Type Evolution and Instance Adaptation

  title={Type Evolution and Instance Adaptation},
  author={Stewart M. Clamen},
Schema evolution support is an important facility for object-oriented database (OODB) systems. While existing OODB systems provide for limited forms of evolution, including modiication to the database schema and reorganization of aaected instances, we nd their support insuucient. Speciic deeciencies are 1) the lack of compatibility support for old applications, and 2) the lack of ability to install arbitrary changes upon the schema and database. This paper examines the limitations of existing… CONTINUE READING

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