Query modification in object-oriented database federations

Author

Vermeer, Mark W W ; Apers, Peter M G

Author_Institution

Center for Telematics & Inf. Technol., Twente Univ., Enschede, Netherlands

fYear

1997

fDate

24-27 Jun 1997

Firstpage

193

Lastpage

202

Abstract

We discuss the modification of queries against an integrated view in a federation of object-oriented databases. We present a generalisation of existing algorithms for simple global query processing that works for arbitrarily defined integration classes. We then extend this algorithm to deal with object-oriented features such as queries involving path expressions and nesting. We show how properties of the OO-style of modelling relationships through object references can be exploited to reduce the number of subqueries necessary to evaluate such queries

Keywords

database theory; distributed databases; object-oriented databases; query processing; arbitrarily defined integration classes; global query processing; integrated view; nesting; object references; object relationship modeling; object-oriented database federations; path expressions; query modification; Data models; Information technology; Object oriented databases; Object oriented modeling; Query processing; Spatial databases; Telematics;

fLanguage

English

Publisher

ieee

Conference_Titel

Cooperative Information Systems, 1997. COOPIS '97., Proceedings of the Second IFCIS International Conference on

Conference_Location

Kiawah Island, SC

Print_ISBN

0-8186-7946-8

Type

conf

DOI

10.1109/COOPIS.1997.613816

Filename

613816