/Extend/Driver/Db/DbSqlsrv.class.php

<?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>

// +----------------------------------------------------------------------

// $Id: DbSqlsrv.class.php 2924 2012-04-20 10:09:32Z liu21st@gmail.com $



/**

 +-------------------------------

 * Sqlsrv?????? 

 +-------------------------------

 */

class DbSqlsrv extends Db{

    protected $selectSql  =     'SELECT T1.* FROM (SELECT ROW_NUMBER() OVER (%ORDER%) AS ROW_NUMBER, thinkphp.* FROM (SELECT %DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%) AS thinkphp) AS T1 WHERE %LIMIT%';

    /**

     +----------------------------------------------------------

     * ???? ?????????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @param array $config ???????

     +----------------------------------------------------------

     */

    public function __construct($config='') {

        if ( !function_exists('sqlsrv_connect') ) {

            throw_exception(L('_NOT_SUPPERT_').':sqlsrv');

        }

        if(!empty($config)) {

            $this->config	=	$config;

        }

    }



    /**

     +----------------------------------------------------------

     * ???????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @throws ThinkExecption

     +----------------------------------------------------------

     */

    public function connect($config='',$linkNum=0) {

        if ( !isset($this->linkID[$linkNum]) ) {

            if(empty($config))	$config  =  $this->config;

            $host = $config['hostname'].($config['hostport']?",{$config['hostport']}":'');

            $connectInfo  =  array('Database'=>$config['database'],'UID'=>$config['username'],'PWD'=>$config['password'],'CharacterSet' => C('DEFAULT_CHARSET'));

            $this->linkID[$linkNum] = sqlsrv_connect( $host, $connectInfo);

            if ( !$this->linkID[$linkNum] )  throw_exception($this->error());

            // ??????

            $this->connected =  true;

            //?????????

            if(1 != C('DB_DEPLOY_TYPE')) unset($this->config);

        }

        return $this->linkID[$linkNum];

    }



    /**

     +----------------------------------------------------------

     * ??????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     */

    public function free() {

        sqlsrv_free_stmt($this->queryID);

        $this->queryID = null;

    }



    /**

     +----------------------------------------------------------

     * ????  ?????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @param string $str  sql??

     +----------------------------------------------------------

     * @return mixed

     +----------------------------------------------------------

     * @throws ThinkExecption

     +----------------------------------------------------------

     */

    public function query($str) {

        $this->initConnect(false);

        if ( !$this->_linkID ) return false;

        $this->queryStr = $str;

        //?????????

        if ( $this->queryID ) $this->free();

        N('db_query',1);

        // ????????

        G('queryStartTime');

        $this->queryID = sqlsrv_query($this->_linkID,$str,array(), array( "Scrollable" => SQLSRV_CURSOR_KEYSET));

        $this->debug();

        if ( false === $this->queryID ) {

            $this->error();

            return false;

        } else {

            $this->numRows = sqlsrv_num_rows($this->queryID);

            return $this->getAll();

        }

    }



    /**

     +----------------------------------------------------------

     * ????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @param string $str  sql??

     +----------------------------------------------------------

     * @return integer

     +----------------------------------------------------------

     * @throws ThinkExecption

     +----------------------------------------------------------

     */

    public function execute($str) {

        $this->initConnect(true);

        if ( !$this->_linkID ) return false;

        $this->queryStr = $str;

        //?????????

        if ( $this->queryID ) $this->free();

        N('db_write',1);

        // ????????

        G('queryStartTime');

        $this->queryID=	sqlsrv_query($this->_linkID,$str,array(), array( "Scrollable" => SQLSRV_CURSOR_KEYSET));

        $this->debug();

        if ( false === $this->queryID ) {

            $this->error();

            return false;

        } else {

            $this->numRows = sqlsrv_rows_affected($this->queryID);

            $this->lastInsID = $this->mssql_insert_id();

            return $this->numRows;

        }

    }



    /**

     +----------------------------------------------------------

     * ?????????ID

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @return integer

     +----------------------------------------------------------

     */

    public function mssql_insert_id() {

        $query  =   "SELECT @@IDENTITY as last_insert_id";

        $result =   sqlsrv_query($this->_linkID,$query);

        list($last_insert_id)   =   sqlsrv_fetch_array($result);

        sqlsrv_free_stmt($result);

        return $last_insert_id;

