Can't get your code to run without the Bugzillamodule. While I'm sure it would be fun to learn all about how that module works and go through the effort to install it here, I really don't have the time. So --

Just so you can see what is happening, I would suggest:

• Not running the code from a web page, but from your system directly, and;
• Changing the code to something like the following:

#!/usr/bin/perl

use strict;
use warnings;

use Data::Dumper;
use Bugzilla;


{
    my $retval = Bugzilla->dbh->selectall_arrayref
    (
        'SELECT servicenow, Task_Type, Short_Description, Customer, Pr
+iority, Assignment_Group,Assignment_ID FROM service_now where bug_id=
+237177'
    );

    print Dumper $retval;
}

exit;

__END__

C:\Steve\Dev\PerlMonks\P-2013-11-05@1128-DBI>testdb.pl
Can't locate Bugzilla.pm in @INC
  (@INC contains:
    C:\Steve\Perl
    C:/Perl/Perl-5.16.3.1603/site/lib
    C:/Perl/Perl-5.16.3.1603/lib
    .
  ) at C:\Steve\Dev\PerlMonks\P-2013-11-05@1128-DBI\testdb.pl line 7.
BEGIN failed--compilation aborted at
  C:\Steve\Dev\PerlMonks\P-2013-11-05@1128-DBI\testdb.pl line 7.
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