Keyphrases
- recommender systems
- query processing
- database systems
- data management
- r tree
- query optimization
- efficient query processing
- index structure
- query evaluation
- similarity search
- aggregate queries
- query execution
- processing queries
- cost model
- range queries
- efficient processing
- user queries
- xml data
- materialized views
- spatial queries
- databases
- user profiles
- join queries
- similarity measure
- query processor
- distributed query processing