Optimizatioin of a Subclass of Conjunctive Queries.
Pratul DublishJoachim BiskupYehoshua SagivPublished in: ICDT (1990)
Keyphrases
- conjunctive queries
- np complete
- query evaluation
- query answering
- integrity constraints
- data complexity
- query language
- query rewriting
- special case
- query containment
- data exchange
- decision procedures
- datalog programs
- probabilistic databases
- computational complexity
- bounded treewidth
- boolean expressions
- regular path queries
- satisfiability problem
- database
- np hard
- databases
- conjunctive query containment
- queries using views
- deductive databases