CREATE OR REPLACE TYPE myObj
AS OBJECT (
   Col1  number,
   Col2  varchar(2),
   Col3  timestamp,
   ...
   Col57 number
);

##</code><code>##

my $sql = "
DECLARE
  in_row  myObj;
  retcode number;
BEGIN
  :retcode := Otherpackage.Function(:in_row);
END;
";

my $sth = $dbh->prepare($sql) ...