ThinkPHP/Extend/Driver/Db/DbMssql.class.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

defined('THINK_PATH') or exit();
/**
 * MSsql数据库驱动 要求sqlserver2005
 * @category   Extend
 * @package  Extend
 * @subpackage  Driver.Db
 * @author    liu21st <liu21st@gmail.com>
 */
class DbMssql extends Db{
    protected $selectSql  =     'SELECT T1.* FROM (SELECT thinkphp.*, ROW_NUMBER() OVER (%ORDER%) AS ROW_NUMBER FROM (SELECT %DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%) AS thinkphp) AS T1 %LIMIT%%COMMENT%';
    /**
     * 架构函数 读取数据库配置信息
     * @access public
     * @param array $config 数据库配置数组
     */
    public function __construct($config=''){
        if ( !function_exists('mssql_connect') ) {
            throw_exception(L('_NOT_SUPPERT_').':mssql');
        }
        if(!empty($config)) {
            $this->config	=	$config;
            if(empty($this->config['params'])) {
                $this->config['params'] =   array();
            }
        }
    }

    /**
     * 连接数据库方法
     * @access public
     */
    public function connect($config='',$linkNum=0) {
        if ( !isset($this->linkID[$linkNum]) ) {
            if(empty($config))	$config  =  $this->config;
            $pconnect   = !empty($config['params']['persist'])? $config['params']['persist']:$this->pconnect;
            $conn = $pconnect ? 'mssql_pconnect':'mssql_connect';
            // 处理不带端口号的socket连接情况
            $sepr = IS_WIN ? ',' : ':';
            $host = $config['hostname'].($config['hostport']?$sepr."{$config['hostport']}":'');
            $this->linkID[$linkNum] = $conn( $host, $config['username'], $config['password']);
            if ( !$this->linkID[$linkNum] )  throw_exception("Couldn't connect to SQL Server on $host");
            if ( !empty($config['database'])  && !mssql_select_db($config['database'], $this->linkID[$linkNum]) ) {
                throw_exception("Couldn't open database '".$config['database']);
            }
            // 标记连接成功
            $this->connected =  true;
            //注销数据库安全信息
            if(1 != C('DB_DEPLOY_TYPE')) unset($this->config);
        }