Advances in Databases and Information Systems: Third East by Günther Pernul, Alexander W. Röhm, Gaby Herrmann (auth.),

By Günther Pernul, Alexander W. Röhm, Gaby Herrmann (auth.), Johann Eder, Ivan Rozman, Tatjana Welzer (eds.)

The third japanese ecu convention on Advances in Databases and data platforms (ADBIS’99) came about on 13-16- September 1999, in Maribor, Slovenia. It was once equipped in cooperation with ACM SIGMOD, the Moscow bankruptcy of ACM SIGMOD, Slovenian Society Informatika, and the Slovenian Ministry of expertise. the purpose of the ADBIS sequence of meetings is to supply a discussion board for the alternate of clinical achievements and reviews utilizing leading edge equipment and methods among the learn groups of crucial and jap Europe and the remainder of the area within the sector of databases and data platforms. The 1999 convention keeps the sequence of ADBIS occasions held in Moscow, St. Petersburg, and Poznan. The ADBIS guidance committee has the ambition to make the ADBIS convention the most effective database and data structures convention in crucial and japanese Europe, to extend interplay and collaboration among researchers from East and West, and to supply an across the world famous discussion board for the presentation of study and stories in all points of recent database know-how and data platforms. to accomplish those targets a global application committee chosen 26 complete study papers in a rigorous reviewing procedure from a complete of ninety four submissions from 33 varied nations. This excessive variety of submissions from such a lot of assorted parts exhibits the really world wide popularity of and curiosity within the ADBIS series.

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Please note that constraint relationship problem is (efficiently) decidable for a much larger class of constraints. An analysis of these constraints is not the subject of this paper. In [15]we have presented a set of rules to determine the relationship between two dense-order constraints as well as between two uniqueness constraints. Using these rules, the relationship between integrity constraint sets consisting of denseorder and/or uniqueness integrity constraints can be computed in polynomial time.

Se integrity constraints corresponding to the base extensions which are part of that class. - - This approach is now illustrated by a small example. Suppose, there are two schemas as depicted in the figure below. Both schemas models employees and special employees, called managers. However, there are different constraints for employees and managers in the two schemas. In schema Depl employees must be older than 18 and managers older than 30. The salary of each employee must ~onsistentHandling of Integrity Constraints 41 be less than 10000.

R. G. G. Cattell, D. Barry, D. Bartels, M. Berler, S. Gamerman, D. Jordan, A. Springer, H. Strickland, and D. 0, Morgan Kaufmann, 1997. 14, 16, 23, 23 11. N. Gehani and H. V. Jagadish, Ode as Active Database: Constraints and Triggers, Proceedings of the VLDB Conference, pp. 327-336, Morgan Kaufmann, 1991. 25 12. J. Gosling, B. Joy, and G. Steele, The JavaT M Language Specification, AddisonWesley, 1996. 16, 23 13. M. Jordan and M. Atkinson, Orthogonal Persistence for Java - A Mid-term Report, in: R.

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