Export Database Derivation in Object-Oriented Wrappers
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.
Databases and Information Systems | Numerical Analysis and Scientific Computing
Data Management and Analytics
Information and Software Technology
LIM, Ee Peng and LEE, Hou-Kuan.
Export Database Derivation in Object-Oriented Wrappers. (1999). Information and Software Technology. 41, (4), 183-196. Research Collection School Of Information Systems.
Available at: http://ink.library.smu.edu.sg/sis_research/68