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<?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 3.0.0
* @filesource
*/
/**
* PDO 4D 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_4d_driver extends CI_DB_pdo_driver {
public $subdriver = '4d';
// The character used for escaping
protected $_escape_char = array('[', ']');
protected $_random_keyword = ' RAND()';
/**
* Constructor
*
* Builds the DSN if not already set.
*
* @param array
* @return void
*/
public function __construct($params)
{
parent::__construct($params);
if (empty($this->dsn))
{
$this->dsn = '4D:host='.(empty($this->hostname) ? 'localhost' : $this->hostname);
empty($this->port) OR $this->dsn .= ';port='.$this->port;
empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
}
elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 3) === FALSE)
{
$this->dsn .= ';charset='.$this->char_set;
}
}
// --------------------------------------------------------------------
/**
* Show 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)
{
$sql = 'SELECT '.$this->escape_identifiers('TABLE_NAME').' FROM '.$this->escape_identifiers('_USER_TABLES');
if ($prefix_limit === TRUE && $this->dbprefix !== '')
{
$sql .= ' WHERE '.$this->escape_identifiers('TABLE_NAME')." LIKE '".$this->escape_like_str($this->dbprefix)."%' "
.sprintf($this->_like_escape_str, $this->_like_escape_chr);
}
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 'SELECT '.$this->escape_identifiers('COLUMN_NAME').' FROM '.$this->escape_identifiers('_USER_COLUMNS')
.' WHERE '.$this->escape_identifiers('TABLE_NAME').' = '.$this->escape($table);
}
// --------------------------------------------------------------------
/**
* Field data query
*
* Generates a platform-specific query so that the column data can be retrieved
*
* @param string the table name
* @return string
*/
protected function _field_data($table)
{
return 'SELECT * FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE).' LIMIT 1';
}
// --------------------------------------------------------------------
/**
* From Tables
*
* This function implicitly groups FROM tables so there is no confusion
* about operator precedence in harmony with SQL standards
*
* @param array
* @return string
*/
protected function _from_tables($tables)
{
return is_array($tables) ? implode(', ', $tables) : $tables;
}
// --------------------------------------------------------------------
/**
* Update statement
*
* Generates a platform-specific update string from the supplied data
*
* @param string the table name
* @param array the update data
* @param array the where clause
* @param array the orderby clause (ignored)
* @param array the limit clause (ignored)
* @param array the like clause
* @return string
*/
protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
{
foreach ($values as $key => $val)
{
$valstr[] = $key.' = '.$val;
}
$where = empty($where) ? '' : ' WHERE '.implode(' ', $where);
if ( ! empty($like))
{
$where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like);
}
return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where;
}
// --------------------------------------------------------------------
/**
* Delete statement
*
* Generates a platform-specific delete string from the supplied data
*
* @param string the table name
* @param array the where clause
* @param array the like clause
* @param string the limit clause (ignored)
* @return string
*/
protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
{
$conditions = array();
empty($where) OR $conditions[] = implode(' ', $where);
empty($like) OR $conditions[] = implode(' ', $like);
$conditions = (count($conditions) > 0) ? ' WHERE '.implode(' AND ', $conditions) : '';
return 'DELETE FROM '.$table.$conditions;
}
// --------------------------------------------------------------------
/**
* Limit string
*
* Generates a platform-specific LIMIT clause
*
* @param string the sql query string
* @param int the number of rows to limit the query to
* @param int the offset value
* @return string
*/
protected function _limit($sql, $limit, $offset)
{
return $sql.' LIMIT '.$limit.($offset ? ' OFFSET '.$offset : '');
}
}
/* End of file pdo_4d_driver.php */
/* Location: ./system/database/drivers/pdo/subdrivers/pdo_4d_driver.php */
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