Keyphrases
- conjunctive queries
- query answering
- integrity constraints
- query evaluation
- query language
- np complete
- data complexity
- data exchange
- query containment
- probabilistic databases
- query rewriting
- special case
- temporal information
- containment of conjunctive queries
- queries using views
- boolean expressions
- decision procedures
- regular path queries
- relational queries
- datalog programs
- temporal reasoning
- computational complexity
- answering queries using views
- answering queries
- bounded treewidth
- unions of conjunctive queries
- conp complete
- tuple generating dependencies
- incomplete information
- conjunctive query containment
- xml data