php - sql select如何调用函数？

Question

我有 sql select，我需要对 status_bid 字段使用一些函数？像这样:

        SELECT 
             `N`.`_id` as `_id`,
             `N`.`created_at` as `created_at`,
             CASE
                WHEN `N`.`status_bid` = 1 THEN "'.$this->getBidStatusString(1).'"
                WHEN `N`.`status_bid` = 2 THEN "'.$this->getBidStatusString(2).'"
                WHEN `N`.`status_bid` = 3 THEN "'.$this->getBidStatusString(3).'"
                WHEN `N`.`status_bid` = 4 THEN "'.$this->getBidStatusString(4).'"
                WHEN `N`.`status_bid` = 5 THEN "'.$this->getBidStatusString(5).'"
                WHEN `N`.`status_bid` = 6 THEN "'.$this->getBidStatusString(6).'"
                WHEN `N`.`status_bid` = 10 THEN "'.$this->getBidStatusString(10).'"
                WHEN `N`.`status_bid` = 11 THEN "'.$this->getBidStatusString(11).'"                    
                ELSE "0"
             END as `status_bid`,                 
             ..........
             ..........

但是CASE WHEN ELSE END对我来说并不漂亮。怎么改成这样

    if (`N`.`status_bid` IS NOT NULL) {
        '".$this->getBidStatusString(`N`.`status_bid`).'" as `status_bid`  
    }

我有php函数

/**
 * @return string
 */
public function getBidStatusString($id)
{
    if (array_key_exists($id, Bit::getBidStatusSerialized())) {
        return Bit::getBidStatusSerialized()[$id];
    }
}

这在sql中可能吗？

Answer 1

不要在 SQL 中执行此操作。从 mysql 获取数据后迭代您的数据。或者，也许您可​​以在需要时调用 getBidStatusString。例如

<span><?=Bit::getBidStatusSerialized()[$data['id']]?>