Towards an Accommodation of Delay in Temporal Active Databases

J. F. Roddick, M. Schrefl
Schr00b (2000)
Maria E. Orlowska (ed.): Proceedings of the 11th Australasian Database Conference (ADC 2000), January 31 - February 3, 2000, Canberra, Australia, Australian Computer Science Communications, Vol. 22, No. 2, IEEE Computer Society Press, ISBN 0-7695-0528-7, pp. 115-119, 2000.
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Business rules can be formulated according to the event-condition-action structure of triggers in active databases. However, delays in the execution of such rules can cause unexpected and undesired side-effects. While business rules are commonly constructed from an external user’s perspective, users often neglect to cater for the cases in which unanticipated sequences of I/O and rule activation events occur. This paper examines this issue from the perspective of temporal databases and discusses a framework for accommodating delay in rule activation. In order to do this the paper also outlines a flexible technique to ensure correct transaction sequencing in transaction-time databases.