Costal, D. "Un mètode de planificació basat en l'actualització de vistes en bases de dades deductives", PhD Thesis, Barcelona, 1995 (in catalan). Home/Search Document Not in Database Summary Related Articles Check |
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Analysing the Process of Enforcing Integrity Constraints - Mayol, Teniente (1996) (Correct)
....j and, thus, that C i should be handled before than C j . In the following subsections we describe in detail how to obtain the Precedence Graph. We will start by analysing which events are involved in each condition and in which way. To perform this analysis, we use the Dependency Graph of Events [Cos95]. Information provided by this graph allows us to identify dependencies between conditions that are used to set up later the Precedence Graph. Finally, two kinds of optimisations are proposed to remove non feasible dependencies obtaining a graph which states more precisely dependencies between ....
....be base predicates. Before explicitly stating the relationship between repairs and potential violations of conditions associated to integrity constraints, we need to analyse which events are related to each condition and in which way. This information is provided by the Dependency Graph of Events [Cos95] which explicitly states the relationship between events of base and derived predicates with respect to conditions. In section 4.1.1 we review the main concepts regarding this graph. 4.1.1 Dependency Graph of Events [Cos95] A Dependency Graph of Events is a triad V,C,E where V and C are two ....
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Costal, D. "Un mètode de planificació basat en l'actualització de vistes en bases de dades deductives", PhD Thesis, Barcelona, 1995 (in catalan).
Structuring the Process of Integrity Maintenance - Mayol, Teniente (1997) (1 citation) (Correct)
....if there is a rule in A(D) with event C as head and such that E appears in its body. A direct dependence is positive (resp. negative) if E is a positive literal (resp. negative) By considering together all direct dependencies between events and conditions we can build the Events Dependency Graph [Cos95], which explicitly states the relationship between the application of events on a database and their induced effect, and which builds the basis for the process of structuring integrity maintenance. Definition 4.2 An Events Dependency Graph EDG for a set of events and a set of conditions, is a ....
Costal, D. "Un mètode de planificació basat en l'actualització de vistes en bases de dades deductives", PhD Thesis, Barcelona, 1995 (in catalan).
Structuring the Process of Integrity Maintenance - Mayol, Teniente (1997) (1 citation) (Correct)
....if there is a rule in A(D) with event C as head and such that E appears in its body. A direct dependence is positive (resp. negative) if E is a positive literal (resp. negative) By considering together all direct dependencies between events and conditions we can build the Events Dependency Graph [Cos95], which explicitly states the relationship between the application of events on a database and their induced effect, and which builds the basis for the process of structuring integrity maintenance. Definition 4.2 An Events Dependency Graph EDG for a set of events and a set of conditions, is a ....
Costal, D. "Un mètode de planificació basat en l'actualització de vistes en bases de dades deductives", PhD Thesis, Barcelona, 1995 (in catalan).
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