src/Service/DB/Table.php
public function getColumns()
    {
        if ($this->columns === null) {
            $this->columns = $this->listColumns();
        }

        return $this->columns;
    }
public function getColumns()
    {
        if ($this->columns === null) {
            $this->columns = $this->listColumns();
        }

        return $this->columns;
    }
获得所有的字段信息.

@return array