Title :
The role of polymorphism in schema evolution in an object-oriented database
Author :
Osborn, Sylvia L.
Author_Institution :
Dept. of Comput. Sci., Univ. of Western Ontario, London, Ont., Canada
fDate :
9/1/1989 12:00:00 AM
Abstract :
A polymorphic object algebra for an object-oriented database model is introduced. Types of schema modification that follow naturally from this model are described. It is shown to what extent queries return identical or equivalent results when the objects in the database are modified to conform to a modified schema
Keywords :
database management systems; database theory; object-oriented programming; model; object-oriented database; polymorphic object algebra; polymorphism; schema evolution; Aggregates; Algebra; Data models; Database languages; Database systems; Indexes; Object oriented databases; Object oriented modeling; Object oriented programming; Relational databases;
Journal_Title :
Knowledge and Data Engineering, IEEE Transactions on
