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A Middleware Implementation of Active Rules for ODBMS
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S.B. Yoo,
K.C. Kim, and
S.K. Cha
View Paper (PDF)
Return to Session 6B: Distributed Databases
Throughout many research and development projects for
active rule systems, active rules are implemented with different syntaxes and
semantics. It becomes one of the stumbling blocks to apply active database systems
especially in networked heterogeneous multidatabase environments. Utilizing the
recent development of CORBA and ODMG standards, a middleware approach to
provide active rule systems for heterogeneous ODBMS is presented in this paper.
The active rule system described is applied for integrity maintenance of
spatial objects. According to the events included in application programs, the
active rules represented in ECA type are inserted into the program by a preprocessor.
One advantage of this compile approach is that the preprocessed program can be
compiled and executed without the overhead of runtime monitoring. For the
changed rules after compilation, a run time interpreter is included in the
executable program.
Copyright(C) 2000 ACM
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