INFORMIX equivalent of DBSERVERNAME in ORACLE

Folks,

    In INFORMIX there is a default value called DBSERVERNAME that can be assigned to a column during the table definition as follows:

   create table t1 (c1 char(18) default DBSERVERNAME );

Is there an ORACLE 9i equivalent for DBSERVERNAME that can be used in the table.column definition?

PS : DBSERVERNAME in INFORMIX is the instance name

Thanks.

--
Rajiv Jhaveri
rjhaveri_at_optonline.net