Exploració per autor "Rull Fort, Guillem"
Ara es mostren els items 7-11 de 11
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Providing explanations for database schema validation
Rull Fort, Guillem; Farré Tost, Carles; Teniente López, Ernest; Urpí Tubella, Antoni (Universitat Politècnica de Catalunya. Departament de Llenguatges i Sistemes Informàtics, 2008-04-14)
Report de recerca
Accés obertWe propose a new method for database schema validation that provides an explanation when it determines that a certain desirable property of a database schema does not hold. Explanations are required to give the designer a ... -
Query containment in entity SQL
Rull Fort, Guillem; Bernstein, Philip A.; Garcia dos Santos, Ivo; Katsis, Yannis; Melnik, Sergey; Teniente López, Ernest (2013)
Comunicació de congrés
Accés restringit per política de l'editorialWe describe a software architecture we have developed for a constructive containment checker of Entity SQL queries defined over extended ER schemas expressed in Microsoft's Entity Data Model. Our application of interest ... -
Testing Termination of Query Satisfiability Checking on Expressive Database Schemas
Rull Fort, Guillem; Farré Tost, Carles; Teniente López, Ernest; Urpí Tubella, Antoni (2010-03-19)
Report de recerca
Accés obertA query is satisfiable if there is at least one consistent instance of the database in which it has a non-empty answer. Defining queries on a database schema and checking their satisfiability can help the database designer ... -
Validation of mappings between data schemas
Rull Fort, Guillem (Universitat Politècnica de Catalunya, 2011-01-19)
Tesi
Accés obertEn esta tesis, presentamos un nuevo enfoque para validar mappings entre esquemas de datos que permite al diseñador comprobar si el mapping satisface o no ciertas propiedades deseables. La respuesta que obtiene el diseñador ... -
Validation of schema mappings with nested queries
Rull Fort, Guillem; Farré Tost, Carles; Teniente López, Ernest; Urpí Tubella, Antoni (2012-10-11)
Report de recerca
Accés obertWith the emergence of the Web and the wide use of XML for representing data, the ability to map not only flat relational but also nested data has become crucial. The design of schema mappings is a semi-automatic process. ...