system/database/drivers/cubrid/cubrid_driver.php - code-igniter-v3-giggi - Gitiles

 <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 /**
  * CodeIgniter
  *
  * An open source application development framework for PHP 5.1.6 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 2.0.2
  * @filesource
  */

 /**
  * CUBRID Database Adapter Class
  *
  * Note: _DB is an extender class that the app controller
  * creates dynamically based on whether the active record
  * class is being used or not.
  *
  * @package		CodeIgniter
  * @subpackage	Drivers
  * @category	Database
  * @author		Esen Sagynov
  * @link		http://codeigniter.com/user_guide/database/
  */
 class CI_DB_cubrid_driver extends CI_DB {

 	public $dbdriver = 'cubrid';

 	// The character used for escaping - no need in CUBRID
 	protected $_escape_char = '';

 	// clause and character used for LIKE escape sequences - not used in CUBRID
 	protected $_like_escape_str = '';
 	protected $_like_escape_chr = '';

 	/**
 	 * The syntax to count rows is slightly different across different
 	 * database engines, so this string appears in each driver and is
 	 * used for the count_all() and count_all_results() functions.
 	 */
 	protected $_count_string = 'SELECT COUNT(*) AS ';
 	protected $_random_keyword = ' RAND()'; // database specific random keyword

 	// CUBRID-specific properties
 	public $auto_commit = TRUE;

 	public function __construct($params)
 	{
 		parent::__construct($params);

 		if (preg_match('/^CUBRID:[^:]+(:[0-9][1-9]{0,4})?:[^:]+:[^:]*:[^:]*:(\?.+)?$/', $this->dsn, $matches))
 		{
 			preg_match('/autocommit=on/', $matches[2], $matches) OR $this->auto_commit = FALSE;
 		}
 		else
 		{
 			// If no port is defined by the user, use the default value
 			$this->port == '' OR $this->port = 33000;
 		}
 	}

 	/**
 	 * Non-persistent database connection
 	 *
 	 * @return	resource
 	 */
 	public function db_connect()
 	{
 		return $this->_cubrid_connect();
 	}

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

 	/**
 	 * Persistent database connection
 	 *
 	 * In CUBRID persistent DB connection is supported natively in CUBRID
 	 * engine which can be configured in the CUBRID Broker configuration
 	 * file by setting the CCI_PCONNECT parameter to ON. In that case, all
 	 * connections established between the client application and the
 	 * server will become persistent.
 	 *
 	 * @return	resource
 	 */
 	public function db_pconnect()
 	{
 		return $this->_cubrid_connect(TRUE);
 	}

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

 	/**
 	 * CUBRID connection
 	 *
 	 * A CUBRID-specific method to create a connection to the database.
 	 * Except for determining if a persistent connection should be used,
 	 * the rest of the logic is the same for db_connect() and db_pconnect().
 	 *
 	 * @param	bool
 	 * @return	resource
 	 */
 	protected function _cubrid_connect($persistent = FALSE)
 	{
 		if (preg_match('/^CUBRID:[^:]+(:[0-9][1-9]{0,4})?:[^:]+:([^:]*):([^:]*):(\?.+)?$/', $this->dsn, $matches))
 		{
 			$conn_id = ($matches[2] === '' && $matches[3] === '' && $this->username !== '' && $this->password !== '')
 					? cubrid_connect_with_url($this->dsn, $this->username, $this->password)
 					: cubrid_connect_with_url($this->dsn);
 		}
 		else
 		{
 			$_temp = ($persistent !== TRUE) ? 'cubrid_connect' : 'cubrid_pconnect';
 			$conn_id = ($this->username !== '')
 					? $_temp($this->hostname, $this->port, $this->database, $this->username, $this->password)
 					: $_temp($this->hostname, $this->port, $this->database);
 		}

 		if ($conn_id)
 		{
 			$_temp = ($this->auto_commit) ? CUBRID_AUTOCOMMIT_TRUE : CUBRID_AUTOCOMMIT_FALSE;
 			cubrid_set_autocommit($conn_id, $_temp);
 		}

 		return $conn_id;
 	}

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

 	/**
 	 * Reconnect
 	 *
 	 * Keep / reestablish the db connection if no queries have been
 	 * sent for a length of time exceeding the server's idle timeout
 	 *
 	 * @return	void
 	 */
 	public function reconnect()
 	{
 		if (cubrid_ping($this->conn_id) === FALSE)
 		{
 			$this->conn_id = FALSE;
 		}
 	}

