Keyphrases
- range queries
- query language
- efficient processing
- spatial join
- user queries
- database queries
- user defined
- data sources
- query processing
- response time
- r tree
- multi dimensional
- answering queries
- multiple disks
- data replication
- query evaluation
- query formulation
- grid file
- search queries
- query logs
- fault tolerant
- database
- web search engines
- index structure
- relational databases