| 可扩充DBMS的用户扩充存取方法的研究 |
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| 引用本文： | 秦小麟,林钧海.可扩充DBMS的用户扩充存取方法的研究[J].航空学报,1995,16(6):711-714. |
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| 作者姓名： | 秦小麟 林钧海 |
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| 作者单位： | 南京航空航天大学计算机系!南京，210016，南京航空航天大学计算机系!南京，210016 |
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| 摘 要： | 介绍可扩充 DBMS- NHEDB的用户扩充新索引方法的原理、方法及实现策略。提出一种以数据字典为联接媒介 ,借助于存取数据库的函数库的实现方案 ,并详细讨论了对 DBMS的各种主要影响及处理方法
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| 关 键 词： | 数据库管理系统 索引机制 接口 |
THE RESEARCH ON THE NEW ACCESS METHOD EXTENDED BY USER IN EXTENSIBLE DBMS |
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| Qin Xiaolin,Lin Junhai.THE RESEARCH ON THE NEW ACCESS METHOD EXTENDED BY USER IN EXTENSIBLE DBMS[J].Acta Aeronautica et Astronautica Sinica,1995,16(6):711-714. |
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| Authors: | Qin Xiaolin Lin Junhai |
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| Institution: | Department of Computer, Nanjing University of Aeronautics and Astronautics,Nanjing,210016 |
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| Abstract: | Because a user can define new data types in extensible DBMS,DBMS's built in index mechanism can not support quick access for special requirement. Therefore,the new access method extended by the user is one of the basic functions of extensible DBMS. The principle, method, and implementation strategies of the new index structure extended by the user in extensible database management system, NHEDB are introduced. An implementation scheme based on data dictionary and function library is proposed. The data dictionary is used for the interface between DBMS and extended module. The function library,which includes 14 functions,is the interface between the user and extended module. Various effects on DBMS,the design of extensible interface,and implementation algorithms are also discussed. |
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| Keywords: | data base management systems indexes mechanism sections |
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