The homomorphism property in query containment and data integration.
Foto N. AfratiPublished in: IDEAS (2019)
Keyphrases
- data integration
- query containment
- query answering
- data exchange
- unions of conjunctive queries
- query rewriting
- conjunctive queries
- databases
- data model
- data sources
- data management
- data complexity
- regular path queries
- answering queries
- schema mappings
- data warehouse
- database schema
- heterogeneous data
- data extraction
- transitive closure
- datalog programs
- business intelligence
- object oriented
- relational databases
- regular expressions
- expressive power
- np hard
- decision procedures
- machine learning
- knowledge discovery