Apothesis ΕΛΜΕΠΑ ::Πλοήγηση ανά Συγγραφέας "Lykakis, Pavlos"

Τώρα δείχνει 1 - 1 of 1

A tool for addressing the ramification problem combined in temporal and spatial databases.
(Τ.Ε.Ι. Κρήτης, Τεχνολογικών Εφαρμογών (Σ.Τ.Εφ), Τμήμα Μηχανικών Πληροφορικής Τ.Ε., 2017-10-04) Lykakis, Pavlos; Λυκάκης, Παύλος
In this paper, we study the ramification problem, both in the setting of geographic databases and setting of chronicle databases. The ramification problems in spatial-temporal databases are complex and multifaceted problems and no satisfactory solution has been proposed as of yet. The ramification problem is concerned with the indirect consequences of an action when integrity constraints exists. As integrity constraints we define criteria which must be satisfied in every transmission at the database. Thus, any change in database have both direct and indirect effects. If that is the case some indirect effects may generated in order to keep intact the integrity constraints. Subsequently we present a tool used in a scenario which uses integrity constraints in order to manage data and keep the database consistent. By producing the appropriate Java and SQL commands we came up to a satisfactory solution.