Keyphrases
- query optimization
- database systems
- cost model
- query processing
- multidatabase systems
- cost estimation
- case study
- cardinality estimation
- xml data
- query scheduling
- efficient query processing
- query optimizer
- query optimizers
- data placement
- query execution
- approximate query answering
- query execution plans
- selectivity estimation
- efficient execution
- semantic query optimization
- join queries
- database
- query plan
- project management
- relational databases