Transformação de esquema relacional para esquema orientado a objeto em sistemas de banco de dados heterogeneos

AUTOR(ES)
DATA DE PUBLICAÇÃO

1996

RESUMO

This work presents an algorithm that transforms relational schemas to object -oriented schemas in a heterogeneous multidatabase system. In this context, schema transformation is a necessary step before query processing. The implementation of the algorithm has the following special features: it transforms schemas between two commercial database systems, specifically from Sybase relational schemas to 02 objectoriented schemas; it initiates limited interactive sessions between the schema transformer and its user when additional input to the schema transformer is necessary, although most of the transformation is automated; the transformed schemas are typical object-oriented schemas that may contain class hierarchies, composition hierarchies, set attributes and subtuple constructs; and the number of classes in the transformed object-oriented schema is relatively small. compared with the number of relations in the equivalent relational schema

ASSUNTO(S)

query (sistema de recuperação da informação) banco de dados orientado a objetos banco de dados distribuidos

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