Harnessing Active Database Abstraction to Support Distributed Workstation-based Applications

传统的DBMS是被动的：它们执行查询或 仅当用户明确请求时才执行事务 或应用程序。许多非传统的应用， 例如CIM、过程控制、医院监视系统、空气 交通控制和办公工作流程控制，这需要 对（危急）情况的及时反应没有得到很好的服务， 这些被动的DBMS。 对于这些应用，重要的是 监视在数据库的状态上定义的条件，以及 然后，当这些条件发生时，调用指定的操作。 这个项目推进了PI以前在活动数据库上的工作 通过i）巩固对活动数据库的早期研究，以及ii） 扩展活动数据库范例以有效地支持 需要分布式工作站的非传统应用程序 配置.此扩展有助于智能地将 数据库和一个或多个工作站之间的数据， 提供了一种更新传播机制。分布式 研究状态监控以实现上述目的。 本研究的结果将减轻应用 程序员在工作站从共享数据的管理 在工作站和数据库之间， 共享数据的一致性。本研究的目的是 在用户级别上使用活动的 数据库作为底层抽象。

Traditional DBMSs are passive: they execute queries or transactions only when explicitly requested to do so by a user or an application program. Many non-traditional applications, such as CIM, process control, hospital monitoring systems, air traffic control, and office workflow control, which require timely response to (critical) situations are not well served by these passive DBMSs. For these applications, it is important to monitor conditions defined on the states of the database, and then, when these conditions occur, invoke specified actions. This project advances previous work on active databases by the PI by i) consolidating earlier research on active databases and ii) extending the active database paradigm to efficiently support non-traditional applications requiring distributed workstation configuration. This extension helps in intelligently staging the data between the database and one or more workstations and also provides a mechanism for update propagation. Distributed condition monitoring is investigated to achieve the above. The results of this research will relieve the application programmer at the workstation from the management of shared data between the workstation and the database as well as maintaining the consistency of shared data. This research is aimed at providing 'staging transparency' at the user level using active database as an underlying abstraction.