Semantic Optimization of Conjunctive Queries.
Pablo BarcelóDiego FigueiraGeorg GottlobAndreas PierisPublished in: J. ACM (2020)
Keyphrases
- conjunctive queries
- query answering
- query evaluation
- integrity constraints
- np complete
- data complexity
- query language
- data exchange
- query rewriting
- query containment
- special case
- schema mappings
- boolean expressions
- natural language
- decision procedures
- probabilistic databases
- answering queries using views
- datalog programs
- bounded treewidth
- regular path queries
- databases
- deductive databases
- incomplete information
- semantic web
- relational queries
- xml documents
- unions of conjunctive queries
- acyclic conjunctive queries