【摘要】 随着数据库实践中基于分布、异构问题的进一步增多,异构数据库互访的实现需要进一步完善和更新。针对异构数据库互访问题的传统解决方案和利用通用数据库访问技术解决方案的不足———系统复杂度高、系统可扩展性差、系统局限性大,提出了一种异构数据库互访中间件方案。该方案着重于给出公共数据格式、查询语言模式的一个统一标准来规范异构数据库互访的过程。文中详细介绍了该中间件提供的服务功能及实现的关键技术。同时阐述了在实际工作中是如何运用中间件解决异构数据库互访问题的。更多还原

【Abstract】 The database applications based on distributed and heterogeneous problems are increasing rapidly,and the architecture of inter-access of heterogeneous database needs to be perfected and updated. There are some problems to solve the inter-access of heterogeneous database with the traditional strategy and the strategy of common database access technique, which are high system complexity, low system extensiveness and great localization. A strategy of middleware is provided in this paper according to the problems. This strategy emphasizes to present to the united criterion of common data format and query language mode. Hereby the process of inter-access of heterogeneous database can be standardizational. Later,introduce service function and key method of architecture in detail.How to solve similar problems with the strategy of middleware in the real work is explained in this paper, too.更多还原