APEX

Hi All,

select sys_context('USERENV','OS_USER') from dual;

Above query return nothing when I'm execute on apex. I want to assign current OS user name to one variable, Is there any other way to find out current OS user name ?

DB version:

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production

Apex:

Thanks

Xandot