Extending a relational DBMS to support complex objects

Proceedings. Second International Conference on Data and Knowledge Systems for Manufacturing and Engineering Pub Date : 1989-10-16 DOI:10.1109/DKSME.1989.107451

G. Gardarin, J. Cheiney, J. Kiernan, H. Stora, D. Pastre

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Abstract

The definition and manipulation of complex objects in an extended relational database management system are discussed. Complex object types are defined as relation domains encapsulated within methods written in LISP or C. Objects are structured using the set, array and list constructors concepts. Structured objects are manipulated using built-in functions. For a given application, the database administrator introduces the complex domains with the encapsulating methods within the DBMS meta-base using a specific command. Complex domains can be described using an hierarchy which makes possible the inheritance of methods along domains. The domain methods are directly used in the external data manipulation language, which is an extended version of SQL with object-oriented features. Graphical interface procedures are available to input and display nonstandard data. A fully running version of the system is commercially available for Sun Unix workstations. Only the list constructor is available in the current version.<>

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扩展关系DBMS以支持复杂对象

讨论了扩展关系数据库管理系统中复杂对象的定义和操作。复杂对象类型被定义为封装在用LISP或c编写的方法中的关系域。对象使用集合、数组和列表构造器概念进行结构化。使用内置函数操作结构化对象。对于给定的应用程序，数据库管理员使用特定命令在DBMS元基中引入复杂域和封装方法。复杂的领域可以使用层次结构来描述，这使得沿着领域的方法继承成为可能。域方法直接用于外部数据操作语言，该语言是具有面向对象特性的SQL的扩展版本。图形界面程序可用于输入和显示非标准数据。该系统的完整运行版本可用于Sun Unix工作站。在当前版本中，只有列表构造函数可用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings. Second International Conference on Data and Knowledge Systems for Manufacturing and Engineering

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