Bug in Aggregate Persistence Wizard with multiple hierarchies

Question

Hi,
Let's say you have a dimension with 2 hierarchies. In example:
product -> subcategory -> category -> all products
product -> subtype -> type -> all products
Then you run the "Aggregate Persistence Wizard" and generate the code for 2 aggregations, one for each hierarchy.
Then you execute the generated code wiithout errors.
But no aggregate fact table is created, not inside the rpd, neither in the database.
You only found the aggregated dimension tables (both in rpd and database), which btw generate consistency check errors due to the missing fact table.
Workaround:
The code generated by the Persistence Wizard contains a single "create aggregates" statement.
Multiple aggregation are separated by commas inside the same statement.
Instead create multiple "create aggregates" commands, one for each aggregation, each separated by a semicolon.
OBIEE 11.1.1.5
Hope it helps,
Corrado

Answer 1

Cosimo,
If you've built your business model correctly with the complex joins and the dimensions relating to your fact, then the wizard will pick them up normally and will allow you to generate a script like this:
prepare aggregates
"ag_Fact_Budget"
for "Core"."Fact - Budget"("Budget Amount")
at levels ("Core"."Conformed Date"."Fiscal Year")
using connection pool "Siebel Data Warehouse"."Data Warehouse Connection Pool"
in "Siebel Data Warehouse"."Catalog";
Check that your BM is consistent and sound (stars in physical and BM layer built right).
Documentation-wise, refer to the Oracle Business Intelligence Server Administration Guide Version 10.1.3.2, page 189 f. or the Server Architect course, module 9 "Using Aggregates".