|Oracle9i OLAP User's Guide
Release 2 (220.127.116.11)
Part Number A95295-02
The script generated by
OLAP_PC_TRANSFORM.CREATE_SCRIPT creates a table that stores the values from the parent-child table in levels.
The resulting level-based dimension table includes the full lineage of every level value in every row. This type of dimension table is solved, because the fact table related to this dimension includes embedded totals for all level combinations.
If you want to enable parent-child dimension tables for access by the OLAP API, you must convert them to solved, level-based dimension tables. The OLAP API requires that dimensions have levels and that they include a GID (Grouping ID) column and an Embedded Total (ET) key column. GIDs and ET key columns are described in Example: Creating a Solved, Level-Based Dimension Table.
Figure 25-2, "Sample Solved, Level-Based Dimension Table Columns" illustrates how the parent-child relationships in Figure 25-1 would be represented as solved levels.
TOT_GEOG COUNTRY REGION STATE CITY DESCRIPTION -------- ------- --------- ----- ------- ---------------------- World USA Northeast MA Boston Boston, MA World USA Northeast MA Burlington Burlington, MA World USA Northeast NY New York City New York, NY World USA Southeast GA Atlanta Atlanta, GA World USA Northeast MA Massachusetts World USA Northeast NY New York State World USA Southeast GA Georgia World USA Northeast North East Region World USA Southeast South East Region World USA United States of America World Canada Canada World World
When creating OLAP Catalog metadata to represent a solved, level-based dimension hierarchy, specify a
SOLVED,LEVEL_BASED, as described in Chapter 20, "CWM2_OLAP_HIERARCHY".