Perhaps a simpler example will help.

You can set __PACKAGE__->result_source_instance->name to any, arbitrary SQL your DB backend understands. You need to pass it as a scalar reference and the enclosing parens are important.

Running the following code with DBIC_TRACE=1 to display the generated SQL shows: 

SELECT me.number FROM (select 10*10 as number) me: 
100

#!/usr/bin/perl
use strict;
use warnings;

package MySchema::ArbitrarySQL;
use base qw/DBIx::Class::Core/;

__PACKAGE__->table('dummy');
__PACKAGE__->add_columns(qw/number/);
__PACKAGE__->result_source_instance->name(\'(select 10*10 as number)');


package MySchema;
use base qw/DBIx::Class::Schema/;

__PACKAGE__->register_class(ArbitrarySQL => 'MySchema::ArbitrarySQL');


package main;

my $schema = MySchema->connect(
    'dbi:SQLite:dbname=myschema.db', undef, undef,
);

my ($r) = $schema->resultset('ArbitrarySQL')->all;

print $r->number, "\n";

In reply to Re: [DBIX::Class] problem with Arbitrary SQL through a custom ResultSource by semifor
in thread [DBIX::Class] problem with Arbitrary SQL through a custom ResultSource by dreel

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