Indexes for Necessity Queries. Implementation and Performance Evaluation on a Fuzzy Object-Relational Database Management System

In this paper we pose the implementation of the most efficient indexing techniques built on an Fuzzy Object Relational Database Management System, according to the current literature, using the underlying Object Relational Database Management System extension mechanisms, and study and compare their technical feasibility and performance on a real System. Results show that these techniques are very effective and can improve the query execution time in several orders of magnitude with respect to sequential retrieving, being the BT the simpler in terms of implementation feasibility.