Outline ● Motivation ● Problem formulation e Progressive framework Pivotal Entry-based Method ● Range- based method ° Experiment ● Conclusion 2/2/2021 Topk Search(@ ICD E2013Outline Motivation Problem Formulation Progressive Framework Pivotal Entry-based Method Range-based Method Experiment Conclusion 2/2/2021 TopkSearch @ ICDE2013 14/42