Adding Flexibility to Query Evaluation for Modularly Stratified Databases.
Ulrich ZukowskiBurkhard FreitagPublished in: JICSLP (1996)
Keyphrases
- query evaluation
- databases
- data management
- efficient query evaluation
- query language
- data complexity
- query processing
- conjunctive queries
- deductive databases
- null values
- probabilistic databases
- database
- transitive closure
- disjunctive deductive databases
- xml data
- database systems
- constraint databases
- data model
- querying xml documents
- relational database systems
- data exchange
- data integration
- data warehouse
- query engine
- special case
- query answers
- knowledge discovery
- xml streams
- data sources
- relational databases