Contributo in volume, 1999, ENG, 10.1007/978-3-642-59623-0_36
Rabitti F.; Benedetti L.; Demi F.
CNR-CNUCE, Pisa, Italy; CNR-CNUCE, Pisa, Italy; CNR-CNUCE, Pisa, Italy; CNR-IEI, Pisa, Italy
An approach to query processing in object-oriented stores supporting physical data independence is proposed in this Chapter. In particular, the problem of query optimisation (i e finding efficient execution plans for declarative queries) is investigated. A set of rewrite rules has been defined in order to allow an algebraic optimisation phase. A local search procedure, based on a cost model of the store, has been tailored to the task of physical optimisation. To support the physical data independence in the store, a translation algorithm, dealing with the actual storage organisation of the database, has been studied. A comprehensive example illustrates these mechanisms. Finally, performance results are presented.
Query processing, PIOS, Physically independent object server
ISTI – Istituto di scienza e tecnologie dell'informazione "Alessandro Faedo"
ID: 407771
Year: 1999
Type: Contributo in volume
Creation: 2019-10-14 16:18:58.000
Last update: 2019-10-14 16:18:58.000
CNR authors
External IDs
CNR OAI-PMH: oai:it.cnr:prodotti:407771
DOI: 10.1007/978-3-642-59623-0_36