Keyphrases
- query processing
- database queries
- database
- range queries
- efficient processing
- query language
- user queries
- query formulation
- web search engines
- query evaluation
- query logs
- attribute values
- search queries
- selectivity estimation
- tree patterns
- complex queries
- relational database systems
- cost model
- retrieval systems
- response time
- data model
- web pages
- databases