Keyphrases
- conjunctive queries
- query rewriting
- query evaluation
- integrity constraints
- query answering
- queries using views
- query language
- np complete
- data complexity
- rewriting queries using views
- special case
- data exchange
- decision procedures
- query containment
- conjunctive query containment
- probabilistic databases
- regular path queries
- conjunctive regular path queries
- answering queries
- dl lite
- bounded treewidth
- functional dependencies
- boolean expressions
- unions of conjunctive queries
- conp complete
- data management
- query processing
- database systems
- database