Optimizing Disjunctive Queries with Expensive Predicates.
Alfons KemperGuido MoerkotteKlaus PeithnerMichael SteinbrunnPublished in: SIGMOD Conference (1994)
Keyphrases
- query processing
- user defined
- query language
- efficient processing
- query evaluation
- user queries
- complex queries
- database queries
- web search engines
- response time
- boolean queries
- join queries
- boolean operators
- information retrieval
- answering queries
- datalog programs
- aggregate queries
- spatial objects
- computationally expensive
- data sources
- database
- result set
- query logs
- data structure