Conjunctive Queries with Constraints: Homomorphism, Containment and Rewriting.
Ali KianiNematollaah ShiriPublished in: FoIKS (2010)
Keyphrases
- conjunctive queries
- query containment
- regular path queries
- unions of conjunctive queries
- query answering
- integrity constraints
- query evaluation
- np complete
- query rewriting
- data complexity
- special case
- query language
- queries using views
- rewriting queries using views
- decision procedures
- datalog programs
- datalog queries
- primary key
- probabilistic databases
- tuple generating dependencies
- data exchange
- containment of conjunctive queries
- conp complete
- boolean expressions
- conjunctive regular path queries
- relational queries
- regular expressions
- incomplete information
- data integration
- bounded treewidth
- inclusion dependencies
- dl lite
- deductive databases
- uncertain data
- schema mappings
- data model
- answering queries using views
- databases