基于有向图描述数据仓库中复杂维层次结构的方法研究  

Researching the Hierarchy of Dimensions in Data WareHouse Using Directed Graph

作　　者：翟巍[1] 迟忠先[1] 方芳[1] 

机构地区：[1]大连理工大学计算机系,辽宁大连116024

出　　处：《小型微型计算机系统》2003年第9期1641-1645,共5页Journal of Chinese Computer Systems

摘　　要：针对数据仓库中复杂维结构的特点 ,提出建立基于有向图的维字典图以辅助联机分析中有关维层次的定义 ,并利用维字典图重新定义了数据仓库多维数据模型和关于维层次的重要 OL AP操作 .该方法能够在复杂维层次结构的情况下灵活地适应用户的分析需求 。In this paper, we introduce the methods to describing the hierarchical structure of dimention in data warehouse using directed graph. We define the Dimentional Dictionary Graph based on some necessary definitions. We extend the definition of multi-dimentional data model using dimentional dictionary graph, and also give two kinds of definitions of some OLAP operations related to hierarchy. Compared with other methods, our definitions make fully use of the complexity of dimention hierarchical structure, thus improve the processing ability of OLAP.

关 键 词：数据仓库 联机分析(OLAP) 多维数据模型 层次 有向图 

分 类 号：TP315[自动化与计算机技术—计算机软件与理论]