Package org.pentaho.aggdes

Provides an Aggregate Designer utility to design an optimal set of pre-computed summary tables for a star schema.

See: Description

Class Summary

Class	Description
Main	Command line utility to run the aggregate designer algorithm.

Exception Summary

Exception	Description
AggDesignerException	The main agg designer exception class

Package org.pentaho.aggdes Description

Provides an Aggregate Designer utility to design an optimal set of pre-computed summary tables for a star schema.

The summary tables, known as aggregates, allow applications such as the Mondrian OLAP engine to access the star schema efficiently.

Also, some databases allow you to declare summary tables as first-class objects in DDL; the system will maintain the aggregate tables, and the query optimizer will automatically use them to satisfy a query whenever possible. Teradata Aggregate Join Indexes (AJIs), Oracle Materialized Views, and IBM DB2 Materialized Query Tables are examples of this.