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部分类库从Think命名空间移到Org
Think目录移入Library目录
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ThinkPHP
170
Library/Think/Db/Driver/Oracle.php
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170
Library/Think/Db/Driver/Oracle.php
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<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2012 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace Think\Db\Driver;
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use Think\Db\Driver;
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/**
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* Oracle数据库驱动
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* @category Extend
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* @package Extend
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* @subpackage Driver.Db
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* @author ZhangXuehun <zhangxuehun@sohu.com>
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*/
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class Oracle extends Driver{
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private $table = '';
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protected $selectSql = 'SELECT * FROM (SELECT thinkphp.*, rownum AS numrow FROM (SELECT %DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%) thinkphp ) %LIMIT%%COMMENT%';
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/**
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* 执行语句
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* @access public
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* @param string $str sql指令
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* @return integer
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*/
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public function execute($str,$bind=[]) {
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$this->initConnect(true);
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if ( !$this->_linkID ) return false;
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$this->queryStr = $str;
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$flag = false;
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if(preg_match("/^\s*(INSERT\s+INTO)\s+(\w+)\s+/i", $this->queryStr, $match)) {
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$this->table = C("DB_SEQUENCE_PREFIX").str_ireplace(C("DB_PREFIX"), "", $match[2]);
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$flag = (boolean)$this->query("SELECT * FROM user_sequences WHERE sequence_name='" . strtoupper($this->table) . "'");
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}
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//释放前次的查询结果
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if ( !empty($this->PDOStatement) ) $this->free();
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$this->executeTimes++;
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// 记录开始执行时间
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$this->debug(true);
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$this->PDOStatement = $this->_linkID->prepare($str);
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if(false === $this->PDOStatement) {
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E($this->error());
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}
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$result = $this->PDOStatement->execute($bind);
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$this->debug(false);
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if ( false === $result) {
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$this->error();
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return false;
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} else {
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$this->numRows = $this->PDOStatement->rowCount();
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if($flag || preg_match("/^\s*(INSERT\s+INTO|REPLACE\s+INTO)\s+/i", $str)) {
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$this->lastInsID = $this->getLastInsertId();
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}
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return $this->numRows;
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}
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}
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/**
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* 取得数据表的字段信息
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* @access public
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*/
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public function getFields($tableName) {
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$result = $this->query("select a.column_name,data_type,decode(nullable,'Y',0,1) notnull,data_default,decode(a.column_name,b.column_name,1,0) pk "
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."from user_tab_columns a,(select column_name from user_constraints c,user_cons_columns col "
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."where c.constraint_name=col.constraint_name and c.constraint_type='P'and c.table_name='".strtoupper($tableName)
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."') b where table_name='".strtoupper($tableName)."' and a.column_name=b.column_name(+)");
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$info = [];
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if($result) {
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foreach ($result as $key => $val) {
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$info[strtolower($val['column_name'])] = [
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'name' => strtolower($val['column_name']),
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'type' => strtolower($val['data_type']),
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'notnull' => $val['notnull'],
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'default' => $val['data_default'],
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'primary' => $val['pk'],
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'autoinc' => $val['pk'],
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];
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}
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}
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return $info;
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}
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/**
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* 取得数据库的表信息（暂时实现取得用户表信息）
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* @access public
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*/
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public function getTables($dbName='') {
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$result = $this->query("select table_name from user_tables");
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$info = [];
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foreach ($result as $key => $val) {
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$info[$key] = current($val);
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}
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return $info;
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}
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/**
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* SQL指令安全过滤
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* @access public
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* @param string $str SQL指令
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* @return string
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*/
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public function escapeString($str) {
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return str_ireplace("'", "''", $str);
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}
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/**
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* 获取最后插入id ,仅适用于采用序列+触发器结合生成ID的方式
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* 在config.php中指定
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'DB_TRIGGER_PREFIX' => 'tr_',
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'DB_SEQUENCE_PREFIX' => 'ts_',
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* eg:表 tb_user
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相对tb_user的序列为：
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-- Create sequence
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create sequence TS_USER
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minvalue 1
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maxvalue 999999999999999999999999999
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start with 1
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increment by 1
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nocache;
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相对tb_user,ts_user的触发器为：
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create or replace trigger TR_USER
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before insert on "TB_USER"
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for each row
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begin
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select "TS_USER".nextval into :NEW.ID from dual;
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end;
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* @access public
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* @return integer
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*/
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public function getLastInsertId() {
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if(empty($this->table)) {
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return 0;
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}
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$sequenceName = $this->table;
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$vo = $this->query("SELECT {$sequenceName}.currval currval FROM dual");
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return $vo?$vo[0]["currval"]:0;
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}
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/**
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* limit
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* @access public
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* @return string
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*/
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public function parseLimit($limit) {
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$limitStr = '';
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if(!empty($limit)) {
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$limit = explode(',',$limit);
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if(count($limit)>1)
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$limitStr = "(numrow>" . $limit[0] . ") AND (numrow<=" . ($limit[0]+$limit[1]) . ")";
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else
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$limitStr = "(numrow>0 AND numrow<=".$limit[0].")";
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}
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return $limitStr?' WHERE '.$limitStr:'';
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}
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/**
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* 设置锁机制
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* @access protected
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* @return string
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*/
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protected function parseLock($lock=false) {
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if(!$lock) return '';
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return ' FOR UPDATE NOWAIT ';
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}
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}
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