Keyphrases
- database
- query processing
- database queries
- databases
- relational databases
- relational database systems
- distributed query processing
- access path
- heterogeneous databases
- sql queries
- database management systems
- database systems
- r tree
- cost model
- data management
- response time
- query result
- probabilistic model
- spatial queries
- efficient query processing
- ibm db
- relational dbms
- clustering algorithm