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

 	/**
 	 * Select the database
 	 *
 	 * @return	resource
 	 */
 	public function db_select()
 	{
 		// In CUBRID there is no need to select a database as the database
 		// is chosen at the connection time.
 		// So, to determine if the database is "selected", all we have to
 		// do is ping the server and return that value.
 		return cubrid_ping($this->conn_id);
 	}

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

 	/**
 	 * Set client character set
 	 *
 	 * @param	string
 	 * @param	string
 	 * @return	bool
 	 */
 	public function db_set_charset($charset, $collation)
 	{
 		// Not supported in CUBRID
 		return TRUE;
 	}

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

 	/**
 	 * Version number query string
 	 *
 	 * @return	string
 	 */
 	protected function _version()
 	{
 		return cubrid_get_server_info($this->conn_id);
 	}

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

 	/**
 	 * Execute the query
 	 *
 	 * @param	string	an SQL query
 	 * @return	resource
 	 */
 	protected function _execute($sql)
 	{
 		return @cubrid_query($this->_prep_query($sql), $this->conn_id);
 	}

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

 	/**
 	 * Prep the query
 	 *
 	 * If needed, each database adapter can prep the query string
 	 *
 	 * @param	string	an SQL query
 	 * @return	string
 	 */
 	protected function _prep_query($sql)
 	{
 		return $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);

 		if (cubrid_get_autocommit($this->conn_id))
 		{
 			cubrid_set_autocommit($this->conn_id, CUBRID_AUTOCOMMIT_FALSE);
 		}

 		return TRUE;
 	}

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

 	/**
 	 * 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;
 		}

 		cubrid_commit($this->conn_id);

 		if ($this->auto_commit && ! cubrid_get_autocommit($this->conn_id))
 		{
 			cubrid_set_autocommit($this->conn_id, CUBRID_AUTOCOMMIT_TRUE);
 		}

 		return TRUE;
 	}

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

 	/**
 	 * 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;
 		}

 		cubrid_rollback($this->conn_id);

 		if ($this->auto_commit && ! cubrid_get_autocommit($this->conn_id))
 		{
 			cubrid_set_autocommit($this->conn_id, CUBRID_AUTOCOMMIT_TRUE);
 		}

 		return TRUE;
 	}

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

 	/**
 	 * 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;
 		}

 		if (function_exists('cubrid_real_escape_string') && is_resource($this->conn_id))
 		{
 			$str = cubrid_real_escape_string($str, $this->conn_id);
 		}
 		else
 		{
 			$str = addslashes($str);
 		}

 		// escape LIKE condition wildcards
 		if ($like === TRUE)
 		{
 			return str_replace(array('%', '_'), array('\\%', '\\_'), $str);
 		}

 		return $str;
 	}

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

 	/**
 	 * Affected Rows
 	 *
 	 * @return	int
 	 */
 	public function affected_rows()
 	{
 		return @cubrid_affected_rows($this->conn_id);
 	}

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

 	/**
 	 * Insert ID
 	 *
 	 * @return	int
 	 */
 	public function insert_id()
 	{
 		return @cubrid_insert_id($this->conn_id);
 	}

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

 	/**
 	 * "Count All" query
 	 *
 	 * Generates a platform-specific query string that counts all records in
 	 * the specified table
 	 *
 	 * @param	string
 	 * @return	int
 	 */
 	public function count_all($table = '')
 	{
 		if ($table == '')
 		{
 			return 0;
 		}
 		$query = $this->query($this->_count_string.$this->_protect_identifiers('numrows').' FROM '.$this->_protect_identifiers($table, TRUE, NULL, FALSE));
 		if ($query->num_rows() == 0)
 		{
 			return 0;
 		}

