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DOI:
Journal of Software:1995.6(8):500-508

IMDBS系统中的多源数据模型、语言及查询处理
王国仁,于戈,张斌,单吉第,郑怀远
(东北大学计算机系,沈阳,110006)
POLYGEN DATA MODEL,LANGUAGE AND QUERY PROCESSING IN IMDBS SYSTEM
Wang Guoren,Yu Ge,Zhang Bin,Shan Jidi,Zheng Huaiyuan
()
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Received:January 10, 1994    Revised:June 02, 1994
> 中文摘要: IMDBS是一个集成式的多数据库系统,该系统是通过对已有的局部异构数据库进行信息和数据的集成,为全局用户提供共享的集成信息;同时每个局部应用仍能在被集成后的数据上运行,这样就保证了局部数据库的自治性.IMDBS系统主要是基于源标签集成机制,并与非一范式(NF2)模型相结合作为多源数据模型,多源数据语言为PSQL/NF,它是一个类SQL语言,非常方便于用户的使用.该系统具有自下而上集成关系、网状和层次数据库以及自上而下地进行分布数据管理的功能,较好地解决了异构分布库系统的全局分布透明性
Abstract:IMDBS is an integrated multi-databases system which can integrate information and data in existing local heterogeneous database systems and supply global users with shared Integrated Information.And all local database applications can still execute on the Integrated database,thus localautonomymlght be preserved.IMDBSbasedonthe source tag Integration mechanism adopted the non first normal form(NF2)data model as its polygendata mode.PSQL/NF,a SQL like polygendata language,Is defined for users to use it to manipulate database conveniently. The system can Integrate traditionaldatabases such as relational,hlerarchlcal and network databases bottomup and managedistributed data top-down,so it fundamentally resolves the conflict between global dl.tribution transparency and local autonomy in heterogeneous distributed database systems.This paper mainly describesthe polygen data model,the polygen data language and theimplementatlontechnlques ofqueryprocessingofthe IMDBSsystem.
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基金项目:本研究得到863高技术的资助. 本研究得到863高技术的资助.
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王国仁,于戈,张斌,单吉第,郑怀远.IMDBS系统中的多源数据模型、语言及查询处理.软件学报,1995,6(8):500-508

Wang Guoren,Yu Ge,Zhang Bin,Shan Jidi,Zheng Huaiyuan.POLYGEN DATA MODEL,LANGUAGE AND QUERY PROCESSING IN IMDBS SYSTEM.Journal of Software,1995,6(8):500-508