Extending Downward Collapse from 1-versus-2 Queries to j-versus-j+1 Queries.
Edith HemaspaandraLane A. HemaspaandraHarald HempelPublished in: STACS (1999)
Keyphrases
- query language
- database
- efficient processing
- query processing
- query evaluation
- response time
- range queries
- query formulation
- database queries
- retrieval systems
- probabilistic databases
- web search engines
- data sources
- information retrieval
- query logs
- co occurrence
- learning algorithm
- aggregate queries
- selectivity estimation