90% of the stored procedures I have to use are simply old legacy mainframe programs that have SQL wrappers around them, with a load of INOUT parameters and no result sets.

From reading the docs hibernate only supports stored procedures that return result sets.

Are there any plans to broaden the support to cope with the above types of procedures ?

There is an open JIRA issue for 3.1. It's not very difficult, maybe you want to contribute a patch?

Point me in the direction and I will have a look...

Does the last version of Hibernate (3.1) actually support this feature?

Thanks