Object Oriented Mechanisms to Rewriting Queries Using Views

In this article, we propose an object-oriented approach to rewrite queries using views. Our approach is based on the object-oriented classification reasoning mechanism which is possible thanks to the representation of queries as classes. In our approach, we used results of classification of query-classes, to generate possible rewritings for the corresponding queries. We have proposed two types of rewritings: elementary rewritings and recursive rewritings. Then, query rewriting is possible without limitation of query types. In fact, authorized queries are OQL expressions and query rewriting process can generate query expressions using all existing views.