    }



    /**

     +----------------------------------------------------------

     * ????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @return void

     +----------------------------------------------------------

     */

    public function startTrans() {

        $this->initConnect(true);

        if ( !$this->_linkID ) return false;

        //??rollback ??

        if ($this->transTimes == 0) {

            sqlsrv_begin_transaction($this->_linkID);

        }

        $this->transTimes++;

        return ;

    }



    /**

     +----------------------------------------------------------

     * ????????????????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @return boolen

     +----------------------------------------------------------

     */

    public function commit() {

        if ($this->transTimes > 0) {

            $result = sqlsrv_commit($this->_linkID);

            $this->transTimes = 0;

            if(!$result){

                throw_exception($this->error());

            }

        }

        return true;

    }



    /**

     +----------------------------------------------------------

     * ????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @return boolen

     +----------------------------------------------------------

     */

    public function rollback() {

        if ($this->transTimes > 0) {

            $result = sqlsrv_rollback($this->_linkID);

            $this->transTimes = 0;

            if(!$result){

                throw_exception($this->error());

            }

        }

        return true;

    }



    /**

     +----------------------------------------------------------

     * ?????????

     +----------------------------------------------------------

     * @access private

     +----------------------------------------------------------

     * @return array

     +----------------------------------------------------------

     * @throws ThinkExecption

     +----------------------------------------------------------

     */

    private function getAll() {

        //?????

        $result = array();

        if($this->numRows >0) {

            while($row = sqlsrv_fetch_array($this->queryID,SQLSRV_FETCH_ASSOC))

                $result[]   =   $row;

        }

        return $result;

    }



    /**

     +----------------------------------------------------------

     * ??????????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @return array

     +----------------------------------------------------------

     */

    public function getFields($tableName) {

        $result =   $this->query("SELECT   column_name,   data_type,   column_default,   is_nullable

        FROM    information_schema.tables AS t

        JOIN    information_schema.columns AS c

        ON  t.table_catalog = c.table_catalog

        AND t.table_schema  = c.table_schema

        AND t.table_name    = c.table_name

        WHERE   t.table_name = '$tableName'");

        $info   =   array();

        if($result) {

            foreach ($result as $key => $val) {

                $info[$val['column_name']] = array(

                    'name'    => $val['column_name'],

                    'type'    => $val['data_type'],

                    'notnull' => (bool) ($val['is_nullable'] === ''), // not null is empty, null is yes

                    'default' => $val['column_default'],

                    'primary' => false,

                    'autoinc' => false,

                );

            }

        }

        return $info;

    }



    /**

     +----------------------------------------------------------

     * ??????????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @return array

     +----------------------------------------------------------

     */

    public function getTables($dbName='') {

        $result   =  $this->query("SELECT TABLE_NAME

            FROM INFORMATION_SCHEMA.TABLES

            WHERE TABLE_TYPE = 'BASE TABLE'

            ");

        $info   =   array();

        foreach ($result as $key => $val) {

            $info[$key] = current($val);

        }

        return $info;

    }



	/**

     +----------------------------------------------------------

     * order??

     +----------------------------------------------------------

     * @access protected

     +----------------------------------------------------------

     * @param mixed $order

     +----------------------------------------------------------

     * @return string

     +----------------------------------------------------------

     */

    protected function parseOrder($order) {

        return !empty($order)?  ' ORDER BY '.$order:' ORDER BY rand()';

    }



    /**

     +----------------------------------------------------------

     * limit

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @return string

     +----------------------------------------------------------

     */

    public function parseLimit($limit) {

		if(empty($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;

    }



    /**

     +----------------------------------------------------------

     * ?????

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     */

    public function close() {

        if ($this->_linkID){

            sqlsrv_close($this->_linkID);

        }

        $this->_linkID = null;

    }



    /**

     +----------------------------------------------------------

     * ???????

     * ??????SQL??

     +----------------------------------------------------------

     * @access public

     +----------------------------------------------------------

     * @return string

     +----------------------------------------------------------

     */

    public function error() {

        $this->error = sqlsrv_errors();

        if($this->debug && '' != $this->queryStr){

            $this->error .= "\n [ SQL?? ] : ".$this->queryStr;

        }

        return $this->error;

    }



}