Try 
$dsn = "dbi:Oracle:ABCD12";

[download]
and make sure that sqlnet.ora has 
NAMES.DEFAULT_DOMAIN = COMPANYDOMAIN.COM

[download]

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

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