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    • 9. 发明授权
    • Method and system for supporting multivalue attributes in a database system
    • 在数据库系统中支持多值属性的方法和系统
    • US07409401B2
    • 2008-08-05
    • US11064737
    • 2005-02-23
    • Lynda A. HansenThomas S. LeeMayank V. Shah
    • Lynda A. HansenThomas S. LeeMayank V. Shah
    • G06F17/00
    • G06F17/30321Y10S707/99942Y10S707/99943Y10S707/99944Y10S707/99945
    • A method and system for supporting multivalue attributes in a database system is disclosed. The method and system includes defining an index class by designating a plurality of attributes associated with the index class, wherein the plurality of attributes includes single value attributes and at least one multivalue attribute, generating an attribute value table for the index class for storing attribute values for the single value attributes, and generating a multiple value table for each of the at least one multivalue attributes for storing attribute values for the at least one multivalue attributes.By generating the multiple value table for the multivalue attribute, each row in the multiple value table corresponds to a single value of the multivalue attribute of the index class. Accordingly, an index scan can be performed to retrieve or update data corresponding to the associated multivalue attribute. Thus, data management becomes more efficient and less costly.
    • 公开了一种在数据库系统中支持多值属性的方法和系统。 所述方法和系统包括通过指定与所述索引类相关联的多个属性来定义索引类,其中所述多个属性包括单值属性和至少一个多值属性,为所述索引类生成用于存储属性值的属性值表 并且为所述至少一个多值属性中的每一个生成用于存储所述至少一个多值属性的属性值的多值表。 通过生成多值属性的多值表,多值表中的每一行对应于索引类的多值属性的单个值。 因此,可以执行索引扫描以检索或更新与相关联的多值属性相对应的数据。 因此,数据管理变得更加高效,成本更低。