158c158,160
< 			RegisterFunction("replace", new StandardSafeSQLFunction("replace", NHibernateUtil.String, 3));
---
> 			RegisterFunction("replace", new StandardSafeSQLFunction("replace", NHibernateUtil.String, 3));
> 
> 			RegisterFunction("str", new SQLFunctionTemplate(NHibernateUtil.String, "cast(?1 as nvarchar)"));