Browsing by Author "Chomicki, Jan"
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- ItemQuery evaluation in almost consistent databases using residues(IEEE, 1998) Arenas Saavedra, Marcelo Alejandro; Bertossi Duran, Leopoldo; Chomicki, JanThe authors consider the problem of logical characterization of the notion of correct answers in a relational database that may violate given integrity constraints. This notion is captured in terms of the possible repaired versions of the database. A computational counterpart of the semantic notion is provided in terms of the reconstruction of the database as a deductive database to which concepts and techniques from semantic query optimization are applied with the purpose of computing correct answers.
- ItemScalar aggregation in FD-inconsistent databases(2001) Arenas, Marcelo; Bertossi Durán, Leopoldo; Chomicki, Jan; Bussche, Jan Van den; Vianu, Victor