On the Complexity of the Containment Problem for Conjunctive Queries with Built-in Predicates.
Phokion G. KolaitisDavid L. MartinMadhukar N. ThakurPublished in: PODS (1998)
Keyphrases
- conjunctive queries
- conjunctive query containment
- join queries
- datalog programs
- integrity constraints
- query answering
- query evaluation
- data complexity
- boolean expressions
- conp complete
- np complete
- query containment
- conjunctive regular path queries
- query rewriting
- containment of conjunctive queries
- data exchange
- query language
- decision procedures
- lower complexity
- special case
- unions of conjunctive queries
- probabilistic databases
- bounded treewidth
- regular path queries
- fixed parameter tractable
- pspace complete
- incomplete information
- query processing
- dl lite
- data integration
- deductive databases
- computational complexity
- databases