Steve Ebersole commented on an issue
Hibernate ORM / Task HHH-8445
Implement REF_CURSOR support for StoredProcedureQuery
{code}
Session session = em.unwrap(Session.class);
org.hibernate.procedure.ProcedureCall call =
    session.createStoredProcedureCall("FIND_ITEMS");

call.registerParameter(1, Object.class, ParameterMode.REF_CURSOR);

org.hibernate.result.ResultSetOutput resultSetOutput =
    (org.hibernate.result.ResultSetOutput) call.getResult().getCurrent();
...