Mapping-equivalence and oid-equivalence of single-function object-creating conjunctive queries.
Angela BonifatiWerner NuttRiccardo TorloneJan Van den BusschePublished in: CoRR (2015)
Keyphrases
- boolean expressions
- conjunctive queries
- query containment
- datalog programs
- query answering
- query evaluation
- integrity constraints
- data complexity
- np complete
- query language
- data exchange
- query rewriting
- decision procedures
- special case
- probabilistic databases
- containment of conjunctive queries
- tight complexity bounds
- regular path queries
- regular expressions
- deductive databases
- expressive power