Pete, I am interested in this as well, specifically mapping Boolean in entities to non-boolean database fields (Oracle, ugh). I have Boolean represented in Oracle as non-null 1's and 0's. I have read that you can use Hibernate query substitutions to get around this problem, is this what you are referring to in your previous post or is there some other way? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4070604#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...