Specific Function Name Clause
This clause is mandatory if you are using function name overloading, but otherwise is optional.
The clause specifies the specific name of the function. The specific function name is the name placed in the DBC.TVM table and has the same name space as tables, views, macros, triggers, join indexes, hash indexes, and stored procedures. A specific function name must be unique within its containing database. See the table in “External Body Reference Clause” on page 274 for more information about function name usage.