1 files changed, 426 insertions, 0 deletions
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
new file mode 100644
index 000000000..705b16560
--- /dev/null
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -0,0 +1,426 @@
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst.  It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package		CodeIgniter
+ * @author		EllisLab Dev Team
+ * @copyright	Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link		http://codeigniter.com
+ * @since		Version 2.1.0
+ * @filesource
+ */
+
+/**
+ * PDO Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package		CodeIgniter
+ * @subpackage	Drivers
+ * @category	Database
+ * @author		EllisLab Dev Team
+ * @link		http://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_driver extends CI_DB {
+
+	public $dbdriver = 'pdo';
+
+	// The character used to escaping
+	protected $_escape_char = '"';
+
+	// clause and character used for LIKE escape sequences
+	protected $_like_escape_str = " ESCAPE '%s' ";
+	protected $_like_escape_chr = '!';
+
+	protected $_random_keyword;
+
+	public $trans_enabled = FALSE;
+
+	// need to track the PDO options
+	public $options = array();
+
+	/**
+	 * Constructor
+	 *
+	 * Validates the DSN string and/or detects the subdriver
+	 *
+	 * @param	array
+	 * @return	void
+	 */
+	public function __construct($params)
+	{
+		parent::__construct($params);
+
+		if (preg_match('/([^;]+):/', $this->dsn, $match) && count($match) === 2)
+		{
+			// If there is a minimum valid dsn string pattern found, we're done
+			// This is for general PDO users, who tend to have a full DSN string.
+			$this->subdriver = $match[1];
+			return;
+		}
+		// Legacy support for DSN specified in the hostname field
+		elseif (preg_match('/([^;]+):/', $this->hostname, $match) && count($match) === 2)
+		{
+			$this->dsn = $this->hostname;
+			$this->hostname = NULL;
+			$this->subdriver = $match[1];
+			return;
+		}
+		elseif (in_array($this->subdriver, array('mssql', 'sybase'), TRUE))
+		{
+			$this->subdriver = 'dblib';
+		}
+		elseif ($this->subdriver === '4D')
+		{
+			$this->subdriver = '4d';
+		}
+		elseif ( ! in_array($this->subdriver, array('4d', 'cubrid', 'dblib', 'firebird', 'ibm', 'informix', 'mysql', 'oci', 'odbc', 'sqlite', 'sqlsrv'), TRUE))
+		{
+			log_message('error', 'PDO: Invalid or non-existent subdriver');
+
+			if ($this->db_debug)
+			{
+				show_error('Invalid or non-existent PDO subdriver');
+			}
+		}
+
+		$this->dsn = NULL;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Non-persistent database connection
+	 *
+	 * @param	bool
+	 * @return	object
+	 */
+	public function db_connect($persistent = FALSE)
+	{
+		$this->options[PDO::ATTR_PERSISTENT] = $persistent;
+
+		// Connecting...
+		try
+		{
+			return @new PDO($this->dsn, $this->username, $this->password, $this->options);
+		}
+		catch (PDOException $e)
+		{
+			if ($this->db_debug && empty($this->failover))
+			{
+				$this->display_error($e->getMessage(), '', TRUE);
+			}
+
+			return FALSE;
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Persistent database connection
+	 *
+	 * @return	object
+	 */
+	public function db_pconnect()
+	{
+		return $this->db_connect(TRUE);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Database version number
+	 *
+	 * @return	string
+	 */
+	public function version()
+	{
+		if (isset($this->data_cache['version']))
+		{
+			return $this->data_cache['version'];
+		}
+
+		// Not all subdrivers support the getAttribute() method
+		try
+		{
+			return $this->data_cache['version'] = $this->conn_id->getAttribute(PDO::ATTR_SERVER_VERSION);
+		}
+		catch (PDOException $e)
+		{
+			return parent::version();
+		}
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Execute the query
+	 *
+	 * @param	string	an SQL query
+	 * @return	mixed
+	 */
+	protected function _execute($sql)
+	{
+		return $this->conn_id->query($sql);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Begin Transaction
+	 *
+	 * @return	bool
+	 */
+	public function trans_begin($test_mode = FALSE)
+	{
+		// When transactions are nested we only begin/commit/rollback the outermost ones
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
+		{
+			return TRUE;
+		}
+
+		// Reset the transaction failure flag.
+		// If the $test_mode flag is set to TRUE transactions will be rolled back
+		// even if the queries produce a successful result.
