Search: in, Mapping evolution, Theory

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Update Semantics of Relational Views

... A database view is a portion of the data structured in a way suitable to a specific on views must be translated into updates on the underlying database. This translation process in the relational model. The procedure is as follows: first, a “complete” ...

Publication - erhard - 04/17/2013 - 09:38 - 0 comments - 0 attachments

Maintenance of views

... 970.14 KB In relational databases a view definition is a query against the database, and ... materialization over a database may change as relations in the database undergo modificationsIn this paper a mechanism is proposed in which the view is materialized at all times The problem which this mechanism ...

Publication - cat - 04/17/2013 - 08:05 - 0 comments - 1 attachment

Evolving the Implementation of ISA Relationships in EER Schemas

... Proceedings of the Workshop on Evolution and Change in Data Management (ECDM 2006), LNCS 4231, pp. 237-246 ... problems related to database evolution is how to reflect in the data level the changes that have occurred in the conceptual schema of ...

Publication - jlloret - 04/16/2013 - 06:05 - 0 comments - 0 attachments

Managing Schema Mappings in Highly Heterogeneous Environments

... administrators are called on to write complex mappings in which they specify in tedious detail how the data is to be transformed. Even once deployed, ...

Publication - cat - 04/16/2013 - 02:38 - 0 comments - 0 attachments