Oracle.xs

Hi,

In the following piece of code in DBD::Oracle.pm:
----
# Call Oracle OCI logon func in Oracle.xs file
# and populate internal handle data.
DBD::Oracle::db::_login($dbh, $dbname, $user, $auth, $attr)
or return undef;
----
where does the function call DBD::Oracle::db::_login lead into?

While in debugger mode, why does it not allow to step into this
function?

Any help will be highly valuable.

Thanks,
Ani

.