面向对象数据库的查询转换成关系数据库的查询

Translating Object-Oriented Database Query to Relational Database Query

文章基于从面向对象数据库(OODB)到关系数据库(RDB)的模式转换,提出了一种从面向对象数据库查询到关系数据库查询的转换算法。该算法主要针对关系数据库中不支持的,而面向对象数据库查询中特有的面向对象特征,诸如,类分层结构、类复合分层结构和集合属性,以及考虑由传统的关系运算来实现它们的语义的一般方法。这项研究的结果可以用于将关系数据库管理系统(RDBMS)升级为面向对象数据库管理系统(OODBMS),也可以用于面向对象数据库和关系数据库之间的互操作。

In this paper,based on a schema translation from Object-Oriented Database(OODB)to Relational Database (RDB), it proposes an algorithm for translating OODB query to RDB query .The algorithm aims at marked object-oriented characteristics in OODB query which RDB query doesn't support,such as class hierarchy,class composition hierarchy and set attribute,and considers a general method to realize their semantics by traditional relational operations.The result of this research can be used to upgrade a Relational Database Management System (RDBMS)to an Object-Oriented Database Management System(OODBMS)and applied to the interoperability between OODB and RDB.