Home Backend Development PHP Tutorial ThinkPHP2.0读取MSSQL提示Incorrect syntax near the keyword 'AS'的解决方法_php实例

ThinkPHP2.0读取MSSQL提示Incorrect syntax near the keyword 'AS'的解决方法_php实例

Jun 07, 2016 pm 05:18 PM
Solution

问题代码如下:

<&#63;php 
class IndexAction extends Action{ 
  public function index(){ 
    /* 
    $Model = new Model(); 
    $test = $Model->query('select top 10 * from f_city'); 
    dump($test); 
    */ 
    $CityModel = M('city'); 
    $CityModel->find(); 
    dump($CityModel); 
  } 
} 
&#63;>

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出现的情况是使用 query 可以正确读取到数据,而使用M方法,则无法读取,会报出 Incorrect syntax near the keyword 'AS'. 错误
原因是DbMssql.class.php驱动的查询语句有问题。

由于TP2.0 的 MSSQL 驱动是对SQL 2005有效,但对2000版本则无效,原因是2000版本里没有 ROW_NUMBER 功能,2005才有这个功能作用好像是对数据分页提供便利和效能。

希望官方能够给TP2.0加一个2000的驱动吧,目前采用的临时处理方法是修改ThinkPHP\Lib\Think\Db\Driver\DbMssql.class.php ,将行 25 的 protected $selectSql 在前面加 '//'
并且第326行 的

public function parseLimit($limit) { 
      if(emptyempty($limit)) $limit=1; 
  $limit    =    explode(',',$limit); 
  if(count($limit)>1) 
    $limitStr    =    '(T1.ROW_NUMBER BETWEEN '.$limit[0].' + 1 AND '.$limit[0].' + '.$limit[1].')'; 
      else 
    $limitStr = '(T1.ROW_NUMBER BETWEEN 1 AND '.$limit[0].")"; 
  return $limitStr; 
} 

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改为:

public function parseLimit($limit) { 
  return ''; 
}

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这样更改后,基本可以满足一般的SQL需求,但不能使用LIMIT,因为 MSSQL 2000 的LIMIT方法是以 top N
这样实现的;

如果觉得麻烦,那么就结合 Adodb 类库吧,这个对MSSQL支持相对好很多。要结合 Adodb 类库我的方法如下:

首先下载 Adodb 类库并解压到 ThinkPHP 的 Vendor 目录中,并把 adodb.inc.php 改名为 adodb.php
然后在项目的 Lib 里建立一个 CommonAction.class.php 内容为

<&#63;php 
class CommonAction extends Action { 
  public $dbsql; 
  function _initialize() { 
    Vendor('adodb5.adodb'); 
    $adodb = ADONewConnection(C('DB_TYPE')); 
    $adodb->Connect(C('DB_HOST'), C('DB_USER'), C('DB_PWD'), C('DB_NAME')); 
    $adodb->SetFetchMode(ADODB_FETCH_ASSOC); 
    $this->dbsql = $adodb; 
  } 
} 
&#63;>

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在项目的其他文件中都要引用到这个 CommonAction.class.php 文才能使用 ADODB,例如:

<&#63;php 
class IndexAction extends CommonAction { 
  public function index() { 
    $query = $this->dbsql->Execute('select * from xxx'); 
    while($rows = $query->FetchRow()) { 
        echo $rows['fields']; 
     } 
  } 
} 
&#63;>
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这样既能使用 Thinkphp 的模块进行简单的数据查询也能使用 Adodb 进行分页数据的查询,实在是没办法中的办法了,这个是个笨办法哦,还是希望 ThinkPHP 能够出一个 MSSQL 2000 版本能用的完美驱动。

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