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A model for schema evolution in temporal relational databases

... CompEuro93; Computers in Design URL:  ... transaction time and valid time are added to the data. In this context, the modification of the schema which a database management ...

Publication - cat - 04/17/2013 - 06:49 - 0 comments - 0 attachments

A Taxonomy for Schema Versioning Based on the Relational and Entity Relationship Models

... Recently there has been increasing interest in both the problems and the potential of accommodating evolving schema in databases, especially in systems which necessitate a high volume of ...

Publication - cat - 04/17/2013 - 05:05 - 0 comments - 0 attachments

Language Extensions for the Automation of Database Schema Evolution

... Systems face the problem of maintaining their systems in the presence of frequently occurring changes in any counterpart of it. In other words, when a change occurs in any point of ...

Publication - gpapas - 04/16/2013 - 08:27 - 0 comments - 1 attachment

Adaptive Query Formulation to Handle Database Evolution

... queries and applications, mainly due to the fact that, in most cases, their role as integral parts of the environment is not given the ... the queries are not designed to handle database evolution. In this paper, we introduce a graph-based model that uniformly captures ...

Publication - gpapas - 04/16/2013 - 07:38 - 0 comments - 1 attachment

Efficient Maintenance of Temporal Data Warehouses

... the entire history of source databases is not stored in the warehouse; the warehouse keeps enough information for its ... (i.e. non-temporal operators). Although temporal views in V are specified in a temporal algebraic query language we translate them into relational ...

Publication - huliganka - 04/16/2013 - 06:27 - 0 comments - 1 attachment

Publishing and querying the histories of archived relational databases in XML

... There is much current interest in publishing and viewing databases as XML documents. The general benefits of ... for visualizing and processing information encoded in this universal standard. In this paper, we explore the additional and unique ...

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

Incremental Maintenance of Schema-Restructuring Views

... 252.55 KB An important issue in data integration is the integration of semantically equivalent but ... source restructuring for such databases have been proposed in the literature, such as the SQL extension SchemaSQL. However, the issue of incremental maintenance of views defined in such languages remains an open problem. We present an incremental view ...

Publication - cat - 04/15/2013 - 22:27 - 0 comments - 1 attachment