Title

Export Database Derivation in Object-Oriented Wrappers

Publication Type

Journal Article

Publication Date

3-1999

Abstract

Wrappers export the schema and data of existing heterogeneous databases and support queries on them. In the context of cooperative information systems, we present a flexible approach to specify the derivation of object-oriented (OO) export databases from local relational databases. Our export database derivation consists of a set of extent derivation structures (EDS) which defines the extent and deep extent of export classes. Having well-defined semantics, the EDS can be readily used in transforming wrapper queries to local queries. Based on the EDS, we developed a wrapper query evaluation strategy which handles OO queries on the export databases. The strategy is unique in that it considers the limited query processing capabilities of local database systems as well as the language constraints on the local query languages.

Discipline

Databases and Information Systems | Numerical Analysis and Scientific Computing

Research Areas

Data Management and Analytics

Publication

Information and Software Technology

Volume

41

Issue

4

First Page

183

Last Page

196

ISSN

0950-5849

Identifier

10.1016/S0950-5849(99)00003-8

Publisher

Elsevier

Additional URL

http://dx.doi.org/10.1016/S0950-5849(99)00003-8