Keyphrases
- conjunctive queries
- query answering
- query evaluation
- integrity constraints
- np complete
- data complexity
- query language
- special case
- data exchange
- query rewriting
- decision procedures
- probabilistic databases
- bounded treewidth
- boolean expressions
- query containment
- queries using views
- datalog programs
- conjunctive regular path queries
- data integration
- database systems
- dl lite
- np hard
- data management
- unions of conjunctive queries
- tuple generating dependencies
- schema mappings