I am using jboss app server 4.0.5 with the version of EJB3 that it ships with(I am currently unable to upgrade due to project scheduling issues). When I use SingleTableInheritance and a DiscriminatorFormula with string DiscriminatorValue's that are not the same length and have more that one when clause in my DiscriminatorFormula then hibernate appears to pad the the shorter DiscriminatorValues with spaces until they are the length of the longest DiscriminatorValue. They then get WrongClassExceptions when hibernate tries to resolve them to objects of the base class. If I change the DiscriminatorValues to be all the same length then it works fine. Here is an example of what does not work: | @DiscriminatorFormula("case when DEFININGORG in ('VAC', 'AMTS') then 'PROVIDER' when DEFININGORG='ST' then 'ST' else 'VENDOR' end") | class Category | {...} | | @DiscriminatorValue("PROVIDER") | class ProviderCategory extends Category | {...} | | | @DiscriminatorValue("VENDOR") | class VendorCategory extends Category | {...} | | | @DiscriminatorValue("ST") | class STCategory extends Category | {...} | It can only load ProviderCategory as a Category but get a WrongClassException when loading any of the other ones. When I view the generated SQL in the logs, I notice that ST and VENDOR are padded with spaces until they are the length of PROVIDER However this works for all of them: | @DiscriminatorFormula("case when DEFININGORG='ST' then 'S' when DEFININGORG in ('VAC', 'AMTS') then 'P' else 'V' end") | class Category | {...} | | @DiscriminatorValue("P") | class ProviderCategory extends Category | {...} | | | @DiscriminatorValue("V") | class VendorCategory extends Category | {...} | | | @DiscriminatorValue("S") | class STCategory extends Category | {...} | Has this been fixed?? I tried to search in the JIRA for DiscriminatorFormula but for some reason my search did not come up with any results View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4177515#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...