Keyphrases
- query processing
- database
- algebraic operations
- response time
- data structure
- query expansion
- query evaluation
- database queries
- relevance feedback
- access path
- user queries
- primitive operations
- retrieval method
- resource allocation
- data sources
- keywords
- query execution plans
- user interaction
- complex queries
- query formulation
- efficient processing
- aggregate queries
- keyword search
- original query
- indexing techniques
- search queries
- range queries
- similarity measure