Efficiently Updating Cost Repository Values for Query Optimization on Web Data Sources in a Mediator/Wrapper Environment.
Justo HidalgoAlberto PanManuel ÁlvarezJaime GuerreroPublished in: NGITS (2006)
Keyphrases
- query optimization
- cost estimation
- web data sources
- database systems
- cost model
- query plan
- semi structured
- query processing
- execution plan
- multidatabase systems
- data placement
- xml data
- cardinality estimation
- query optimizer
- feature selection
- selectivity estimation
- query execution
- query scheduling
- join operators
- query execution plans
- join queries
- website
- recursive queries
- query optimizers
- metadata
- multi dimensional
- information extraction
- data sources
- machine learning