Conjunctive Queries on Probabilistic Graphs: The Limits of Approximability.
Antoine AmarilliTimothy van BremenKuldeep S. MeelPublished in: CoRR (2023)
Keyphrases
- conjunctive queries
- probabilistic databases
- boolean expressions
- query answering
- bounded treewidth
- query evaluation
- integrity constraints
- data complexity
- np complete
- query language
- special case
- data exchange
- query rewriting
- query containment
- uncertain data
- datalog programs
- decision procedures
- probabilistic model
- probabilistic reasoning
- directed graph
- relational queries
- approximation algorithms
- databases
- normal form
- answering queries
- expressive power
- dl lite
- data management
- containment of conjunctive queries