Conjunctive queries over trees.
Georg GottlobChristoph KochKlaus U. SchulzPublished in: J. ACM (2006)
Keyphrases
- conjunctive queries
- query evaluation
- integrity constraints
- query answering
- data complexity
- boolean expressions
- query language
- np complete
- data exchange
- query rewriting
- special case
- decision procedures
- query containment
- probabilistic databases
- decision trees
- containment of conjunctive queries
- tree structure
- database
- unions of conjunctive queries
- dl lite
- datalog programs
- acyclic conjunctive queries
- query processing
- data sets
- answering queries using views
- conjunctive regular path queries
- tuple generating dependencies
- relational queries
- deductive databases
- incomplete information
- relational databases