Specifying Object-oriented Federated Database from Existing Databases

• Main Authors: LIM, Ee Peng, LIM, M. L., SRIVASTAVA, J.
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 1996
• Subjects: Databases and Information Systems; Numerical Analysis and Scientific Computing
• Online Access: https://ink.library.smu.edu.sg/sis_research/908; https://ink.library.smu.edu.sg/context/sis_research/article/1907/viewcontent/SpecifyOOFedDBExitingDB_1996.pdf
• Institution: Singapore Management University

In this paper, we present a mapping strategy that is based on a proposed set of DB integration operations. We first define an OO federated DB as a virtual view on multiple OO export DBs. Our DB mapping strategy systematically derives each of the class extents, deep class extents and relationships of the federated DB using an operator tree consisting of the integration operations. This mapping approach differs from the other existing approaches in that it is algebraic based, and is therefore very suitable for implementing federated query processing.