 		$query = $query->row();
 		$this->_reset_select();
 		return (int) $query->numrows;
 	}

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

 	/**
 	 * List table query
 	 *
 	 * Generates a platform-specific query string so that the table names can be fetched
 	 *
 	 * @param	bool
 	 * @return	string
 	 */
 	protected function _list_tables($prefix_limit = FALSE)
 	{
 		$sql = 'SHOW TABLES';

 		if ($prefix_limit !== FALSE && $this->dbprefix != '')
 		{
 			return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";
 		}

 		return $sql;
 	}

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

 	/**
 	 * Show column query
 	 *
 	 * Generates a platform-specific query string so that the column names can be fetched
 	 *
 	 * @param	string	the table name
 	 * @return	string
 	 */
 	protected function _list_columns($table = '')
 	{
 		return 'SHOW COLUMNS FROM '.$this->_protect_identifiers($table, TRUE, NULL, FALSE);
 	}

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

 	/**
 	 * 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($table)
 	{
 		return 'SELECT * FROM '.$table.' LIMIT 1';
 	}

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

 	/**
 	 * The error message string
 	 *
 	 * @return	string
 	 */
 	protected function _error_message()
 	{
 		return cubrid_error($this->conn_id);
 	}

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

 	/**
 	 * The error message number
 	 *
 	 * @return	int
 	 */
 	protected function _error_number()
 	{
 		return cubrid_errno($this->conn_id);
 	}

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

 	/**
 	 * Escape the SQL Identifiers
 	 *
 	 * This function escapes column and table names
 	 *
 	 * @param	string
 	 * @return	string
 	 */
 	public function _escape_identifiers($item)
 	{
 		if ($this->_escape_char == '')
 		{
 			return $item;
 		}

 		foreach ($this->_reserved_identifiers as $id)
 		{
 			if (strpos($item, '.'.$id) !== FALSE)
 			{
 				$item = str_replace('.', $this->_escape_char.'.', $item);

 				// remove duplicates if the user already included the escape
 				return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item);
 			}
 		}

 		if (strpos($item, '.') !== FALSE)
 		{
 			$item = str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
 		}

 		// remove duplicates if the user already included the escape
 		return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item.$this->_escape_char);
 	}

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

 	/**
 	 * From Tables
 	 *
 	 * This function implicitly groups FROM tables so there is no confusion
 	 * about operator precedence in harmony with SQL standards
 	 *
 	 * @param	string	the table name
 	 * @return	string
 	 */
 	protected function _from_tables($tables)
 	{
 		if ( ! is_array($tables))
 		{
 			$tables = array($tables);
 		}

 		return '('.implode(', ', $tables).')';
 	}

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

 	/**
 	 * Insert statement
 	 *
 	 * Generates a platform-specific insert string from the supplied data
 	 *
 	 * @param	string	the table name
 	 * @param	array	the insert keys
 	 * @param	array	the insert values
 	 * @return	string
 	 */
 	protected function _insert($table, $keys, $values)
 	{
 		return 'INSERT INTO '.$table.' ("'.implode('", "', $keys).'") VALUES ('.implode(', ', $values).')';
 	}

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


 	/**
 	 * Replace statement
 	 *
 	 * Generates a platform-specific replace string from the supplied data
 	 *
 	 * @param	string	the table name
 	 * @param	array	the insert keys
 	 * @param	array	the insert values
 	 * @return	string
 	 */
 	protected function _replace($table, $keys, $values)
 	{
 		return 'REPLACE INTO '.$table.' ("'.implode('", "', $keys).'") VALUES ('.implode(', ', $values).')';
 	}

