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✏️ Editing: cubrid_driver.php

<?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');

/**
 * CUBRID 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		Esen Sagynov
 * @link		http://codeigniter.com/user_guide/database/
 */
class CI_DB_cubrid_driver extends CI_DB {

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

/**
	 * Auto-commit flag
	 *
	 * @var	bool
	 */
	public $auto_commit = TRUE;

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

/**
	 * Identifier escape character
	 *
	 * @var	string
	 */
	protected $_escape_char = '`';

/**
	 * ORDER BY random keyword
	 *
	 * @var	array
	 */
	protected $_random_keyword = array('RANDOM()', 'RANDOM(%d)');

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

/**
	 * Class constructor
	 *
	 * @param	array	$params
	 * @return	void
	 */
	public function __construct($params)
	{
		parent::__construct($params);

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

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

/**
	 * Non-persistent database connection
	 *
	 * @param	bool	$persistent
	 * @return	resource
	 */
	public function db_connect($persistent = FALSE)
	{
		if (preg_match('/^CUBRID:[^:]+(:[0-9][1-9]{0,4})?:[^:]+:([^:]*):([^:]*):(\?.+)?$/', $this->dsn, $matches))
		{
			$func = ($persistent !== TRUE) ? 'cubrid_connect_with_url' : 'cubrid_pconnect_with_url';
			return ($matches[2] === '' && $matches[3] === '' && $this->username !== '' && $this->password !== '')
				? $func($this->dsn, $this->username, $this->password)
				: $func($this->dsn);
		}

$func = ($persistent !== TRUE) ? 'cubrid_connect' : 'cubrid_pconnect';
		return ($this->username !== '')
			? $func($this->hostname, $this->port, $this->database, $this->username, $this->password)
			: $func($this->hostname, $this->port, $this->database);
	}

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

/**
	 * 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;
		}
	}

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

/**
	 * Database version number
	 *
	 * @return	string
	 */
	public function version()
	{
		if (isset($this->data_cache['version']))
		{
			return $this->data_cache['version'];
		}

return ( ! $this->conn_id OR ($version = cubrid_get_server_info($this->conn_id)) === FALSE)
			? FALSE
			: $this->data_cache['version'] = $version;
	}

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

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

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

/**
	 * 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);

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;
	}

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

/**
	 * Platform-dependant string escape
	 *
	 * @param	string
	 * @return	string
	 */
	protected function _escape_str($str)
	{
		return cubrid_real_escape_string($str, $this->conn_id);
	}

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

/**
	 * Affected Rows
	 *
	 * @return	int
	 */
	public function affected_rows()
	{
		return cubrid_affected_rows();
	}

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

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

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

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

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

/**
	 * Returns an object with field data
	 *
	 * @param	string	$table
	 * @return	array
	 */
	public function field_data($table)
	{
		if (($query = $this->query('SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE))) === FALSE)
		{
			return FALSE;
		}
		$query = $query->result_object();

$retval = array();
		for ($i = 0, $c = count($query); $i < $c; $i++)
		{
			$retval[$i]			= new stdClass();
			$retval[$i]->name		= $query[$i]->Field;

sscanf($query[$i]->Type, '%[a-z](%d)',
				$retval[$i]->type,
				$retval[$i]->max_length
			);

$retval[$i]->default		= $query[$i]->Default;
			$retval[$i]->primary_key	= (int) ($query[$i]->Key === 'PRI');
		}

return $retval;
	}

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

/**
	 * Error
	 *
	 * Returns an array containing code and message of the last
	 * database error that has occured.
	 *
	 * @return	array
	 */
	public function error()
	{
		return array('code' => cubrid_errno($this->conn_id), 'message' => cubrid_error($this->conn_id));
	}

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

/**
	 * FROM tables
	 *
	 * Groups tables in FROM clauses if needed, so there is no confusion
	 * about operator precedence.
	 *
	 * @return	string
	 */
	protected function _from_tables()
	{
		if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
		{
			return '('.implode(', ', $this->qb_from).')';
		}

return implode(', ', $this->qb_from);
	}

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

/**
	 * Close DB Connection
	 *
	 * @return	void
	 */
	protected function _close()
	{
		cubrid_close($this->conn_id);
	}

}

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