I would like to work with a primary key consisting of 2 components, String and int. The best solution for me would be to handle it with 1 Key class, that is mapped to 2 columns, so that I could view it in a table editor like datastudio e.g. But Jboss seems to map it on 1 column with no displayable type (abyte). Is there a chance to map it on 2 columns of type String and int. I tried to use a DVC already with no success.