Integrity aspects of a shared data base

Authors:
Eduardo B. Fernandez;Rita C. Summers
Affiliations:
IBM Los Angeles Scientific Center, Los Angeles, California;IBM Los Angeles Scientific Center, Los Angeles, California
Venue:
AFIPS '76 Proceedings of the June 7-10, 1976, national computer conference and exposition
Year:
1976

Citing 9
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Abstract

A simple model is formulated to represent integrity constraints and to describe the evaluation and enforcement of these constraints in a shared data base environment. The proposed model is applied to define the integrity facilities of a relational data base. This data base consists of a set of base relations, which are presented to the user through application-oriented views. These views are basically joins or projections of the base relations, and the data base is accessed through a language which by referring to predefined views, makes explicit the intentions of application programs. The types of integrity rules incorporated in this system, their description, their evaluation, and the propagation of changes to views into the shared data base, are discussed.