Keyphrases
- conjunctive queries
- mathcal shiq
- np hard
- np complete
- query answering
- integrity constraints
- query evaluation
- data complexity
- query language
- data exchange
- special case
- decision procedures
- propositional logic
- query rewriting
- query containment
- probabilistic databases
- bounded treewidth
- boolean expressions
- schema mappings
- data model
- database
- data sets
- regular path queries
- queries using views
- conjunctive query containment
- hypertree decomposition
- conjunctive regular path queries
- relational queries
- deductive databases
- modal logic
- lower bound
- database systems