Querying Data Exchange Settings Beyond Positive Queries.
Marco CalauttiSergio GrecoCristian MolinaroIrina TrubitsynaPublished in: Datalog (2022)
Keyphrases
- data exchange
- query answering
- xml data exchange
- query language
- unions of conjunctive queries
- answering queries
- query processing
- data integration systems
- schema mappings
- data management
- data integration
- conjunctive queries
- query evaluation
- query answers
- database
- issues arise
- query containment
- databases
- open world
- data model
- regular path queries
- probabilistic databases
- query rewriting
- query interface
- data sources
- database systems
- expressive power
- database schema
- source schema
- tuple generating dependencies
- data complexity
- similarity search
- database queries
- relational queries
- np complete
- data analysis
- incomplete information
- database management systems
- complexity of query answering