组件技术和信息系统多数据源集成的研究和实现

【作者】 张健；

【导师】 蔡自兴；

【作者基本信息】 中南大学 ， 计算机应用技术， 2002， 硕士

【摘要】 由于历史等原因，Internet／Intranet上的数据库系统不少是分布、异构的。某些情况下，这些数据库中的相关信息需要统一的进行管理，这就迫切需要开发出相应的应用系统来集成多数据库中的相关数据并使用户能够充分的理解。 本文首先从组件和分布式多数据库的基本原理出发，详细讨论了模式集成和查询分解技术与EJB、CORBA等组件技术在ORACLE8i／9i数据库中的应用。数据模式集成和查询分解是本文探讨的重点，也是分布式多数据库的核心内容。我在提出一个合理的模式冲突分类框架的基础上，探讨了如何运用组件技术的低耦合、高内聚的良好特性来实现数据模式集成和查询分解的策略；同时，运用组件技术的独立性和可装配的优点，设计了一个改进的联邦数据库体系结构模型。 最后，在上述理论的指导下，本人与协作者完成了湖南省审计厅信息集成原型系统的设计和开发，总体上证实了改进后联邦数据库体系结构模型的可行性。更多还原

【Abstract】 Owing to history and technology, most databases on the Internet/Intranet are distributed and heterogeneous. Sometimes The huge relevant information in those databases should be managed unitedly,, So, it is getting more and more critical to develop applications for building systems that combine relevant data from database sources and present them in a form which is comprehensible for usersBeginning with the basic theory of module and distributed multidatabase, this Paper discusses the technologies about the EJB, CORBA component used in the Oracle8i/9i database , the Schema Integration and Query Decomposition,, Schema Integration and Query Decomposition are key segment of this thesis. They are kernel knowledge of distributed multidatabase too0 Then, based on a reasonable classified frame of Schema collision , the paper probes into the strategies realizing Schema Integration and Query Decomposition using the good "low coupling, high cohesion" characteristics of component; And then, a improved model of federal database architecture is designed exerting the virtue of independence and assembly of component<,At last, I had completed the work of developing a demo for the integration of audit information systems with the helps of others, which proved that the improved model of federal database architecture ispracticalo更多还原