An object algebra for object-oriented database systems

A Query Algebra for an Extended Object-Oriented Database Model

In this paper we extend the objecf-oriented dalabase model via the concept of object inheritance. We then define a closed and safe object-oriented query algebra. Our algebra is different from any other object-oriented query algebra found in the literature due to the extension of the model with object inheritance. The algebra defined deals with homogeneous sets of objects, and provides the model...

Schema Integration for Object Oriented Database Systems

View integration is an important technique for developing software systems built upon large databases independent which paradigm is used for realizing the database. We analyzed to which extent traditional view integration methods cover all aspects of object-oriented datamodels and found, in particular, that the integration of methods is hardly supported. We present a methodology for integrating...

For Indexing Object Oriented Database Systems

Although object oriented database systems o er more powerful modeling capability than relational database systems their performance su ers from the increased complexity in the data model Thus e cient index mech anisms must be used to improve the performance In this paper two new signature methods for indexing object oriented databases and the associated operations are de scribed The cost models...

Metamodel for Object-Oriented Database Management Systems

Benchmarking Object-Oriented Database Systems for CAD

Object-oriented databases integrated into a C++ software engineering environment promise an appealing platform for managing complex data and engineering tasks. In competitive markets like CAD for civil engineering and architecture stringent reliability and performance criteria must be met before entering into commercial products. We present a benchmark study speciically tailored to such CAD dom...