Computing Minimal Projection Modules for Conjunctive Queries.
Jieying ChenMichel LudwigYue MaDirk WaltherPublished in: Description Logics (2018)
Keyphrases
- conjunctive queries
- query answering
- query evaluation
- data complexity
- integrity constraints
- np complete
- query language
- data exchange
- query containment
- probabilistic databases
- query rewriting
- boolean expressions
- special case
- decision procedures
- containment of conjunctive queries
- datalog programs
- bounded treewidth
- building blocks
- dl lite
- queries using views
- data sets
- unions of conjunctive queries
- answering queries using views
- relational queries
- deductive databases
- query processing
- relational databases