We have some issues about sqlldr. Our roles are set default to none and when we login to sqlplus or any application, we set role in order to run the appliations. And there is a problem running sqlldr since I can't set role after i'm in the sqlldr utility. So my question is

1) Can I SET ROLES in sqlldr in Sun Solaris?

2) Can I run sqlldr from sqlplus from Sun Solaris?

for ex: from unix, I type sqlplus
I'm in the sqlplus> can I run sqlldr here?