Corba-based Heterogeneous Database Integration

Heterogeneous database integration is an important branch in database research. Many schemes were designed, such as database gateway. ODBC etc. in order to shield the heterogeneity which the integration system has to face. But all these schemes don work very well due to lacking of component thinking and standardization. It difficult to wnplement the system and manage the system. Most of the research in this field is theoretic, and hard to become commodity.Distributed Object Technology stemmed from 1990. It has had rapid development to become the core one in building system integration frames and standard components. It also play important role in the integration of enteiprise resources, the management of distiibuted system and the technology of software components. Many cooperation standards had been published, represented by 0MG CORBA and Microsoft COMIDCOM. CORBA has better performance than others in cross-platform and extensibility, it is also good at integrating existed system. Becouse of these good performance, using CORBA to integrate subsystems will make the integration system easier to manage, easier to extend, easier to maintain and easier to implement.MylBase is a CORBA-based heterogeneous database integration system developed by us. It integrates the local database systems, gives the user a consistently globe view of the local databases by Globe Database. User won feel the heterogeneity of local databases. User query is processed by the Globe Database, which decomposed the query into a set of subqueriesne for each local database. The results coming back from the local database are organized by the Globe Database and then returned to the user.According to the design and implementation of MylBase, this paper discuss the problems in heterogeneous database integration and give our CORBA-based solution. This paper also illustrate the benefits of using CORBA in the procedure of integrating by telling the excellent characteristic of MylBase. This paper will put forward theIIresearch of CORBA-bed heterogeneous dataase integhion SyStem.