You might want to check out DBD::Oracle. Found the following example lines of code from its documentation where the port number is specified:

$dbh = DBI->connect('dbi:Oracle:host=foobar;sid=ORCL port=1521', 'scot
+t/tiger', '')

$dbh = DBI->connect('dbi:Oracle:', q{scott/tiger@(DESCRIPTION=(ADDRESS
+=(PROTOCOL=TCP)(HOST= foobar)(PORT=1521))(CONNECT_DATA=(SID=ORCL)))},
+ "")

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In reply to Re: DBI Connection with RAC by dasgar
in thread DBI Connection with RAC by asafp

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