Containment and Minimization of Positive Conjunctive Queries in OODB's.
Edward P. F. ChanPublished in: PODS (1992)
Keyphrases
- conjunctive queries
- query language
- query evaluation
- query containment
- query answering
- data complexity
- integrity constraints
- decision procedures
- data model
- np complete
- special case
- expressive power
- object oriented databases
- query rewriting
- regular path queries
- probabilistic databases
- data exchange
- containment of conjunctive queries
- database
- conjunctive query containment
- object oriented
- unions of conjunctive queries
- objective function
- conjunctive regular path queries
- relational queries
- primary key
- relational algebra
- data sets
- answering queries
- datalog queries
- datalog programs
- regular expressions
- tight complexity bounds
- data management