An investigation of the view update problem for object-oriented views

Abstract

An investigation of the view update problem for object-oriented views is presented. Views are formed using an object algebra that provides a set-oriented approach to the retrieval of objects. A view is defined to include an intension and an extension, where the extension of a view is updated by modifying objects in the scope of the query intension. The rich set of semantic constraints inherent in an object-oriented data model, enhanced with semantic modeling concepts, helps to make the effects of view updates explicit. The contribution of this research is the development of an approach for analyzing semantic constraints associated with the view intension to (1) identify alternative view update translations and (2) identify potential update side effects. The approach can be used to help in the design of view update operations that correctly reflect the intended semantics of the update.<>