Just installed DBD::Oracle and the following works for me: 
#!/usr/bin/perl

use strict;
use warnings;
use DBI;
use DBD::Oracle qw(:ora_session_modes);

my $dbhost = "my.server.name";
my $dbuser = "sys"; # not "system" or "/"
my $dbpass = "password";

my $sid = "SIDNAME";

my $dbh = DBI->connect(
  "dbi:Oracle:host=$dbhost;sid=$sid", 
  $dbuser, 
  $dbpass, 
  { ora_session_mode => ORA_SYSDBA }
);

if ($dbh) {
  print "Connected\n";
} else {
  die $DBI::errstr;
}

$dbh->disconnect;

[download]
Server is Oracle9i Enterprise Edition Release 9.2.0.6.0

Update: No TNS file, no ORACLE_SID environment variable.

-- Time flies when you don't know what you're doing

In reply to Re: Connecting 'as sysdba' using DBD::Oracle by FloydATC
in thread Connecting 'as sysdba' using DBD::Oracle by laminee

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