"Soon5" wrote : Hy, | | I had some Problems with count(*) in the past. Try to use count(IDColumn) or another not null column. | | Greetings Soon5 Thank you for the idea. Got a workaround by replacing count(*) with : List l = (List) | em.createNativeQuery("SELECT uId FROM Users_Terminals ut where "+ | "tId=" + termId + " and uId=" +userId).getResultList(); | return(l!=null && l.size()>0 && ((Integer)(l.get(0))).intValue()>0); | But still interesting .. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4111903#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...