Keyphrases
- query optimization
- database systems
- distributed query processing
- cost model
- multidatabase systems
- query processing
- query execution
- cardinality estimation
- xml data
- parallel query processing
- distributed environment
- cost estimation
- distributed systems
- query optimizers
- query optimizer
- efficient execution
- query execution plans
- database
- query scheduling
- selectivity estimation
- data placement
- execution plan
- query plan
- continuous queries
- distributed database systems
- approximate query answering
- query execution plan
- multi dimensional
- mobile agents