate(this.info.catalogContext.database, info.getNumPartitions());