Mapping-equivalence and oid-equivalence of single-function object-creating conjunctive queries.
Angela BonifatiWerner NuttRiccardo TorloneJan Van den BusschePublished in: VLDB J. (2016)
Keyphrases
- conjunctive queries
- query containment
- datalog programs
- query answering
- query evaluation
- integrity constraints
- data complexity
- np complete
- decision procedures
- query language
- special case
- probabilistic databases
- tight complexity bounds
- containment of conjunctive queries
- complex objects
- data exchange
- temporal data
- data mining
- fixpoint
- incomplete information
- boolean expressions
- hypertree decomposition
- databases