摘要： 本文讨论了关系数据库中的抽象数据类型属性值对传统DBMS索引机制的影响,并提出了一种基于用户定义新操作的扩充传统索引机制的原理、方法和处理策略。扩充的索引机制可以有效地支持对ADT属性的快速存取。

关键词: B~+树, 抽象数据类型, 关系DBMS, 扩充关系模型, 可扩充DBMS

Abstract: This paper discusses that attribute values in RDB have an effect on traditional DBMS'S index mechanism and explores the principle, method and manipulating strategy of extended traditional index mechanism, which is based on new user defined operators. Fast access to ADT attributes can be effectively supported by extending index mechanism.