Row level security in OBIEE 11g

Question

Hi guys,
We have a business intelligence project in OBIEE, and I have a question regarding row level security (RLS).
Specifically, I have an hierarchical organization with users belonging to different structures. If one user belongs
to a structure that is above another structure in hierarchy, then he should see both data from his structure and
the of the users in structures bellow it. In the reports, we must have filters implemented respecting this requirement,
i.e. if one logs in OBI and accesses the report, he should see in the filter "Users" only subordinate users and respectively
data displayed in the report should be filtered accordingly. How would you suggest to implements this type of security
in the data model? And how could I create the type of filter mentioned above?  

Answer 1

This needs to be implemented in 3 different levels. 1. in database  2. in RPD  3 in reports
1. You need to have facts or dimensions which have columns through which you can filter based on their hierarchy. e.g position in an organisation or department in the hierarchy table which can be joined to fact.
2. In rpd you need to create a session variable and initialize it using init block based on the user who is logging in. This variable will be you position or department through which you want to filter based on hierarchy. e.g select position from hierarchy_table where user= 'NQSession(user)' . The resulting position value will be used as a filter.
3. Add this position variable as a content filter in your LTS in you BMM layer.
4. You can also use this session variable  as a filter in you reports too.
hope this helps.
Senthil