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

 	/**
 	 * Insert_batch statement
 	 *
 	 * Generates a platform-specific insert string from the supplied data
 	 *
 	 * @param	string	the table name
 	 * @param	array	the insert keys
 	 * @param	array	the insert values
 	 * @return	string
 	 */
 	protected function _insert_batch($table, $keys, $values)
 	{
 		return 'INSERT INTO '.$table.' ("'.implode('", "', $keys).'") VALUES '.implode(', ', $values);
 	}

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

 	/**
 	 * Update statement
 	 *
 	 * Generates a platform-specific update string from the supplied data
 	 *
 	 * @param	string	the table name
 	 * @param	array	the update data
 	 * @param	array	the where clause
 	 * @param	array	the orderby clause
 	 * @param	array	the limit clause
 	 * @return	string
 	 */
 	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
 	{
 		foreach ($values as $key => $val)
 		{
 			$valstr[] = sprintf('"%s" = %s', $key, $val);
 		}

 		return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
 			.(($where != '' && count($where) > 0) ? ' WHERE '.implode(' ', $where) : '')
 			.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
 			.( ! $limit ? '' : ' LIMIT '.$limit);
 	}

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


 	/**
 	 * 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)
 	{
 		$ids = array();
 		foreach ($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"
 				.implode("\n", $v)
 				.'ELSE '.$k.' END, ';
 		}

 		return 'UPDATE '.$table.' SET '.substr($cases, 0, -2)
 			.' WHERE '.(($where != '' && count($where) > 0) ? implode(' ', $where).' AND ' : '')
 			.$index.' IN ('.implode(',', $ids).')';
 	}

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

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

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

 	/**
 	 * Delete statement
 	 *
 	 * Generates a platform-specific delete string from the supplied data
 	 *
 	 * @param	string	the table name
 	 * @param	array	the where clause
 	 * @param	string	the limit clause
 	 * @return	string
 	 */
 	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
 	{
 		$conditions = '';

 		if (count($where) > 0 OR count($like) > 0)
 		{
 			$conditions = "\nWHERE ".implode("\n", $where)
 					.((count($where) > 0 && count($like) > 0) ? ' AND ' : '')
 					.implode("\n", $like);
 		}

 		return 'DELETE FROM '.$table.$conditions.( ! $limit ? '' : ' LIMIT '.$limit);
 	}

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

 	/**
 	 * Limit string
 	 *
 	 * Generates a platform-specific LIMIT clause
 	 *
 	 * @param	string	the sql query string
 	 * @param	int	the number of rows to limit the query to
 	 * @param	int	the offset value
 	 * @return	string
 	 */
 	protected function _limit($sql, $limit, $offset)
 	{
 		return $sql.'LIMIT '.($offset == 0 ? '' : $offset.', ').$limit;
 	}

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

 	/**
 	 * Close DB Connection
 	 *
 	 * @param	resource
 	 * @return	void
 	 */
 	protected function _close($conn_id)
 	{
 		@cubrid_close($conn_id);
 	}

 }

 /* End of file cubrid_driver.php */
 /* Location: ./system/database/drivers/cubrid/cubrid_driver.php */
	<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
	/**
	* CodeIgniter
	*
	* An open source application development framework for PHP 5.1.6 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 2.0.2
	* @filesource
	*/

	/**
	* CUBRID Database Adapter Class
	*
	* Note: _DB is an extender class that the app controller
	* creates dynamically based on whether the active record
	* class is being used or not.
	*
	* @package CodeIgniter
	* @subpackage Drivers
	* @category Database
	* @author Esen Sagynov
	* @link http://codeigniter.com/user_guide/database/
	*/
	class CI_DB_cubrid_driver extends CI_DB {

	public $dbdriver = 'cubrid';

	// The character used for escaping - no need in CUBRID
	protected $_escape_char = '';

	// clause and character used for LIKE escape sequences - not used in CUBRID
	protected $_like_escape_str = '';
	protected $_like_escape_chr = '';

	/**
	* The syntax to count rows is slightly different across different
	* database engines, so this string appears in each driver and is
	* used for the count_all() and count_all_results() functions.
	*/
	protected $_count_string = 'SELECT COUNT(*) AS ';
	protected $_random_keyword = ' RAND()'; // database specific random keyword

