Invokes a stored procedure.

    When you define a module with the CREATE MODULE statement, SQL
    stores the module as an object in an Oracle Rdb database. It also
    stores each of the module's procedures and functions. The module
    procedures that reside in an Oracle Rdb database are called
    stored procedures. In contrast, nonstored procedures refer to
    module procedures that reside outside the database in SQL module
    files. See the CREATE MODULE for more information on creating
    stored procedures.

    For optional information on invoking stored procedures, see the
    CALL Compound_Statement.