+		$this->_trans_failure = ($test_mode === TRUE);
+
+		return $this->conn_id->beginTransaction();
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Commit Transaction
+	 *
+	 * @return	bool
+	 */
+	public function trans_commit()
+	{
+		// When transactions are nested we only begin/commit/rollback the outermost ones
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
+		{
+			return TRUE;
+		}
+
+		return $this->conn_id->commit();
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Rollback Transaction
+	 *
+	 * @return	bool
+	 */
+	public function trans_rollback()
+	{
+		// When transactions are nested we only begin/commit/rollback the outermost ones
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
+		{
+			return TRUE;
+		}
+
+		return $this->conn_id->rollBack();
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Escape String
+	 *
+	 * @param	string
+	 * @param	bool	whether or not the string will be used in a LIKE condition
+	 * @return	string
+	 */
+	public function escape_str($str, $like = FALSE)
+	{
+		if (is_array($str))
+		{
+			foreach ($str as $key => $val)
+			{
+				$str[$key] = $this->escape_str($val, $like);
+			}
+
+			return $str;
+		}
+
+		// Escape the string
+		$str = $this->conn_id->quote($str);
+
+		// If there are duplicated quotes, trim them away
+		if ($str[0] === "'")
+		{
+			$str = substr($str, 1, -1);
+		}
+
+		// escape LIKE condition wildcards
+		if ($like === TRUE)
+		{
+			return str_replace(array($this->_like_escape_chr, '%', '_'),
+						array($this->_like_escape_chr.$this->_like_escape_chr, $this->_like_escape_chr.'%', $this->_like_escape_chr.'_'),
+						$str);
+		}
+
+		return $str;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Affected Rows
+	 *
+	 * @return	int
+	 */
+	public function affected_rows()
+	{
+		return is_object($this->result_id) ? $this->result_id->rowCount() : 0;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Insert ID
+	 *
+	 * @param	string
+	 * @return	int
+	 */
+	public function insert_id($name = NULL)
+	{
+		return $this->conn_id->lastInsertId($name);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Field data query
+	 *
+	 * Generates a platform-specific query so that the column data can be retrieved
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _field_data($table)
+	{
+		return 'SELECT TOP 1 * FROM '.$this->protect_identifiers($table);
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Error
+	 *
+	 * Returns an array containing code and message of the last
+	 * database error that has occured.
+	 *
+	 * @return	array
+	 */
+	public function error()
+	{
+		$error = array('code' => '00000', 'message' => '');
+		$pdo_error = $this->conn_id->errorInfo();
+
+		if (empty($pdo_error[0]))
+		{
+			return $error;
+		}
+
+		$error['code'] = isset($pdo_error[1]) ? $pdo_error[0].'/'.$pdo_error[1] : $pdo_error[0];
+		if (isset($pdo_error[2]))
+		{
+			 $error['message'] = $pdo_error[2];
+		}
+
+		return $error;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Update_Batch statement
+	 *
+	 * Generates a platform-specific batch update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @return	string
+	 */
+	protected function _update_batch($table, $values, $index, $where = NULL)
+	{
+		$ids = array();
+		$where = ($where !== '' && count($where) >=1) ? implode(' ', $where).' AND ' : '';
+
+		foreach ($values as $key => $val)
+		{
+			$ids[] = $val[$index];
+
+			foreach (array_keys($val) as $field)
+			{
+				if ($field !== $index)
+				{
+					$final[$field][] =  'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
+				}
+			}
+		}
+
+		$sql   = 'UPDATE '.$table.' SET ';
+		$cases = '';
+
+		foreach ($final as $k => $v)
+		{
+			$cases .= $k.' = CASE '."\n";
+
+			foreach ($v as $row)
+			{
+				$cases .= $row."\n";
+			}
+
+			$cases .= 'ELSE '.$k.' END, ';
+		}
+
+		$sql .= substr($cases, 0, -2);
+		$sql .= ' WHERE '.$where.$index.' IN ('.implode(',', $ids).')';
+
+		return $sql;
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
+	 * Truncate statement
+	 *
+	 * Generates a platform-specific truncate string from the supplied data
+	 *
+	 * If the database does not support the truncate() command,
+	 * then this method maps to 'DELETE FROM table'
+	 *
+	 * @param	string	the table name
+	 * @return	string
+	 */
+	protected function _truncate($table)
+	{
+		return 'TRUNCATE TABLE '.$table;
+	}
+
+}
+
+/* End of file pdo_driver.php */
+/* Location: ./system/database/drivers/pdo/pdo_driver.php */