DocumentCode :
1599462
Title :
Constraints and triggers in an object-oriented geo database kernel
Author :
Ditt, Hendrik ; Becker, Ludger ; Voigtmann, Andreas ; Winrichs, K.H.
Author_Institution :
Inst. fur Inf., Westfalischen Wilhelms-Univ., Munster, Germany
fYear :
1997
Firstpage :
508
Lastpage :
513
Abstract :
A concept to integrate constraints and triggers into the object-oriented geo database kernel GOODAC is presented. The authors propose an extension of GOODAC´s object definition language to include the definition of constraints and triggers within the class definitions. To reduce the number of constraints, triggers, and possibly affected objects which must be inspected after an update of the database, they provide a mechanism to determine all objects which are subject to constraints and triggers. The basic information needed for this mechanism is obtained by analyzing the class definitions
Keywords :
abstract data types; data structures; database languages; geographic information systems; object-oriented databases; GOODAC object-oriented geographic database kernel; class definitions; constraints; database update; object definition language; objects; triggers; Cities and towns; Data models; Database systems; Geographic Information Systems; Kernel; Object oriented databases; Object oriented modeling; Relational databases; Sections; Spatial databases;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Database and Expert Systems Applications, 1997. Proceedings., Eighth International Workshop on
Conference_Location :
Toulouse
Print_ISBN :
0-8186-8147-0
Type :
conf
DOI :
10.1109/DEXA.1997.617346
Filename :
617346
Link To Document :
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