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Database design by computer-aided schema transformations

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1 Author(s)
Van Bommel, P. ; Dept. of Inf. Syst., Nijmegen Univ., Netherlands

The focus of the paper is schema transformation during the development of an information system. A framework is described for conversion and transformation of conceptual (semantic) data models and their internal (machine-oriented) representations. This framework allows us to `walk' through the solution space of candidate internal representations for a given conceptual data model. This walk may be randomised or performance driven, where storage requirements and average response times are combined in a multi-objective fitness function. Furthermore, a wide variety of control parameters may be embedded, such as preferences for database table size, absence of data redundancy or absence of optional database fields. Basic experimental results produced by a prototype convertor/transformer are presented, including deviations from the standard optimal normal form for databases

Published in:

Software Engineering Journal  (Volume:10 ,  Issue: 4 )