Keyphrases
- query processing
- query evaluation
- user queries
- range queries
- database queries
- complex queries
- efficient processing
- query answers
- queries involving
- original query
- response time
- query types
- query formulation
- answering queries
- multiple queries
- database
- search queries
- boolean queries
- semantic query
- data sources
- processing queries
- query complexity
- probabilistic databases
- web queries
- query result
- aggregate queries
- selectivity estimation
- pre computed
- query language
- indexing techniques
- query suggestion
- query specific
- visual query language
- query rewriting
- spatial queries
- range sum queries
- keyword queries
- inverted index
- retrieval systems
- query answering
- relational queries
- web search engines
- query terms
- transformation rules
- search engine
- result set
- cost model
- query logs
- recursive queries
- correct answers
- query engine
- query refinement
- xpath queries
- user specifies
- approximate answers
- query optimization
- data structure
- exact answers
- query patterns
- data objects
- tree patterns
- conjunctive queries
- web search
- aggregate views
- information retrieval
- query containment
- relevance model
- query plan
- skyline queries
- language model
- information retrieval systems
- query expansion
- index structure
- exact match
- relevance feedback
- keywords
- retrieval process
- query execution