Question : SSRS - Relationship setup in Report model

I dragged two columns from two table in report builder. I checked the log, the generated SQL  is always left outer join. I searched the internet.  It said the generated sql should be always inner join. Is there a setting for this? Is that true I can not setup the relationship in report model  to make it generate the join that I want?
http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/thread/2ab8d67d-e07d-4f21-9e60-8f3898878cf8

Answer : SSRS - Relationship setup in Report model

I found the solution. There is a cardinality in role to control this.