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On conjunctive queries containing inequalities
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Foundations of deductive databases and logic programming
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Hard problems for simple logic programs
SIGMOD '90 Proceedings of the 1990 ACM SIGMOD international conference on Management of data
Recursive queries and context-free graph grammars
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Multiple SIP strategies and bottom-up adorning in logic query optimization
ICDT '90 Proceedings of the third international conference on database theory on Database theory
Inference of inequality constraints in logic programs (extended abstracts)
PODS '91 Proceedings of the tenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Deriving constraints among argument sizes in logic programs (extended abstract)
PODS '90 Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Constraint query languages (preliminary report)
PODS '90 Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
PODS '90 Proceedings of the ninth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Equivalence, query-reachability and satisfiability in Datalog extensions
PODS '93 Proceedings of the twelfth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Compiling query constraints (extended abstract)
PODS '94 Proceedings of the thirteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Universal finiteness and satisfiability (extended abstract)
PODS '94 Proceedings of the thirteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Database querying and constraint programming
ACM SIGACT News
Constraint programming and database languages: a tutorial
PODS '95 Proceedings of the fourteenth 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
The LyriC language: querying constraint objects
SIGMOD '95 Proceedings of the 1995 ACM SIGMOD international conference on Management of data
ACM Transactions on Database Systems (TODS)
Static analysis of intensional databases in U-Datalog (extended abstract)
PODS '96 Proceedings of the fifteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Answering queries using limited external query processors (extended abstract)
PODS '96 Proceedings of the fifteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Strategic directions in constraint programming
ACM Computing Surveys (CSUR) - Special ACM 50th-anniversary issue: strategic directions in computing research
Constraint databases: promising technology or just intellectual exercise?
ACM Computing Surveys (CSUR) - Special issue: position statements on strategic directions in computing research
Static analysis in datalog extensions
Journal of the ACM (JACM)
Constraint Programming: Strategic Directions
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IEEE Transactions on Knowledge and Data Engineering
The EVE Approach: View Synchronization in Dynamic Distributed Environments
IEEE Transactions on Knowledge and Data Engineering
Static Analysis of Logical Languages with Deferred Update Semantics
IEEE Transactions on Knowledge and Data Engineering
Toward Practical Constraint Databases
VLDB '93 Proceedings of the 19th International Conference on Very Large Data Bases
Queries Independent of Updates
VLDB '93 Proceedings of the 19th International Conference on Very Large Data Bases
Query Optimization by Predicate Move-Around
VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
A history-driven approach at evolving views under meta data changes
Knowledge and Information Systems
Exploiting irrelevance reasoning to guide problem solving
IJCAI'93 Proceedings of the 13th international joint conference on Artifical intelligence - Volume 1
Efficient integrity checking over XML documents
EDBT'06 Proceedings of the 2006 international conference on Current Trends in Database Technology
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Two types of redundancies in datalog program are considered. Redundancy based on reachability eliminates rules and predicates that do not participate in any derivation tree of a fact for the query predicate. Redundancy based on irrelevance is similar, but considers only minimal derivation trees, that is, derivation trees having no pair of identical atoms, such that one is an ancestor of the other. Algorithms for detecting these redundancies are given, including the case of programs with constraint literals. These algorithms not only detect redundancies in the presence of constraints, but also push constraints from the given query and rules to the EDB predicates. Under certain assumptions discussed in the paper, the constraints are pushed to the EDB as tightly as possible.