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Authors: Cecilia Delgado 1 ; José Samos 1 and Manuel Torres 2

Affiliations: 1 Universidad de Granada, Spain ; 2 Universidad de Almería, Spain

ISBN: 972-8865-00-7

Keyword(s): Schema Evolution, Object-Oriented Databases, External Schemas, Schema Changes.

Related Ontology Subjects/Areas/Topics: Databases and Information Systems Integration ; Enterprise Information Systems ; Object-Oriented Database Systems

Abstract: Schema evolution is the process of applying changes to a schema in a consistent way and propagating these changes to the instances while the database is in operation. However, when a database is shared by many users, updates to the database schema are always difficult. To overcome this problem, in this paper we propose a version mechanism for schema evolution in ODMG databases that preserves old schemas for continued support of existing programs running on the shared database when schema changes are produced. Our approach uses external schema definition techniques and is based on the fact that if a schema change is requested on an external schema, rather than modifying the schema, a new schema, which reflects the semantics of the schema change, is defined.

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Paper citation in several formats:
Delgado C.; Samos J.; Torres M. and (2004). AN APPROACH FOR SCHEMA EVOLUTION IN ODMG DATABASES.In Proceedings of the Sixth International Conference on Enterprise Information Systems - Volume 1: ICEIS, ISBN 972-8865-00-7, pages 136-141. DOI: 10.5220/0002617901360141

@conference{iceis04,
author={Cecilia Delgado and José Samos and Manuel Torres},
title={AN APPROACH FOR SCHEMA EVOLUTION IN ODMG DATABASES},
booktitle={Proceedings of the Sixth International Conference on Enterprise Information Systems - Volume 1: ICEIS,},
year={2004},
pages={136-141},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002617901360141},
isbn={972-8865-00-7},
}

TY - CONF

JO - Proceedings of the Sixth International Conference on Enterprise Information Systems - Volume 1: ICEIS,
TI - AN APPROACH FOR SCHEMA EVOLUTION IN ODMG DATABASES
SN - 972-8865-00-7
AU - Delgado, C.
AU - Samos, J.
AU - Torres, M.
PY - 2004
SP - 136
EP - 141
DO - 10.5220/0002617901360141

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