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DB2 Cube Views: A Primer
book

DB2 Cube Views: A Primer

by Corinne Baragoin, Geetha Balasubramaniam, Bhuvaneshwari Chandrasekharan, Landon DelSordo, Jan B. Lillelund, Julie Maw, Annie Neroda, Paulo Pereira, Jo A. Ramos
September 2003
Beginner to intermediate content levelBeginner to intermediate
754 pages
18h 9m
English
IBM Redbooks
Content preview from DB2 Cube Views: A Primer
Chapter 4. Using the cube model for summary tables optimization 141
In this section, however, we will expand on the optimization rules and, as an
example, apply these rules on a basic star schema. Note that optimization rules
further extend the base rules and cube model completeness rules and ensure
that the SQL queries created for the metadata can be optimized successfully.
These are the optimization rules for DB2 Cube Views:
򐂰 Join optimization rules:
A referential integrity constraint must be defined for the columns that
participate in a join. For example, columns involved in facts-to-dimension
joins and if applicable dimension-to-dimensio ...
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Publisher Resources

ISBN: 0738499730Purchase book