Try to play with Count() aggregate function. For example "from ObjectA o where COUNT(o.list) >=:param" View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4231081#4231081 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4231081