A full or relative repository path name that specifies the
    source of the database definitions. When you use the PATHNAME
    argument, any changes you make to database definitions are
    entered in both the repository and the database system file.
    Oracle Rdb recommends using the PATHNAME argument if you have the
    repository on your system and you plan to use any data definition
    statements.

    If you specify PATHNAME:

    o  During compilation, your application attaches to the
       repository database definition and reads metadata from the
       dictionary definitions. SQL extracts the file name of the
       Oracle Rdb database from the dictionary and saves it for use
       at run time.

    o  At run time, your application attaches to the Oracle
       Rdb database file name extracted from the dictionary at
       compilation.