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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: DbIbase.class.php 2729 2012-02-12 04:13:34Z liu21st $
/**
+----------------------------------------
* Firebird数据库驱动类 剑雷 2007.12.28
+----------------------------------------
*/
class DbIbase extends Db{
protected $selectSql = 'SELECT %LIMIT% %DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%';
/**
+----------------------------------------------------------
* 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 ( !extension_loaded('interbase') ) {
throw_exception(L('_NOT_SUPPERT_').':Interbase or Firebird');
}
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 ? 'ibase_pconnect':'ibase_connect';
// 处理不带端口号的socket连接情况
$host = $config['hostname'].($config['hostport']?"/{$config['hostport']}":'');
$this->linkID[$linkNum] = $conn($host.':'.$config['database'], $config['username'], $config['password'],C('DB_CHARSET'),0,3);
if ( !$this->linkID[$linkNum]) {
throw_exception(ibase_errmsg());
}
// 标记连接成功
$this->connected = true;
// 注销数据库连接配置信息
if(1 != C('DB_DEPLOY_TYPE')) unset($this->config);
}
return $this->linkID[$linkNum];
}
/**
+----------------------------------------------------------
* 释放查询结果
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function free() {
ibase_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');
$this->queryID = ibase_query($this->_linkID, $str);
$this->debug();
if ( false === $this->queryID ) {
$this->error();
return false;
} else {
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');
$result = ibase_query($this->_linkID, $str) ;
$this->debug();
if ( false === $result) {
$this->error();
return false;
} else {
$this->numRows = ibase_affected_rows($this->_linkID);
$this->lastInsID =0;
return $this->numRows;
}
}
public function startTrans() {
$this->initConnect(true);
if ( !$this->_linkID ) return false;
//数据rollback 支持
if ($this->transTimes == 0) {
ibase_trans( IBASE_DEFAULT, $this->_linkID);
}
$this->transTimes++;
return ;
}
/**
+----------------------------------------------------------
* 用于非自动提交状态下面的查询提交
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function commit() {
if ($this->transTimes > 0) {
$result = ibase_commit($this->_linkID);
$this->transTimes = 0;
if(!$result){
throw_exception($this->error());
}
}
return true;
}
/**
+----------------------------------------------------------
* 事务回滚
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return boolen
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function rollback() {
if ($this->transTimes > 0) {
$result =ibase_rollback($this->_linkID);
$this->transTimes = 0;
if(!$result){
throw_exception($this->error());
}
}
return true;
}
/**
+----------------------------------------------------------
* BLOB字段解密函数 Firebird特有
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @param $blob 待解密的BLOB
+----------------------------------------------------------
* @return 二进制数据
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function BlobDecode($blob) {
$maxblobsize = 262144;
$blob_data = ibase_blob_info($this->_linkID, $blob );
$blobid = ibase_blob_open($this->_linkID, $blob );
if( $blob_data[0] > $maxblobsize ) {
$realblob = ibase_blob_get($blobid, $maxblobsize);
while($string = ibase_blob_get($blobid, 8192)){
$realblob .= $string;
}
} else {
$realblob = ibase_blob_get($blobid, $blob_data[0]);
}
ibase_blob_close( $blobid );
return( $realblob );
}
/**
+----------------------------------------------------------
* 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();
while ( $row = ibase_fetch_assoc($this->queryID)) {
$result[] = $row;
}
//剑雷 2007.12.30 自动解密BLOB字段
//取BLOB字段清单
$bloblist = array();
$fieldCount = ibase_num_fields($this->queryID);
for ($i = 0; $i < $fieldCount; $i++) {
$col_info = ibase_field_info($this->queryID, $i);
if ($col_info['type']=='BLOB') {
$bloblist[]=trim($col_info['name']);
}
}
//如果有BLOB字段,就进行解密处理
if (!empty($bloblist)) {
$i=0;
foreach ($result as $row) {
foreach($bloblist as $field) {
if (!empty($row[$field])) $result[$i][$field]=$this->BlobDecode($row[$field]);
}
$i++;
}
}
return $result;
}
/**
+----------------------------------------------------------
* 取得数据表的字段信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function getFields($tableName) {
$result = $this->query('SELECT RDB$FIELD_NAME AS FIELD, RDB$DEFAULT_VALUE AS DEFAULT1, RDB$NULL_FLAG AS NULL1 FROM RDB$RELATION_FIELDS WHERE RDB$RELATION_NAME=UPPER(\''.$tableName.'\') ORDER By RDB$FIELD_POSITION');
$info = array();
if($result) {
foreach ($result as $key => $val) {
$info[trim($val['FIELD'])] = array(
'name' => trim($val['FIELD']),
'type' => '',
'notnull' => (bool) ($val['NULL1'] ==1), // 1表示不为Null
'default' => $val['DEFAULT1'],
'primary' => false,
'autoinc' => false,
);
}
}
//剑雷 取表字段类型
$sql='select first 1 * from '. $tableName;
$rs_temp = ibase_query ($this->_linkID, $sql);
$fieldCount = ibase_num_fields($rs_temp);
for ($i = 0; $i < $fieldCount; $i++)
{
$col_info = ibase_field_info($rs_temp, $i);
$info[trim($col_info['name'])]['type']=$col_info['type'];
}
ibase_free_result ($rs_temp);
//剑雷 取表的主键
$sql='select b.rdb$field_name as FIELD_NAME from rdb$relation_constraints a join rdb$index_segments b
on a.rdb$index_name=b.rdb$index_name
where a.rdb$constraint_type=\'PRIMARY KEY\' and a.rdb$relation_name=UPPER(\''.$tableName.'\')';
$rs_temp = ibase_query ($this->_linkID, $sql);
while ($row=ibase_fetch_object($rs_temp)) {
$info[trim($row->FIELD_NAME)]['primary']=True;
}
ibase_free_result ($rs_temp);
return $info;
}
/**
+----------------------------------------------------------
* 取得数据库的表信息
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function getTables($dbName='') {
$sql='SELECT DISTINCT RDB$RELATION_NAME FROM RDB$RELATION_FIELDS WHERE RDB$SYSTEM_FLAG=0';
$result = $this->query($sql);
$info = array();
foreach ($result as $key => $val) {
$info[$key] = trim(current($val));
}
return $info;
}
/**
+----------------------------------------------------------
* 关闭数据库
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
*/
public function close() {
if ($this->_linkID){
ibase_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
+----------------------------------------------------------
* @throws ThinkExecption
+----------------------------------------------------------
*/
public function error() {
$this->error = ibase_errmsg();
if($this->debug && '' != $this->queryStr){
$this->error .= "\n [ SQL语句 ] : ".$this->queryStr;
}
return $this->error;
}
/**
+----------------------------------------------------------
* limit
+----------------------------------------------------------
* @access public
+----------------------------------------------------------
* @return string
+----------------------------------------------------------
*/
public function parseLimit($limit) {
$limitStr = '';
if(!empty($limit)) {
$limit = explode(',',$limit);
if(count($limit)>1) {
$limitStr = ' FIRST '.($limit[1]-$limit[0]).' SKIP '.$limit[0].' ';
}else{
$limitStr = ' FIRST '.$limit[0].' ';
}
}
return $limitStr;
}
}
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