Querying and Updating Advanced Database Systems: Languages and Computational Aspects

近年来，数据库领域迅速发展，以满足高级应用程序的新需求。数据库现在必须处理各种各样的数据类型，从关系到文本，顺序，空间，音频等数据越来越异构，全球分布在各种来源。而且，应用程序越来越需要诸如主动性之类的功能。这些发展对查询和更新语言的设计和实现提出了新的挑战，并提出了需要制定具体的，有原则的方法的根本性的新问题。拟议的研究的目的是开发这样的方法来查询和更新先进的数据库系统，主要集中在逻辑层面：语言和计算方面。预计该项目的成果将使人们更好地了解当前数据库系统面临的基本问题，并将提供工具，促进查询和更新语言的原则性设计和实施。它们将在几个快速发展的领域促进技术进步：在Web上表示和查询信息，需要主动能力的应用程序（如电子商务），以及处理异构数据的应用程序（如空间数据库）。 http://www-cse.ucsd.edu/users/vianu/IIS-9802288.html

The area of databases has evolved rapidly in recent years in response to new requirements of advanced applications. Databases must now handle a wide variety of data types, ranging from relational to textual, sequential, spatial, audio, etc. Data is increasingly heterogeneous and globally distributed among a variety of sources. And, applications increasingly require functionalities such as activeness. These developments pose new challenges to the design and implementation of query and update languages, and raise fundamentally novel issues that require developing specific, principled approaches. The aim of the proposed research is to develop such approaches to querying and updating advanced database systems, focusing primarily on the logical level: languages and computational aspects. The results of the project are expected to yield better understanding of basic problems facing current database systems, and will provide tools to facilitate the principled design and implementation of query and update languages. They will contribute to technological advances in several fast-developing areas: representing and querying information on the Web, applications requiring activeness capabilities (such as electronic commerce), and applications handling heterogeneous data (such as spatial databases). http://www-cse.ucsd.edu/users/vianu/IIS-9802288.html