Item Details

Multiple Inheritance and the Closure of Set Operators in Class Hierarchies

Pfaltz, John; French, James
Format
Report
Author
Pfaltz, John
French, James
Abstract
In this report, we establish essential closures in class hierarchies of database systems that support set operations, such as union and intersection, in their query language. In particular, we rigorously demonstrate that multiple inheritance is an implementation requirement, as is the formal treatment of the class hierarchies as lattices with defined least upper, and greatest lower, bound operators. Note: Abstract extracted from PDF file via OCR
Language
English
Date Received
20121030
Published
University of Virginia, Institute for Parallel Computation, 1992
Published Date
1992
Collection
Libra Open Repository
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