Active Database Systems: Triggers and Rules For Advanced Database Processing
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An overview of production rules in database systems
Database researchers have recognized that integrating a production rules facility into a database system provides a uniform mechanism for a number of advanced database features including integrity constraint enforcement, derived data maintenance, triggers, protection, version control, and others. In addition, a database system with rule processing capabilities provides a useful platform for lar...
متن کاملActive Database Systems
Integrating a production rules facility into a database system provides a uniform mechanism for a number of advanced database features including integrity constraint enforcement, derived data maintenance, triggers, alerters, protection, version control, and others. In addition, a database system with rule processing capabilities provides a useful platform for large and e cient knowledge-base an...
متن کاملUsing Smodels (Declarative Logic Programming) to Verify Correctness of Certain Active Rules
In this paper we show that the language of declarative logic programming (DLP) with answer sets and its extensions can be used to specify database evolution due to updates and active rules, and to verify correctness of active rules with respect to a specification described using temporal logic and aggregate operators. We classify the specification of active rules into four kind of constraints w...
متن کاملThe Priority of Rules and the Termination Analysis Using Petri Nets
An active database system is a conventional database system extended with a facility for managing active rules (or triggers). Rules in active database systems can be very difficult to program, due to the unstructured and unpredictable nature of rule processing. In this paper, we propose a method of termination analysis of rules in an active database system based on Petri nets. We consider here ...
متن کاملThe fuzzy logic based ECA rule processing for XML databases
Current needs of E-Commerce transactions require the development of XML database system like relational database systems. Fuzzy concepts are adapted to the field of XML Databases (DB) in order to deal with ambiguous and uncertain data. Incorporating fuzziness into Event Condition Action (ECA) rules would improve the effectiveness of XML DB as it provides much flexibility in defining rules for t...
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