system/database/drivers/pdo/pdo_driver.php - code-igniter-v3-giggi - Gitiles

 <?php
 /**
  * CodeIgniter
  *
  * An open source application development framework for PHP
  *
  * This content is released under the MIT License (MIT)
  *
  * Copyright (c) 2014 - 2015, British Columbia Institute of Technology
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  *
  * @package	CodeIgniter
  * @author	EllisLab Dev Team
  * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
  * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
  * @license	http://opensource.org/licenses/MIT	MIT License
  * @link	http://codeigniter.com
  * @since	Version 2.1.0
  * @filesource
  */
 defined('BASEPATH') OR exit('No direct script access allowed');

 /**
  * 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 {

 	/**
 	 * Database driver
 	 *
 	 * @var	string
 	 */
 	public $dbdriver = 'pdo';

 	/**
 	 * PDO Options
 	 *
 	 * @var	array
 	 */
 	public $options = array();

 	// --------------------------------------------------------------------

 	/**
 	 * Class constructor
 	 *
 	 * Validates the DSN string and/or detects the subdriver.
 	 *
 	 * @param	array	$params
 	 * @return	void
 	 */
 	public function __construct($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', 'pgsql', '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;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Database connection
 	 *
 	 * @param	bool	$persistent
 	 * @return	object
 	 */
 	public function db_connect($persistent = FALSE)
 	{
 		$this->options[PDO::ATTR_PERSISTENT] = $persistent;

 		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;
 		}
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * 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	$sql	SQL query
 	 * @return	mixed
 	 */
 	protected function _execute($sql)
 	{
 		return $this->conn_id->query($sql);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Begin Transaction
 	 *
 	 * @param	bool	$test_mode
 	 * @return	bool
 	 */
 	public function trans_begin($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();
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Platform-dependant string escape
 	 *
 	 * @param	string
 	 * @return	string
 	 */
 	protected function _escape_str($str)
 	{
 		// Escape the string
 		$str = $this->conn_id->quote($str);

 		// If there are duplicated quotes, trim them away
 		return ($str[0] === "'")
 			? substr($str, 1, -1)
 			: $str;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Affected Rows
 	 *
 	 * @return	int
 	 */
 	public function affected_rows()
 	{
 		return is_object($this->result_id) ? $this->result_id->rowCount() : 0;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Insert ID
 	 *
 	 * @param	string	$name
 	 * @return	int
 	 */
 	public function insert_id($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	$table
 	 * @return	string
 	 */
 	protected function _field_data($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	$table	Table name
 	 * @param	array	$values	Update data
 	 * @param	string	$index	WHERE key
 	 * @return	string
 	 */
 	protected function _update_batch($table, $values, $index)
 	{
 		$ids = array();
 		foreach ($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];
 				}
 			}
 		}

 		$cases = '';
 		foreach ($final as $k => $v)
 		{
 			$cases .= $k.' = CASE '."\n";

 			foreach ($v as $row)
 			{
 				$cases .= $row."\n";
 			}

 			$cases .= 'ELSE '.$k.' END, ';
 		}

 		$this->where($index.' IN('.implode(',', $ids).')', NULL, FALSE);

 		return 'UPDATE '.$table.' SET '.substr($cases, 0, -2).$this->_compile_wh('qb_where');
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Truncate statement
 	 *
 	 * Generates a platform-specific truncate string from the supplied data
 	 *
 	 * If the database does not support the TRUNCATE statement,
 	 * then this method maps to 'DELETE FROM table'
 	 *
 	 * @param	string	$table
 	 * @return	string
 	 */
 	protected function _truncate($table)
 	{
 		return 'TRUNCATE TABLE '.$table;
 	}

 }
	<?php
	/**
	* CodeIgniter
	*
	* An open source application development framework for PHP
	*
	* This content is released under the MIT License (MIT)
	*
	* Copyright (c) 2014 - 2015, British Columbia Institute of Technology
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*
	* @package CodeIgniter
	* @author EllisLab Dev Team
	* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
	* @copyright Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
	* @license http://opensource.org/licenses/MIT MIT License
	* @link http://codeigniter.com
	* @since Version 2.1.0
	* @filesource
	*/
	defined('BASEPATH') OR exit('No direct script access allowed');

	/**
	* 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 {

	/**
	* Database driver
	*
	* @var string
	*/
	public $dbdriver = 'pdo';

	/**
	* PDO Options
	*
	* @var array
	*/
	public $options = array();

	// --------------------------------------------------------------------

	/**
	* Class constructor
	*
	* Validates the DSN string and/or detects the subdriver.
	*
	* @param array $params
	* @return void
	*/
	public function __construct($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', 'pgsql', '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;
	}

	// --------------------------------------------------------------------

	/**
	* Database connection
	*
	* @param bool $persistent
	* @return object
	*/
	public function db_connect($persistent = FALSE)
	{
	$this->options[PDO::ATTR_PERSISTENT] = $persistent;

	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;
	}
	}

	// --------------------------------------------------------------------

	/**
	* 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 $sql SQL query
	* @return mixed
	*/
	protected function _execute($sql)
	{
	return $this->conn_id->query($sql);
	}

	// --------------------------------------------------------------------

	/**
	* Begin Transaction
	*
	* @param bool $test_mode
	* @return bool
	*/
	public function trans_begin($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();
	}

	// --------------------------------------------------------------------

	/**
	* Platform-dependant string escape
	*
	* @param string
	* @return string
	*/
	protected function _escape_str($str)
	{
	// Escape the string
	$str = $this->conn_id->quote($str);

	// If there are duplicated quotes, trim them away
	return ($str[0] === "'")
	? substr($str, 1, -1)
	: $str;
	}

	// --------------------------------------------------------------------

	/**
	* Affected Rows
	*
	* @return int
	*/
	public function affected_rows()
	{
	return is_object($this->result_id) ? $this->result_id->rowCount() : 0;
	}

	// --------------------------------------------------------------------

	/**
	* Insert ID
	*
	* @param string $name
	* @return int
	*/
	public function insert_id($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 $table
	* @return string
	*/
	protected function _field_data($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 $table Table name
	* @param array $values Update data
	* @param string $index WHERE key
	* @return string
	*/
	protected function _update_batch($table, $values, $index)
	{
	$ids = array();
	foreach ($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];
	}
	}
	}

	$cases = '';
	foreach ($final as $k => $v)
	{
	$cases .= $k.' = CASE '."\n";

	foreach ($v as $row)
	{
	$cases .= $row."\n";
	}

	$cases .= 'ELSE '.$k.' END, ';
	}

	$this->where($index.' IN('.implode(',', $ids).')', NULL, FALSE);

	return 'UPDATE '.$table.' SET '.substr($cases, 0, -2).$this->_compile_wh('qb_where');
	}

	// --------------------------------------------------------------------

	/**
	* Truncate statement
	*
	* Generates a platform-specific truncate string from the supplied data
	*
	* If the database does not support the TRUNCATE statement,
	* then this method maps to 'DELETE FROM table'
	*
	* @param string $table
	* @return string
	*/
	protected function _truncate($table)
	{
	return 'TRUNCATE TABLE '.$table;
	}

	}