A Database Evolution Approach for Object-Oriented Databases

  • Authors:
  • Awais Rashid

  • Affiliations:
  • Lancaster University

  • Venue:
  • ICSM '01 Proceedings of the IEEE International Conference on Software Maintenance (ICSM'01)
  • Year:
  • 2001

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Abstract

This paper describes a composite evolution approach which integrates the evolution of the various types of entities in an object-oriented database into one model. The approach provides maintainers with a coherent and comprehensible view of the system and at the same time maintains change histories at a fine granularity. Links among meta-objects are implemented using dynamic relationships which are semantic constructs and first-class objects. Referential integrity is maintained by the relationships architecture reducing the evolution complexity at the meta-object level. A customisable and exchangeable instance adaptation approach is proposed. The approach is based on separating the instance adaptation code from class versions using aspects, abstractions used in Aspect-Oriented Programming to localise crosscutting concerns. A high level object-oriented model offering transparent access to the proposed evolution functionality is provided. Keywords: Object oriented databases, object database evolution, schema evolution, class versioning, object versioning, separation of concerns, aspect-oriented programming