Como traduzir a consulta pré-formatada do Codeigniter em uma consulta MySQL original (por exemplo, $this->db->select('table1.*,table2.*,table3.*')))

function tampilkan_data(){
    $this->db->select('barang.*,barang_keluar.*,barang_masuk.*');
    $this->db->from('barang');
    $this->db->join('barang_keluar', 'barang.id_barang=barang_keluar.id_barang','left');
    $this->db->join('barang_masuk', 'barang.id_barang=barang_masuk.id_barang','left');
    $this->db->order_by('barang.id_barang','asc');
    $this->db->order_by('barang.kode_barang','asc');
    $this->db->where('barang.status','0');
    $query = $this->db->get()->result(); // notice that i have removed the return keyword
    echo $this->db->last_query(); // This will print your query directly on the screen.
}