Equivalence, query-reachability and satisfiability in Datalog extensions
PODS '93 Proceedings of the twelfth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Semantic query optimization in Datalog programs (extended abstract)
PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Conjunctive query containment with respect to views and constraints
Information Processing Letters
Deciding containment for queries with complex objects (extended abstract)
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
On the containment and equivalence of database queries with linear constraints (extended abstract)
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Principles of Database and Knowledge-Base Systems: Volume II: The New Technologies
Principles of Database and Knowledge-Base Systems: Volume II: The New Technologies
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Updating knowledge bases while maintaining their consistency
The VLDB Journal — The International Journal on Very Large Data Bases
A Generic Subsumption Testing Toolkit for Knowledge Based Queries
DEXA '96 Proceedings of the 7th International Conference on Database and Expert Systems Applications
Query Containment Checking as a View Updating Problem
DEXA '98 Proceedings of the 9th International Conference on Database and Expert Systems Applications
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We present a new method that checks Query Containment for queries with negated derived atoms and/or integrity constraints. Existing methods for Query Containment checking that deal with these cases do not check actually containment but another related property called Uniform Containment, which is a sufficient but not necessary condition for containment. Our method can be seen as an extension of the canonical databases approach beyond the class of conjunctive queries.