Hi 1nickt,

Until one of the of the other monks finds us a more elegant solution – try Arbitrary SQL through a custom ResultSource. See e.g. below

My::Schema

package My::Schema;

use base qw ( DBIx::Class::Schema );

# load My::Schema::Result[Set]::* classes
__PACKAGE__->load_namespaces();

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My::Schema::Result::CD

package My::Schema::Result::CD;

use strict;
use warnings;

use base qw ( DBIx::Class::Core );

__PACKAGE__->table_class( 'DBIx::Class::ResultSource::View' );

# specify components
__PACKAGE__->load_components( qw/ Ordered / );
__PACKAGE__->position_column( 'title' );

# specify table for Result class
__PACKAGE__->table( 'cd_view' );

# add columns to 'this' class
__PACKAGE__->add_columns( qw/ RN cdid artistid title year / );

# specify primary key(s)
__PACKAGE__->set_primary_key( qw/ cdid artistid/ );

#
# specify relationships etc..
#

# do not attempt to deploy() this view
__PACKAGE__->result_source_instance->is_virtual(1);
__PACKAGE__->result_source_instance
    ->view_definition(q[ 
      SELECT ROW_NUMBER() 
        OVER (PARTITION BY artistid ORDER BY cdid) AS RN
      ,cdid
      ,artistid
      ,title
      ,year
      FROM cd
      ]);

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My::Schema::ResultSet::CD

package My::Schema::ResultSet::CD;

use strict;
use warnings;

use base qw ( DBIx::Class::ResultSet );

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Demo
Notice the { 'RN' => { '<=', 2 } } parameter in the search call below? You would change this to 5…

#!perl -sl
use lib qw ( c:\code\perl );

use strict;
use warnings;

use My::Schema;
use constant {
    DBI_DSN   => 'dbi:ODBC:driver={SQL Server};Server=(local);database
+=example;Trusted Connection=yes',
    DBI_USER  => undef,
    DBI_PASS  => undef,
};

my $eg_schema = My::Schema->connect(DBI_DSN,DBI_USER,DBI_PASS,
    { RaiseError=>1, AutoCommit=> 1 });
my $cd_rs = $eg_schema->resultset('CD')
    ->search({ 'RN' => { '<=', 2 } });

print $_->RN.",".$_->cdid.",".$_->title while $_ = $cd_rs->next;

__END__
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It'll get the job done but I wasn't able to get too creative and start using CTEs and such; your mileage may vary...

Cheers,
Shadowsong