Changes to the schema of databases naturally and frequently occur during the life cycle of information systems; supporting their management, in the context of distributed databases, requires tools to perform changes easily and to propagate them efficiently to the database instances. In this paper we illustrate ENVISION, a project aiming to develop a Visual Tool for Schema Evolution in Distributed Databases to support the database administrator during the schema evolution process. The first stage of this project concerned the design of an instance update language, allowing to perform schema changes in a parallel way [14]; in this paper we deal with further steps toward the complete realization of the project: the choice of a declarative schema update language and the realization of the mechanism for the automatic generation of instance update routines. The architecture of the system, which has been implementing, is also designed.
The ENVISION Project: Towards a Visual Tool to Support Schema Evolution in Distributed Databases
POLESE, Giuseppe;
2009
Abstract
Changes to the schema of databases naturally and frequently occur during the life cycle of information systems; supporting their management, in the context of distributed databases, requires tools to perform changes easily and to propagate them efficiently to the database instances. In this paper we illustrate ENVISION, a project aiming to develop a Visual Tool for Schema Evolution in Distributed Databases to support the database administrator during the schema evolution process. The first stage of this project concerned the design of an instance update language, allowing to perform schema changes in a parallel way [14]; in this paper we deal with further steps toward the complete realization of the project: the choice of a declarative schema update language and the realization of the mechanism for the automatic generation of instance update routines. The architecture of the system, which has been implementing, is also designed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
