Overview of Dynamic Query Evaluation in Intensional Query Optimization

摘要

In (1), We introduced a new query optimization framework called intensional query optimization (IQO). This framework enables existing optimization techniques to be applied to queries over views that employ unions. Advanced database technologies and applications such as federation and mediation over heterogeneous database sources, object oriented databases and query languages, and data warehousing for decision support readily lead to such complex view definitions, and thus tend to incur complex, expensive queries.