The Complexity of Resilience and Responsibility for Self-Join-Free Conjunctive Queries.
Cibele FreireWolfgang GatterbauerNeil ImmermanAlexandra MeliouPublished in: Proc. VLDB Endow. (2015)
Keyphrases
- conjunctive queries
- join queries
- conjunctive query containment
- integrity constraints
- query evaluation
- query answering
- conjunctive regular path queries
- conp complete
- data complexity
- np complete
- data exchange
- special case
- query language
- primary key
- query rewriting
- bounded treewidth
- query processing
- query containment
- schema mappings
- probabilistic databases
- datalog programs
- containment of conjunctive queries
- decision procedures
- boolean expressions
- lower complexity
- regular path queries
- unions of conjunctive queries
- fixed parameter tractable
- pspace complete
- join algorithms
- incomplete information
- decision problems
- database