Schema and Database Evolution in the 02 Object Database System
Schema and Database Evolution in the 02 Object Database System
Fabrizio Ferrandina, Thorsten Meyer, Roberto Zicari
Goethe-University, FB 20, Robert Mayer Strasse 11-15, 60054 Frankfurt am Main, Germany
Guy Ferran, Joelle Madec
O2 Technology
7, Rue du Part de Clagny 78000 Versailles, France
Abstract
When the schema of an object-oriented database system is modified, the database needs to be changed in such a way that the schema and the database remain consistent with each other. This paper describes the algorithm implemented in the new forthcoming release of the 02 object database for automatically bringing the database to a consistent state after a schema update has been performed. The algorithm, which uses a deferred strategy to update the database, is a revised and extended version of the screening algorithm first sketched in [7].
Proceedings of the 21th VLDB Conference Zürich, Switzerland, 1995
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