	// CUBRID-specific properties
	public $auto_commit = TRUE;

	public function __construct($params)
	{
	parent::__construct($params);

	if (preg_match('/^CUBRID:[^:]+(:[0-9][1-9]{0,4})?:[^:]+:[^:]:[^:]:(\?.+)?$/', $this->dsn, $matches))
	{
	preg_match('/autocommit=on/', $matches[2], $matches) OR $this->auto_commit = FALSE;
	}
	else
	{
	// If no port is defined by the user, use the default value
	$this->port == '' OR $this->port = 33000;
	}
	}

	/**
	* Non-persistent database connection
	*
	* @return resource
	*/
	public function db_connect()
	{
	return $this->_cubrid_connect();
	}

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

	/**
	* Persistent database connection
	*
	* In CUBRID persistent DB connection is supported natively in CUBRID
	* engine which can be configured in the CUBRID Broker configuration
	* file by setting the CCI_PCONNECT parameter to ON. In that case, all
	* connections established between the client application and the
	* server will become persistent.
	*
	* @return resource
	*/
	public function db_pconnect()
	{
	return $this->_cubrid_connect(TRUE);
	}

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

	/**
	* CUBRID connection
	*
	* A CUBRID-specific method to create a connection to the database.
	* Except for determining if a persistent connection should be used,
	* the rest of the logic is the same for db_connect() and db_pconnect().
	*
	* @param bool
	* @return resource
	*/
	protected function _cubrid_connect($persistent = FALSE)
	{
	if (preg_match('/^CUBRID:[^:]+(:[0-9][1-9]{0,4})?:[^:]+:([^:]):([^:]):(\?.+)?$/', $this->dsn, $matches))
	{
	$conn_id = ($matches[2] === '' && $matches[3] === '' && $this->username !== '' && $this->password !== '')
	? cubrid_connect_with_url($this->dsn, $this->username, $this->password)
	: cubrid_connect_with_url($this->dsn);
	}
	else
	{
	$_temp = ($persistent !== TRUE) ? 'cubrid_connect' : 'cubrid_pconnect';
	$conn_id = ($this->username !== '')
	? $_temp($this->hostname, $this->port, $this->database, $this->username, $this->password)
	: $_temp($this->hostname, $this->port, $this->database);
	}

	if ($conn_id)
	{
	$_temp = ($this->auto_commit) ? CUBRID_AUTOCOMMIT_TRUE : CUBRID_AUTOCOMMIT_FALSE;
	cubrid_set_autocommit($conn_id, $_temp);
	}

	return $conn_id;
	}

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

	/**
	* Reconnect
	*
	* Keep / reestablish the db connection if no queries have been
	* sent for a length of time exceeding the server's idle timeout
	*
	* @return void
	*/
	public function reconnect()
	{
	if (cubrid_ping($this->conn_id) === FALSE)
	{
	$this->conn_id = FALSE;
	}
	}

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

	/**
	* Select the database
	*
	* @return resource
	*/
	public function db_select()
	{
	// In CUBRID there is no need to select a database as the database
	// is chosen at the connection time.
	// So, to determine if the database is "selected", all we have to
	// do is ping the server and return that value.
	return cubrid_ping($this->conn_id);
	}

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

	/**
	* Set client character set
	*
	* @param string
	* @param string
	* @return bool
	*/
	public function db_set_charset($charset, $collation)
	{
	// Not supported in CUBRID
	return TRUE;
	}

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

	/**
	* Version number query string
	*
	* @return string
	*/
	protected function _version()
	{
	return cubrid_get_server_info($this->conn_id);
	}

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

	/**
	* Execute the query
	*
	* @param string an SQL query
	* @return resource
	*/
	protected function _execute($sql)
	{
	return @cubrid_query($this->_prep_query($sql), $this->conn_id);
	}

