<?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);
}
}