本文假设多维数据集模型的维具有平衡的层次结构和标准部署。
This paper assumes the dimensions of the cube model have hierarchies of balanced type and standard deployment.
对于每个多维数据集维,一个多维数据集只能定义一个多维数据集层次结构;但是在多维数据集模型中,一个维可以有多个层次结构。
A cube can have only one cube hierarchy defined for each cube dimension, but a dimension can have many hierarchies that are defined for the cube model.
对于查询中的每个(维、层次结构、级)集,判断使用哪些维属性。
For each (dimension, hierarchy, level) set in the query, determine the attributes from the dimension to be in the query.
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