Keyphrases
- query optimization
- database systems
- cost model
- query processing
- database management systems
- object oriented database systems
- multidatabase systems
- query execution
- cost estimation
- cardinality estimation
- query execution plans
- query optimizer
- xml data
- semantic query optimization
- data placement
- query scheduling
- recursive queries
- efficient execution
- response time
- object oriented
- selectivity estimation
- execution plan
- management system
- data warehousing
- multi dimensional
- query optimizers
- continuous queries
- relational databases
- approximate query answering
- data streams