Pop\Db\Sql\AbstractSql::__construct PHP Метод

    public function __construct(\Pop\Db\Sql $sql, $columns = null)
    {
        $this->sql = $sql;
        if (null !== $columns) {
            if (!is_array($columns)) {
                $columns = array($columns);
            }
            $this->columns = $columns;
        }
    }