Zend DB无法模拟MS SQL的限制和偏移量

Question

我使用Zend Framework 1.12来访问MSSQL 2008服务器。我使用FreeTDS作为数据库驱动程序。

我正在使用Zend_Db来生成以下查询。

$obj_sel = $obj_db 
      -> select() 
      -> from (array ('ps' => 'ProductStock'), array ('PLU', 'stock' => 'SUM(ps.stock)')) 
      -> join (array ('pc' => 'ProductCatalogue'), 'ps.PLU = pc.PLU', NULL) 
      -> join (array ('gl' => 'Gemini_Location'), 'ps.Location = gl.LocationID', array ('LocationID')) 
      -> where ('ps.status = 1') 
      -> where ('ps.PLU IS NOT NULL'); 
      > where ('pc.rootPLU >= ?', $this -> int_start_rootplu); 
      -> group ('ps.PLU') 
      -> group ('gl.LocationID') 
      -> order (array ('ps.PLU', 'gl.LocationID')); 

如果我运行并执行此操作，我得到一个查询，似乎工作正常，是正确的。

SELECT "ps"."PLU", SUM(ps.stock) AS "stock", "gl"."LocationID" FROM "ProductStock" AS "ps" 
INNER JOIN "ProductCatalogue" AS "pc" ON ps.PLU = pc.PLU 
INNER JOIN "Gemini_Location" AS "gl" ON ps.Location = gl.LocationID WHERE (ps.status = 1) AND (ps.PLU IS NOT NULL) AND (pc.rootPLU >= 93838) GROUP BY "ps"."PLU", 
    "gl"."LocationID" ORDER BY "ps"."PLU" ASC, "gl"."LocationID" ASC 

但是当我尝试添加偏移到查询像这样的限制或：

$obj_sel = $obj_db 
      -> select() 
      -> from (array ('ps' => 'ProductStock'), array ('PLU', 'stock' => 'SUM(ps.stock)')) 
      -> join (array ('pc' => 'ProductCatalogue'), 'ps.PLU = pc.PLU', NULL) 
      -> join (array ('gl' => 'Gemini_Location'), 'ps.Location = gl.LocationID', array ('LocationID')) 
      -> where ('ps.status = 1') 
      -> where ('ps.PLU IS NOT NULL'); 
      > where ('pc.rootPLU >= ?', $this -> int_start_rootplu); 
      -> group ('ps.PLU') 
      -> group ('gl.LocationID') 
      -> order (array ('ps.PLU', 'gl.LocationID')) 
      -> limit (1000,2000); 

我得到的SQL Server拒不执行下面的查询。

SELECT * FROM (SELECT TOP 1000 * FROM (SELECT TOP 3000 "ps"."PLU", SUM(ps.stock) AS "stock", "gl"."LocationID" FROM "ProductStock" AS "ps" 
INNER JOIN "ProductCatalogue" AS "pc" ON ps.PLU = pc.PLU 
INNER JOIN "Gemini_Location" AS "gl" ON ps.Location = gl.LocationID WHERE (ps.status = 1) AND (ps.PLU IS NOT NULL) AND (pc.rootPLU >= 93838) GROUP BY "ps"."PLU", 
    "gl"."LocationID" ORDER BY "ps"."PLU" ASC, "gl"."LocationID" ASC) AS inner_tbl ORDER BY "ps"."PLU" , "gl"."LocationID" DESC) AS outer_tbl ORDER BY "ps"."PLU" , "gl"."LocationID" asc 

我得到以下错误：

SQLSTATE[HY000]: General error: 4104 General SQL Server error: Check messages from the SQL Server [4104] (severity 16) [(null)]

我不熟悉MSSQL，因为我使用MySQL或Postgres的，所以我不得不假设TOP技术是正确的。但是，很显然，无论SQL Zend DB在这里生成的都是不正确的。

这是Zend DB中的一个已知问题吗？如果是这样，我该如何解决它？

Answer 1

虽然ZF 2没有，但ZF 1并未在SQL Server上正确实现分页。

我已经通过继承Zend_Db_Adapter_Pdo_Mssql解决了这个问题：

class My_Zend_Db_Adapter_Pdo_Mssql extends Zend_Db_Adapter_Pdo_Mssql 
{ 
    /** 
    * @see Zend_Db_Adapter_Pdo_Mssql::limit() 
    */ 
    public function limit($sql, $count, $offset = 0) 
    { 
     $count = intval($count); 
     if ($count <= 0) { 
      /** @see Zend_Db_Adapter_Exception */ 
      require_once 'Zend/Db/Adapter/Exception.php'; 
      throw new Zend_Db_Adapter_Exception('count parameter invalid: ' . $count); 
     } 

     $offset = intval($offset); 
     if ($offset < 0) { 
      /** @see Zend_Db_Adapter_Exception */ 
      require_once 'Zend/Db/Adapter/Exception.php'; 
      throw new Zend_Db_Adapter_Exception('offset parameter invalid: ' . $count); 
     } 

     if (0 == $offset) { 
      $sql = preg_replace('/^SELECT\s+(DISTINCT\s)?/i', 'SELECT $1TOP ' . ($count+$offset) . ' ', $sql); 
      return $sql; 
     } 

     $selectStart = stripos($sql, 'SELECT'); 
     $fromStart = stripos($sql, 'FROM'); 

     $orderby = stristr($sql, 'ORDER BY'); 

     if ($orderby === false) { 
      $orderby = 'ORDER BY (SELECT 1)'; 
     } 

     $sql = rtrim(str_replace($orderby, '', $sql)); 

     $selectParams = trim(substr($sql, $selectStart + 6, $fromStart - $selectStart - 6)); 
     $selectParams .= ', ROW_NUMBER() OVER (' . $orderby . ') AS [ZEND_ROW_NUMBER]'; 

     $sql = substr($sql, 0, $selectStart + 6) . ' ' . $selectParams . ' ' . substr($sql, $fromStart); 

     $outerSql = 'SELECT * FROM (' . $sql . ') AS [ZEND_OFFSET_EMULATION]' 
        . ' WHERE [ZEND_OFFSET_EMULATION].[ZEND_ROW_NUMBER] BETWEEN ' 
        . ($offset + 1) . ' AND ' 
        . ($offset + $count) 
        . ' ORDER BY [ZEND_ROW_NUMBER] ASC'; 

     return $outerSql; 
    } 
}