Cooperative access to relational and object-oriented federated databases

Author

Lerm, Júlio Cesar Perleberg ; De Oliveira, José Palazzo M

Author_Institution

Inst. de Inf., Univ. Federal do Rio Grande do Sul, Brazil

fYear

1993

fDate

22-24 Sep 1993

Firstpage

222

Lastpage

227

Abstract

Much work has been done in the field of heterogeneous federated database systems (FDBSs), but almost all this work deals with relational systems or, eventually, with the integration of hierarchical and network models and the relational model. The authors present a prototype that allows access to relational (INGRES) and object-oriented (O2) database systems composing a federation. They assume that all databases store equivalent information. Users are allowed to specify queries over one of the component databases and the prototype retrieves equivalent information from the other database using a set of mapping rules. These rules define equivalences between the schemas´ structures of INGRES and O2. The prototype has been implemented in Prolog and C in a network of Sun workstations

Keywords

distributed databases; object-oriented databases; relational databases; FDBS; INGRES; access; federated databases; heterogeneous federated database systems; object oriented database systems; prototype; relational systems; Data models; Database languages; Database systems; Electronic mail; Information retrieval; Object oriented databases; Object oriented modeling; Prototypes; Relational databases; Sun;

fLanguage

English

Publisher

ieee

Conference_Titel

Distributed Computing Systems, 1993., Proceedings of the Fourth Workshop on Future Trends of

Conference_Location

Lisbon

Print_ISBN

0-8186-4430-3

Type

conf

DOI

10.1109/FTDCS.1993.344153

Filename

344153