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

	/**
	* Prep the query
	*
	* If needed, each database adapter can prep the query string
	*
	* @param string an SQL query
	* @return string
	*/
	protected function _prep_query($sql)
	{
	return $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);

	if (cubrid_get_autocommit($this->conn_id))
	{
	cubrid_set_autocommit($this->conn_id, CUBRID_AUTOCOMMIT_FALSE);
	}

	return TRUE;
	}

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

	/**
	* 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;
	}

	cubrid_commit($this->conn_id);

	if ($this->auto_commit && ! cubrid_get_autocommit($this->conn_id))
	{
	cubrid_set_autocommit($this->conn_id, CUBRID_AUTOCOMMIT_TRUE);
	}

	return TRUE;
	}

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

	/**
	* 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;
	}

	cubrid_rollback($this->conn_id);

	if ($this->auto_commit && ! cubrid_get_autocommit($this->conn_id))
	{
	cubrid_set_autocommit($this->conn_id, CUBRID_AUTOCOMMIT_TRUE);
	}

	return TRUE;
	}

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

	/**
	* 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;
	}

	if (function_exists('cubrid_real_escape_string') && is_resource($this->conn_id))
	{
	$str = cubrid_real_escape_string($str, $this->conn_id);
	}
	else
	{
	$str = addslashes($str);
	}

	// escape LIKE condition wildcards
	if ($like === TRUE)
	{
	return str_replace(array('%', '_'), array('\\%', '\\_'), $str);
	}

	return $str;
	}

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

	/**
	* Affected Rows
	*
	* @return int
	*/
	public function affected_rows()
	{
	return @cubrid_affected_rows($this->conn_id);
	}

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

	/**
	* Insert ID
	*
	* @return int
	*/
	public function insert_id()
	{
	return @cubrid_insert_id($this->conn_id);
	}

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

	/**
	* "Count All" query
	*
	* Generates a platform-specific query string that counts all records in
	* the specified table
	*
	* @param string
	* @return int
	*/
	public function count_all($table = '')
	{
	if ($table == '')
	{
	return 0;
	}
	$query = $this->query($this->_count_string.$this->_protect_identifiers('numrows').' FROM '.$this->_protect_identifiers($table, TRUE, NULL, FALSE));
	if ($query->num_rows() == 0)
	{
	return 0;
	}

	$query = $query->row();
	$this->_reset_select();
	return (int) $query->numrows;
	}

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

	/**
	* List table query
	*
	* Generates a platform-specific query string so that the table names can be fetched
	*
	* @param bool
	* @return string
	*/
	protected function _list_tables($prefix_limit = FALSE)
	{
	$sql = 'SHOW TABLES';

	if ($prefix_limit !== FALSE && $this->dbprefix != '')
	{
	return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";
	}

	return $sql;
	}

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

	/**
	* Show column query
	*
	* Generates a platform-specific query string so that the column names can be fetched
	*
	* @param string the table name
	* @return string
	*/
	protected function _list_columns($table = '')
	{
	return 'SHOW COLUMNS FROM '.$this->_protect_identifiers($table, TRUE, NULL, FALSE);
	}

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

	/**
	* 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($table)
	{
	return 'SELECT * FROM '.$table.' LIMIT 1';
	}

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

	/**
	* The error message string
	*
	* @return string
	*/
	protected function _error_message()
	{
	return cubrid_error($this->conn_id);
	}

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

	/**
	* The error message number
	*
	* @return int
	*/
	protected function _error_number()
	{
	return cubrid_errno($this->conn_id);
	}

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

	/**
	* Escape the SQL Identifiers
	*
	* This function escapes column and table names
	*
	* @param string
	* @return string
	*/
	public function _escape_identifiers($item)
	{
	if ($this->_escape_char == '')
	{
	return $item;
	}

	foreach ($this->_reserved_identifiers as $id)
	{
	if (strpos($item, '.'.$id) !== FALSE)
	{
	$item = str_replace('.', $this->_escape_char.'.', $item);

	// remove duplicates if the user already included the escape
	return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item);
	}
	}

	if (strpos($item, '.') !== FALSE)
	{
	$item = str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
	}

