Query Optimization in a Mediator for Digital Libraries.

Faouzia Wadjinny Dalila Chiadmi

Published in: NTMS (2008)

Keyphrases

query optimization
digital libraries
database systems
cost model
metadata
cost estimation
query execution
query processing

multidatabase systems
cardinality estimation
semantic query optimization
xml data
efficient execution
data sources
query plan
query optimizers

query scheduling
selectivity estimation
semi structured
join queries
data placement
query optimizer
recursive queries
peer to peer

approximate query answering
heterogeneous data sources
databases
continuous queries
management system
end users
query execution plan