A method, apparatus, and article of manufacture for optimizing a query by deriving uniqueness for indices on the summary tables. The query is analyzed to determine whether a summary table can be used to answer the query or a summary table is directly referenced in the query. A determination is made whether...http://www.google.fr/patents/US6513034?utm_source=gb-gplus-shareBrevet US6513034 - Deriving uniqueness for indices on summary tables
