Keyphrases
- conjunctive queries
- integrity constraints
- query evaluation
- query answering
- data complexity
- np complete
- query language
- query rewriting
- special case
- query containment
- decision procedures
- data exchange
- dynamic environments
- containment of conjunctive queries
- bounded treewidth
- boolean expressions
- conjunctive regular path queries
- tuple generating dependencies
- probabilistic databases
- dl lite
- transitive closure