| 面向对象数据库中的视图 |
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| 引用本文： | 刘念祖.面向对象数据库中的视图[J].上海第二工业大学学报,1998,15(1):10-15. |
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| 作者姓名： | 刘念祖 |
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| 作者单位： | 上海第二工业大学计算机系 |
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| 摘 要： | 本文将在Ｓｍａｌｌｔａｌｋ环境中讨论面向对象数据库（ＯＯＤＢ）中的视图实现方法。首先定义一些基本方法来工程师个类的所有实例和子类；然后提出用虚类和结构视图来实现视图机制的方法。
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| 关 键 词： | 面向对象 数据库 视图 虚类 结构视图 |
A View in Object-oriented Database Systems |
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| Abstract: | This paper mainly discusses the realization mechanism of views in Object-oriented Database(OODB),especially in the environment of Smalltalk. In this paper, some basic methods are first defined to obtain all the instances and subclasses of a class, and the method that the view mechanism is realized by virtual classes(a wide variety of views defined by a Smalltalk program) and structural views(the subclass-superclass hierarchies obtained to change all the classes, in which a user is not interested, into abstract classes) is given. |
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| Keywords: | object-oriented database view virtual class structural view |
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