Transformation d'une question à partir de ses propriétés sémantiques analysées en termes d'algèbre relationnelle. Cadre général d'une étude logique sujet à de nombreuses applications possibles
In this paper the problem of query transformation by using semantic properties of data is addressed. First a formal definition of semantic properties is given in framework of relational algebra and the concept of minimal properties is presented. Then two theorems stating the correctness for a class of query transformations are presented. The theorems ensure that the query obtained by applying the transformations to a given query is semantically equivalent to original query.
Semantic query transformation
Musto D
1986
Abstract
In this paper the problem of query transformation by using semantic properties of data is addressed. First a formal definition of semantic properties is given in framework of relational algebra and the concept of minimal properties is presented. Then two theorems stating the correctness for a class of query transformations are presented. The theorems ensure that the query obtained by applying the transformations to a given query is semantically equivalent to original query.| File | Dimensione | Formato | |
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Descrizione: Semantic Query Transformation
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