	// remove duplicates if the user already included the escape
	return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item.$this->_escape_char);
	}

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

	/**
	* From Tables
	*
	* This function implicitly groups FROM tables so there is no confusion
	* about operator precedence in harmony with SQL standards
	*
	* @param string the table name
	* @return string
	*/
	protected function _from_tables($tables)
	{
	if ( ! is_array($tables))
	{
	$tables = array($tables);
	}

	return '('.implode(', ', $tables).')';
	}

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

	/**
	* Insert statement
	*
	* Generates a platform-specific insert string from the supplied data
	*
	* @param string the table name
	* @param array the insert keys
	* @param array the insert values
	* @return string
	*/
	protected function _insert($table, $keys, $values)
	{
	return 'INSERT INTO '.$table.' ("'.implode('", "', $keys).'") VALUES ('.implode(', ', $values).')';
	}

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


	/**
	* Replace statement
	*
	* Generates a platform-specific replace string from the supplied data
	*
	* @param string the table name
	* @param array the insert keys
	* @param array the insert values
	* @return string
	*/
	protected function _replace($table, $keys, $values)
	{
	return 'REPLACE INTO '.$table.' ("'.implode('", "', $keys).'") VALUES ('.implode(', ', $values).')';
	}

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

	/**
	* Insert_batch statement
	*
	* Generates a platform-specific insert string from the supplied data
	*
	* @param string the table name
	* @param array the insert keys
	* @param array the insert values
	* @return string
	*/
	protected function _insert_batch($table, $keys, $values)
	{
	return 'INSERT INTO '.$table.' ("'.implode('", "', $keys).'") VALUES '.implode(', ', $values);
	}

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

	/**
	* Update statement
	*
	* Generates a platform-specific update string from the supplied data
	*
	* @param string the table name
	* @param array the update data
	* @param array the where clause
	* @param array the orderby clause
	* @param array the limit clause
	* @return string
	*/
	protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
	{
	foreach ($values as $key => $val)
	{
	$valstr[] = sprintf('"%s" = %s', $key, $val);
	}

	return 'UPDATE '.$table.' SET '.implode(', ', $valstr)
	.(($where != '' && count($where) > 0) ? ' WHERE '.implode(' ', $where) : '')
	.(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
	.( ! $limit ? '' : ' LIMIT '.$limit);
	}

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


	/**
	* 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)
	{
	$ids = array();
	foreach ($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"
	.implode("\n", $v)
	.'ELSE '.$k.' END, ';
	}

	return 'UPDATE '.$table.' SET '.substr($cases, 0, -2)
	.' WHERE '.(($where != '' && count($where) > 0) ? implode(' ', $where).' AND ' : '')
	.$index.' IN ('.implode(',', $ids).')';
	}

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

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

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

	/**
	* Delete statement
	*
	* Generates a platform-specific delete string from the supplied data
	*
	* @param string the table name
	* @param array the where clause
	* @param string the limit clause
	* @return string
	*/
	protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
	{
	$conditions = '';

	if (count($where) > 0 OR count($like) > 0)
	{
	$conditions = "\nWHERE ".implode("\n", $where)
	.((count($where) > 0 && count($like) > 0) ? ' AND ' : '')
	.implode("\n", $like);
	}

	return 'DELETE FROM '.$table.$conditions.( ! $limit ? '' : ' LIMIT '.$limit);
	}

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

	/**
	* Limit string
	*
	* Generates a platform-specific LIMIT clause
	*
	* @param string the sql query string
	* @param int the number of rows to limit the query to
	* @param int the offset value
	* @return string
	*/
	protected function _limit($sql, $limit, $offset)
	{
	return $sql.'LIMIT '.($offset == 0 ? '' : $offset.', ').$limit;
	}

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

	/**
	* Close DB Connection
	*
	* @param resource
	* @return void
	*/
	protected function _close($conn_id)
	{
	@cubrid_close($conn_id);
	}

	}

	/* End of file cubrid_driver.php */
	/* Location: ./system/database/drivers/cubrid/cubrid_driver.php */