Answering Conjunctive Queries under Updates.
Christoph BerkholzJens KeppelerNicole SchweikardtPublished in: PODS (2017)
Keyphrases
- conjunctive queries
- query answering
- data exchange
- data complexity
- integrity constraints
- answering queries
- query containment
- query rewriting
- data integration
- query evaluation
- query language
- decision procedures
- np complete
- incomplete information
- datalog programs
- probabilistic databases
- dl lite
- tuple generating dependencies
- schema mappings
- tight complexity bounds
- relational algebra
- bounded treewidth
- boolean expressions
- unions of conjunctive queries
- lower bound
- containment of conjunctive queries