AN EXTENDED MULTIDIMENSIONAL DATA MODEL OF DATA WAREHOUSE AND A REDUCTION MODEL OF CUBE VIEWS

摘要

Popular multidimensional data models of data warehouse have some limitations. In this paper, we propose an extended multidimensional data model based on dimension combination lattice implemented in our data warehouse engine prototype. We also propose a practical multilevel interest model in our extended model that can efficiently reduce the search space of materialized-view selection algorithms of data cube.