Database Systems (TODS)


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ACM Transactions on Database Systems (TODS), Volume 20 Issue 4, Dec. 1995

An execution model for limited ambiguity rules and its application to derived data update
I.-Min A. Chen, Richard Hull, Dennis McLeod
Pages: 365-413
DOI: 10.1145/219035.219039
A novel execution model for rule application in active databases is developed and applied to the problem of updating derived data in a database represented using a semantic, object-based database model. The execution model is based on the use of...

A structured approach for the definition of the semantics of active databases
Piero Fraternali, Letizia Tanca
Pages: 414-471
DOI: 10.1145/219035.219042
Active DBMSs couple database technology with rule-based programming to achieve the capability of reaction to database (and possibly external) stimuli, called events. The reactive capabilities of active databases are useful for a...

Space optimization in deductive databases
Divesh Srivastava, S. Sudarshan, Raghu Ramakrishnan, Jeffrey F. Naughton
Pages: 472-516
DOI: 10.1145/219035.219056
In the bottom-up evaluation of logic programs and recursively defined views on databases, all generated facts are usually assumed to be stored until the end of the evaluation. Discarding facts during the evaluation, however, can considerably...