Dear Ludek
I am Using Visual Studio 2010 and CR version 13.0.6.1027 , Also Using OLEDB As provider and Microsoft OLEDB provider for oracle as Driver .
I am using Global Temporary Table in Command (Select * from GTT_TB). I am inserting Record For Table (GTT_TB) from following Procedure (GENERATE_GTT_TB) .
when I change the parameter value by clicking refresh button in preview window It showing same output Not getting Refresh in Designer .
Note : Actually the output displaying in Preview window for the parameter value which given while selected that Procedure from Database expert screen. Please check 2nd image . 
