Magento Observer，功能錯誤

Question

我已經建立了這個功能，它將記錄插入數據庫中，以后我會用到。 但是，該功能的一半工作正常，另一半導致錯誤（錯誤不會顯示在日志中）

<?php
class Envato_CustomConfig_Model_Observer
{   
    public function adminSystemConfigChangedSection()
    {           

    /**
    *Insert new job Request
    *
    **/
        $tablename_c = Mage::getStoreConfig('customconfig_options/section_one/custom_field_one');
        $email = Mage::getStoreConfig('customconfig_options/section_two/custom_field_two');
        $days = Mage::getStoreConfig('customconfig_options/section_two/custom_field_three');

        $bind = array(
            'id'    => ' ',
            'tablename_c'   => $tablename_c,
            'email' => $email,
            'days'    => $days,
            'timeStamp' => now(),
        );

        //Open Database Conenction
        $write = Mage::getSingleton("core/resource")->getConnection("core_write");

        $query = "
        insert into Envato_CustomConfig_Job (Job_Id, tablename_colummname, email_template, days, timeStamp) 
        values (:id, :tablename_c, :email, :days, :timeStamp);
        ";

        $write->query($query, $bind);

    /**
    *Get Job Queue Ready
    *
    **/

        $res = "
        SELECT Job_Id, tablename_colummname, email_template, days  FROM Envato_CustomConfig_Job 
        WHERE tablename_colummname = :tablename_c 
        AND email_template = :email 
        AND days = :days 
        AND timeStamp =:timeStamp
        AND Job_Id != :id
        LIMIT 1;
        ";

        $result = $write->query($res, $bind);

        foreach($result as $record) {

            $Job_Id = $record['Job_Id'];
            $tablename_colummname = $record['tablename_colummname'];
            $days = $record['days'];
            $email_template = $record['email_template'];

            $email_Details[] = explode(".",$tablename_colummname);          

            if(!isset($email_Details['0']['2']))
            {
                $email_Details['0']['2'] = time();
            }
        }

        $bind = array(
            'Job_Id'    => $Job_Id,
            'tableName'   => $email_Details['0']['0'],
            'email' => $email_Details['0']['1'],
            'email_template' => $email_template,
            'days' => $days,
            'timeStamp' => $email_Details['0']['2'],
        );

        $query = "
        insert into Envato_CustomConfig_Job_Running (Job_Id, tableName, email, email_template, days, timeStamp) 
        values (:Job_Id, :tableName, :email, :email_template, :days, :timeStamp);
        ";

        $write->query($query, $bind);

當腳本中包含以下功能時，以下代碼將停止工作，這部分內容在Magento中不起作用。 在建議將其分解為較小的功能之前，我已經嘗試過，但是當我運行甚至將另一個功能放在類中時，該站點將無法正常工作。

switch ($bind['timeStamp']) {
        case is_numeric($bind['timeStamp']):
            //¨calculate email send date

            $email_Send_Date =  strtotime('+'.$bind['days'].' day', $bind['timeStamp']);
            $email_Send_Date = date('M d, Y', $email_Send_Date);

            $bind['timeStamp'] = date('M d, Y', $bind['timeStamp']);

            //Select Emails
            $selectBind = array(
            'email' => $email_Details['0']['1'],
            'tableName'   => $email_Details['0']['0'],
            );

            $res = "
            SELECT :email  FROM :tableName;
            ";

            $result = $write->query($res, $selectBind);

            foreach($result['email'] as $record) {      

            $binding = array(
                'Job_Id'    => $bind['Job_Id'],
                'email' => $record,
                'tableName'   => $bind['tableName'],
                'email_template' => $bind['email_template'],
                'timeStamp' => $bind['timeStamp'],
                'email_Send_Date' => $email_Send_Date,
            );


            $res = "

            insert into Envato_CustomConfig_Job_Queue
            values (:Job_Id, :email , :tableName, :email_template, :timeStamp, :email_Send_Date);

            ";

            $result = $write->query($res, $binding);
            }


            break;
        default:
            //timestamp is given.
            //Select Emails
            $selectBind = array(
            'email' => $email_Details['0']['1'],
            'timeStamp' => $email_Details['0']['2'],
            'tableName'   => $email_Details['0']['0'],
            );

            $res = "
            SELECT :email, :timeStamp  FROM :tableName;
            ";

            $result = $write->query($res, $selectBind);         

            $i = 0; 
            foreach ($result['timeStamp'] as $value) {  

                switch($value)
                {                                   
                case is_numeric($value):
                    // time()
                    $value = strtotime('+'.$bind['days'].' day', $value);
                    $value = date('M d, Y', $value);
                    break;
                default: 
                    // days + Unix
                    $value =  strtotime(str_replace(',', '', $value));
                    $value = strtotime('+'.$bind['days'].' day',$value);
                    $value = date('M d, Y', $value);
                    break;
                }

                $binding = array(
                'Job_Id'    => $bind['Job_Id'],
                'email' =>  $result['email'][$i],
                'tableName'   => $bind['tableName'],
                'email_template' => $bind['email_template'],
                'timeStamp' => $bind['timeStamp'],
                'email_Send_Date' => $value,
                );

                $res = "

                insert into Envato_CustomConfig_Job_Queue
                values (:Job_Id, :email , :tableName, :email_template, :timeStamp, :email_Send_Date);

                ";

                $result = $write->query($res, $binding);

                $i = $i+1;
            }

        break;
        }

    }

}
?>

編輯：：

我已經將其分解並調試了代碼。 我收到此錯誤，我嘗試重寫腳本，但最終結果仍然相同。 關於以下錯誤的任何想法？

保存此配置時發生錯誤：SQLSTATE [42000]：語法錯誤或訪問沖突：1064您的SQL語法有錯誤；請參見表11。 檢查與您的MySQL服務器版本相對應的手冊，以在第1行的“ nfr_familypack”附近使用正確的語法，查詢為：SELECT：email FROM：tableName;

Answer 1

我只是嘗試打印一個完整的查詢，它看起來像這樣

SELECT email FROM 'nfr_familypack';

請注意tableName周圍的單引號。 PDOStatement用單引號引起來的綁定參數。 所以會導致Mysql語法錯誤

Answer 2

您不能像在此處嘗試那樣對數據庫對象使用命名參數：

SELECT :email  FROM :tableName

考慮一下准備好的語句的作用和作用（允許MySQL引擎在不知道要傳遞給它的特定參數的情況下預先計划查詢），很明顯，您無法參數化MySQL准備查詢所需的關鍵數據。 。 例如，MySQL如何知道它針對哪個表創建查詢執行計划？