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CP
2008
Springer
13 years 6 months ago
Reformulating Positive Table Constraints Using Functional Dependencies
Constraints that are defined by tables of allowed tuples of assignments are common in constraint programming. In this paper we present an approach to reformulating table constraint...
Hadrien Cambazard, Barry O'Sullivan
CONSTRAINTS
2008
70views more  CONSTRAINTS 2008»
13 years 5 months ago
Reformulating Table Constraints using Functional Dependencies - An Application to Explanation Generation
We present a novel approach to automatically reformulating constraints defined as tables of allowed assignments to variables. Constraints of this form are common in a variety of se...
Hadrien Cambazard, Barry O'Sullivan
CONSTRAINTS
2010
116views more  CONSTRAINTS 2010»
13 years 5 months ago
Erratum to "Reformulating table constraints using functional dependencies - an application to explanation generation"
Abstract. We had claimed that arc-consistency is preserved in a constraint reformulation relying on functional dependencies (Theorem 2 of [2]). We show that the statement of this t...
Hadrien Cambazard, Barry O'Sullivan
JFP
2007
104views more  JFP 2007»
13 years 4 months ago
Understanding functional dependencies via constraint handling rules
Functional dependencies are a popular and useful extension to Haskell style type classes. We give a reformulation of functional dependencies in terms of Constraint Handling Rules ...
Martin Sulzmann, Gregory J. Duck, Simon L. Peyton ...
PODS
2010
ACM
197views Database» more  PODS 2010»
13 years 5 months ago
When data dependencies over SQL tables meet the logics of paradox and S-3
We study functional and multivalued dependencies over SQL tables with NOT NULL constraints. Under a no-information interpretation of null values we develop tools for reasoning. We...
Sven Hartmann, Sebastian Link