As the latest version of relational database standard, SQL3 not only has been extended with many new relational features but also added with the object-oriented technologies. This paper introduces the object-oriented ...As the latest version of relational database standard, SQL3 not only has been extended with many new relational features but also added with the object-oriented technologies. This paper introduces the object-oriented features of SQL3 and then extends it with object deputy model to support object view mechanisms. Key words SQL3 - object-relational database - object deputy model - inheritance CLC number TP 392 Foundation item: Supported by the National Natural Science Foundation of China (60273072), 863 Foundation of China (2002AA4Z3450), Research Fund for the Doctoral Program of Higher Education(20010486029) and Hubei Natural Science Fund for Distinguished Youth(2002AC003)Biography: ZHUANG Ji-feng (1979-), male, Master, research direction: database theory.展开更多
It can not provide dynamic view mechanism in previous dataspace information system. In this paper, the dynamic extendable view mechanism provided by object deputy model is proposed for personalized dataspace informati...It can not provide dynamic view mechanism in previous dataspace information system. In this paper, the dynamic extendable view mechanism provided by object deputy model is proposed for personalized dataspace information system which can provide rich semantics and enough flexibility. The flexible inheritance avoids a lot of data redundancy. The cross class query mechanism allows users to find more related data based on complex relationships. The personalized dataspace service provides less storage space consumption and shorter query response time. The experiment result shows that our approach is more feasible and efficient than the traditional one.展开更多
文摘As the latest version of relational database standard, SQL3 not only has been extended with many new relational features but also added with the object-oriented technologies. This paper introduces the object-oriented features of SQL3 and then extends it with object deputy model to support object view mechanisms. Key words SQL3 - object-relational database - object deputy model - inheritance CLC number TP 392 Foundation item: Supported by the National Natural Science Foundation of China (60273072), 863 Foundation of China (2002AA4Z3450), Research Fund for the Doctoral Program of Higher Education(20010486029) and Hubei Natural Science Fund for Distinguished Youth(2002AC003)Biography: ZHUANG Ji-feng (1979-), male, Master, research direction: database theory.
基金Supported by the National Natural Science Foundation of China (60573095)the Program for New Century Excellent Talents at Univer-sity of China (NCET-04-0675)+2 种基金the National High Technology Research and Development Program of China (2006AA12Z210)Specialized Research Fund for the Doctoral Program of Higher Education of China (20050486024)State Key Laboratory of Software Engineering (SKLSE05-01)
文摘It can not provide dynamic view mechanism in previous dataspace information system. In this paper, the dynamic extendable view mechanism provided by object deputy model is proposed for personalized dataspace information system which can provide rich semantics and enough flexibility. The flexible inheritance avoids a lot of data redundancy. The cross class query mechanism allows users to find more related data based on complex relationships. The personalized dataspace service provides less storage space consumption and shorter query response time. The experiment result shows that our approach is more feasible and efficient than the traditional one.
