Enhancing ECA Rules for Distributed Active Database Systems

Heimrich, Thomas and Specht, Günther (2002) Enhancing ECA Rules for Distributed Active Database Systems. In: Web, Web-Services, and Database Systems (NODe '02), Web- and Database-Related Workshops, Erfurt, Germany.

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ECA (event/condition/action) rules have been developed for central active database systems. In distributed active database systems the problem of inaccessibility of partial systems raises and thus the undecidability of ECA conditions
referring to remote systems. This work proposes an enhancement of ECA rules for distributed active database systems to react also in the case of inaccessibility and undecidability. Therefore, the ECA evaluation will be enhanced to a strict function with the inaccessibility state Ω and a new alternative action AA enriches the classical ECA rules. The advantages and the usage of this approach are shown by an example of maintaining data consistency in distributed active database systems.

Item Type: Conference or Workshop Item (Paper)
Subjects: DBIS Research > Publications
Divisions: Faculty of Engineering, Electronics and Computer Science > Institute of Databases and Informations Systems > DBIS Research and Teaching > DBIS Research > Publications
Depositing User: Eva Mader
Date Deposited: 21 Apr 2008 10:10
Last Modified: 14 Oct 2011 10:24
URI: http://dbis.eprints.uni-ulm.de/id/eprint/219

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