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198 lines
6.2 KiB
198 lines
6.2 KiB
<?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) 2006-2014 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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*/
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class Oracle extends Driver
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{
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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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* 解析pdo连接的dsn信息
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* @access public
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* @param array $config 连接信息
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* @return string
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*/
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protected function parseDsn($config)
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{
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$dsn = 'oci:dbname=//' . $config['hostname'] . ($config['hostport'] ? ':' . $config['hostport'] : '') . '/' . $config['database'];
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if (!empty($config['charset'])) {
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$dsn .= ';charset=' . $config['charset'];
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}
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return $dsn;
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}
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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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* @param boolean $fetchSql 不执行只是获取SQL
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* @return integer
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*/
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public function execute($str, $fetchSql = false)
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{
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$this->initConnect(true);
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if (!$this->_linkID) {
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return false;
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}
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$this->queryStr = $str;
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if (!empty($this->bind)) {
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$that = $this;
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$this->queryStr = strtr($this->queryStr, array_map(function ($val) use ($that) {return '\'' . $that->escapeString($val) . '\'';}, $this->bind));
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}
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if ($fetchSql) {
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return $this->queryStr;
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}
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$flag = false;
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if (preg_match("/^\s*(INSERT\s+INTO)\s+(\w+)\s+/i", $str, $match)) {
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$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($this->PDOStatement)) {
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$this->free();
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}
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$this->executeTimes++;
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N('db_write', 1); // 兼容代码
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// 记录开始执行时间
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$this->debug(true);
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$this->PDOStatement = $this->_linkID->prepare($str);
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if (false === $this->PDOStatement) {
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$this->error();
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return false;
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}
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foreach ($this->bind as $key => $val) {
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if (is_array($val)) {
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$this->PDOStatement->bindValue($key, $val[0], $val[1]);
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} else {
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$this->PDOStatement->bindValue($key, $val);
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}
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}
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$this->bind = array();
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$result = $this->PDOStatement->execute();
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$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->_linkID->lastInsertId();
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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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{
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list($tableName) = explode(' ', $tableName);
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$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 = array();
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if ($result) {
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foreach ($result as $key => $val) {
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$info[strtolower($val['column_name'])] = array(
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'name' => strtolower($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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{
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$result = $this->query("select table_name from user_tables");
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$info = array();
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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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{
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return str_ireplace("'", "''", $str);
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}
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/**
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* limit
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* @access public
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* @return string
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*/
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public function parseLimit($limit)
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{
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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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}
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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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{
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if (!$lock) {
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return '';
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}
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return ' FOR UPDATE NOWAIT ';
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}
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/**
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* 随机排序
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* @access protected
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* @return string
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*/
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protected function parseRand()
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{
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return 'DBMS_RANDOM.value';
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}
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}
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