Trying to get a "simple" script to work

My script is intended to update 3 columns in a particular row of a table.
My script is:
#!/usr/local/perl5/bin/perl -w

use strict;
use DBI;

my $alt_emp_no = 60017; # list of employee ids
my $first_name  ="Neil";
my $middle_name = "W";
my $last_name   ="Han";

my $conn_data="/home/larry/connection_data";
open (CONNECTION_DATA, $conn_data)
        or die "Failed to open connection data file\n";
my $orasid = <CONNECTION_DATA>;
my $user_name = <CONNECTION_DATA>;
my $password = <CONNECTION_DATA>;

close (CONNECTION_DATA);

chomp ($orasid);
chomp ($user_name);
chomp ($password);

my $oraProdDBH = DBI->connect("dbi:Oracle:", $user_name, $password)
    or die "Failed to connect to $DBI::errstr\n";

$oraProdDBH->{RaiseError} = 1;
$oraProdDBH->{AutoCommit} = 0;

# Update a name of a user not in Ceridian.

    print "UPDATE CSI_HR SET FIRST_NAME=$oraProdDBH->quote($first_name)  ,
MIDDL
E_NAME=$oraProdDBH->quote($middle_name) ,
LAST_NAME=$oraProdDBH->quote($last_nam
e) , REC_MOD_DATE=SYSDATE  WHERE ALT_EMP_NO = $alt_emp_no \n";

    $oraProdDBH->do
    (
    "UPDATE CSI_HR SET FIRST_NAME=$oraProdDBH->quote($first_name)  ,
MIDDLE_NAME
=$oraProdDBH->quote($middle_name) ,
LAST_NAME=$oraProdDBH->quote($last_name) , R
EC_MOD_DATE=SYSDATE  WHERE ALT_EMP_NO = $alt_emp_no"
    ) or die "Failed to update csi_hr; $DBI::errstr\n";

$oraProdDBH->commit();
$oraProdDBH->disconnect;


When I run this script, I get the error:

UPDATE CSI_HR SET FIRST_NAME=DBI::db=HASH(0x221d94)->quote(Neil)  ,
MIDDLE_NAME=DBI::db=HASH(0x221d94)->quote(W) ,
LAST_NAME=DBI::db=HASH(0x221d94)->quote(Han) , REC_MOD_DATE=SYSDATE  WHERE
ALT_EMP_NO = 60017
DBD::Oracle::db do failed: ORA-00933: SQL command not properly ended (DBD
ERROR: error possibly near <*> indicator at char 32 in 'UPDATE CSI_HR SET
FIRST_NAME=DBI<*>::db=HASH(0x221d94)->quote(Neil)  ,
MIDDLE_NAME=DBI::db=HASH(0x221d94)->quote(W) ,
LAST_NAME=DBI::db=HASH(0x221d94)->quote(Han) , REC_MOD_DATE=SYSDATE  WHERE
ALT_EMP_NO = 60017') [for Statement "UPDATE CSI_HR SET
FIRST_NAME=DBI::db=HASH(0x221d94)->quote(Neil)  ,
MIDDLE_NAME=DBI::db=HASH(0x221d94)->quote(W) ,
LAST_NAME=DBI::db=HASH(0x221d94)->quote(Han) , REC_MOD_DATE=SYSDATE  WHERE
ALT_EMP_NO = 60017"] at ./update_hrname.pl line 55.

I have tried with and without a newline, with and without a semicolon.

I have other code which is nearly identical to this (other columns being
updated, but basically the same code.

I am assuming that I have made some hair brained mistake - for that I
apologize.
I just haven't been able to understand what I need to do to fix this.

I am hoping some kind person might explain the fix in a way that I can
understand.