Taming the Infinite Chase: Query Answering under Expressive Relational Constraints.
Andrea CalìGeorg GottlobMichael KiferPublished in: KR (2008)
Keyphrases
- query answering
- data exchange
- consistency checking
- query containment
- data complexity
- conjunctive queries
- integrity constraints
- data integration
- inconsistent databases
- incomplete information
- answering queries
- tight complexity bounds
- regular path queries
- relational databases
- query rewriting
- data model
- tuple generating dependencies
- database schema
- complexity of query answering
- datalog programs
- deductive databases
- schema mappings
- ontology based data access
- computational complexity
- xml data exchange