Keyphrases
- efficient processing
- query processing
- range queries
- queries involving
- skyline queries
- efficient implementation
- spatial queries
- query types
- continuous queries
- query optimization
- query evaluation
- index structure
- data management
- cost model
- join operations
- join algorithms
- twig queries
- inverted index
- r tree
- query result
- pattern queries
- keyword queries
- user queries
- xml data
- multi dimensional
- knn
- database systems
- feature selection
- search engine
- information retrieval