EnglishThe purpose of semantic query optimization is to use semantic knowledge (e.g. integrity constraints) for transforming a query into a form that may be answered more efficiently than the original version. This paper proposes a general method for semantic query optimization in the framework of Object Oriented Database Systems. The method is applicable to the class of conjunctive queries and is based on two ingredients: a formalism able to express both class descriptions and integrity constraints rules as types; subsumption computation between types to evaluate the logical implications expressed by integrity constraints rules.
| Data di pubblicazione: | 1996 |
| Titolo: | Semantic Query Optimization by Subsumption in OODB |
| Autore/i: | D. BENEVENTANO; S. BERGAMASCHI; C. SARTORI |
| Autore/i UNIMORE: | |
| Nome del convegno: | Flexible Query-Answering Systems |
| Luogo del convegno: | Roskilde (Denmark) |
| Data del convegno: | May 22-24, 1996 |
| Tipologia | Relazione in Atti di Convegno |
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