Optimal use of triggers for detecting database events

Details Optimal use of triggers for detecting database events Optimal use of triggers for detecting database events

2011-07-19

2011-07-19

Abel-Jalil, Neveen (Department: 2165)

Data processing: database and file management or data structures

File or database maintenance

Database archive

Reexamination Certificate

active

07984021

ABSTRACT:
Triggers are dynamically created and destroyed on an application database. Rules are represented in active databases as ECA (event-condition-action) items, in which an action formulates a reaction to an event and is executed after the rule is triggered when the condition is evaluated to true. The event is defined as an instantaneous and atomic (that is, the event either happens completely, or not at all) point of occurrence within an application. Events can be classified as either database, temporal, or user-defined events, and their type can be either primitive or composite.

REFERENCES:
Umeshwar Dayal, Eric N. Hanson, Jennifer Widom; “Active Database Systems”; Sep. 1994; Addison-Wesley; 0-24.
U. Dayal, B. Blaustein, A. Buchmann, U. Chakravarthy, M. Hsu, R. Ledin, D. McCarthy, A. Rosenthal, S. Sarin , M.J. Carey, M. Livny, R. Jauhari “The HiPAC Project: Combining Active Database and Timing Constraints”,ACM SIGMOD Record, vol. 17, No. 1, pp. 51-70, 1988.

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