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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>
// +----------------------------------------------------------------------
// $Id: DbMssql.class.php 2729 2012-02-12 04:13:34Z liu21st $
/**
+-----------------------------------------
* MSsql数据库驱动类 针对sqlserver2005
+-----------------------------------------
*/
class DbMssql 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%';
/**
+----------------------------------------------------------
* 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'])) {
$this->config['params'] = array();
}
}
}
/**
+----------------------------------------------------------
* 连接数据库方法
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function connect($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);
}
return $this->linkID[$linkNum];
}
/**
+----------------------------------------------------------
* 释放查询结果
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function free() {
mssql_free_result($this->queryID);
$this->queryID = null;
}
/**
+----------------------------------------------------------
* 执行查询 返回数据集
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $str sql指令
+----------------------------------------------------------
* @return mixed
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function query($str) {
$this->initConnect(false);
if ( !$this->_linkID ) return false;
$this->queryStr = $str;
//释放前次的查询结果
if ( $this->queryID ) $this->free();
N('db_query',1);
// 记录开始执行时间
G('queryStartTime');
$this->queryID = mssql_query($str, $this->_linkID);
$this->debug();
if ( false === $this->queryID ) {
$this->error();
return false;
} else {
$this->numRows = mssql_num_rows($this->queryID);
return $this->getAll();
}
}
/**
+----------------------------------------------------------
* 执行语句
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param string $str sql指令
+----------------------------------------------------------
* @return integer
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function execute($str) {
$this->initConnect(true);
if ( !$this->_linkID ) return false;
$this->queryStr = $str;
//释放前次的查询结果
if ( $this->queryID ) $this->free();
N('db_write',1);
// 记录开始执行时间
G('queryStartTime');
$result = mssql_query($str, $this->_linkID);
$this->debug();
if ( false === $result ) {
$this->error();
return false;
} else {
$this->numRows = mssql_rows_affected($this->_linkID);
$this->lastInsID = $this->mssql_insert_id();
return $this->numRows;
}
}
/**
+----------------------------------------------------------
* 用于获取最后插入的ID
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return integer
+----------------------------------------------------------
*/
public function mssql_insert_id() {
$query = "SELECT @@IDENTITY as last_insert_id";
$result = mssql_query($query, $this->_linkID);
list($last_insert_id) = mssql_fetch_row($result);
mssql_free_result($result);
return $last_insert_id;
}
/**
+----------------------------------------------------------
* 启动事务
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return void
+----------------------------------------------------------
*/
public function startTrans() {
$this->initConnect(true);
if ( !$this->_linkID ) return false;
//数据rollback 支持
if ($this->transTimes == 0) {
mssql_query('BEGIN TRAN', $this->_linkID);
}
$this->transTimes++;
return ;
}
/**
+----------------------------------------------------------
* 用于非自动提交状态下面的查询提交
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
public function commit() {
if ($this->transTimes > 0) {
$result = mssql_query('COMMIT TRAN', $this->_linkID);
$this->transTimes = 0;
if(!$result){
throw_exception($this->error());
}
}
return true;
}
/**
+----------------------------------------------------------
* 事务回滚
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
*/
public function rollback() {
if ($this->transTimes > 0) {
$result = mssql_query('ROLLBACK TRAN', $this->_linkID);
$this->transTimes = 0;
if(!$result){
throw_exception($this->error());
}
}
return true;
}
/**
+----------------------------------------------------------
* 获得所有的查询数据
+----------------------------------------------------------
* @access private
+----------------------------------------------------------
* @return array
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
private function getAll() {
//返回数据集
$result = array();
if($this->numRows >0) {
while($row = mssql_fetch_assoc($this->queryID))
$result[] = $row;
}
return $result;
}
/**
+----------------------------------------------------------
* 取得数据表的字段信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return array
+----------------------------------------------------------
*/
public function getFields($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 $info;
}
/**
+----------------------------------------------------------
* 取得数据表的字段信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return array
+----------------------------------------------------------
*/
public function getTables($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分析
+----------------------------------------------------------
* @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 $limitStr;
}
/**
+----------------------------------------------------------
* 关闭数据库
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function close() {
if ($this->_linkID){
mssql_close($this->_linkID);
}
$this->_linkID = null;
}
/**
+----------------------------------------------------------
* 数据库错误信息
* 并显示当前的SQL语句
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return string
+----------------------------------------------------------
*/
public function error() {
$this->error = mssql_get_last_message();
if($this->debug && '' != $this->queryStr){
$this->error .= "\n [ SQL语句 ] : ".$this->queryStr;
}
return $this->error;
}
}
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