/**
  * Get a paginator for the "select" statement.
  *
  * @param  int    $perPage
  * @param  array  $columns
  * @return Illuminate\Pagination\Paginator
  */
 public function paginate($perPage = 15, $columns = array('*'))
 {
     $paginator = $this->connection->getPaginator();
     if (isset($this->groups)) {
         return $this->groupedPaginate($paginator, $perPage, $columns);
     } else {
         return $this->ungroupedPaginate($paginator, $perPage, $columns);
     }
 }