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<?php
/**
* 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 1.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* Oracle Forge Class
*
* @category Database
* @author EllisLab Dev Team
* @link http://codeigniter.com/user_guide/database/
*/
class CI_DB_oci8_forge extends CI_DB_forge {
/**
* CREATE DATABASE statement
*
* @var string
*/
protected $_create_database = FALSE;
/**
* DROP DATABASE statement
*
* @var string
*/
protected $_drop_database = FALSE;
/**
* DROP TABLE IF statement
*
* @var string
*/
protected $_drop_table_if = FALSE;
/**
* UNSIGNED support
*
* @var bool|array
*/
protected $_unsigned = FALSE;
// --------------------------------------------------------------------
/**
* ALTER TABLE
*
* @param string $alter_type ALTER type
* @param string $table Table name
* @param mixed $field Column definition
* @return string|string[]
*/
protected function _alter_table($alter_type, $table, $field)
{
if ($alter_type === 'DROP')
{
return parent::_alter_table($alter_type, $table, $field);
}
elseif ($alter_type === 'CHANGE')
{
$alter_type = 'MODIFY';
}
$sql = 'ALTER TABLE '.$this->db->escape_identifiers($table);
$sqls = array();
for ($i = 0, $c = count($field); $i < $c; $i++)
{
if ($field[$i]['_literal'] !== FALSE)
{
$field[$i] = "\n\t".$field[$i]['_literal'];
}
else
{
$field[$i]['_literal'] = "\n\t".$this->_process_column($field[$i]);
if ($alter_type === 'MODIFY' && ! empty($field[$i]['new_name']))
{
$sqls[] = $sql.' RENAME COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
.' '.$this->db->escape_identifiers($field[$i]['new_name']);
}
}
}
$sql .= ' '.$alter_type.' ';
$sql .= (count($field) === 1)
? $field[0]
: '('.implode(',', $field).')';
// RENAME COLUMN must be executed after MODIFY
array_unshift($sqls, $sql);
return $sql;
}
// --------------------------------------------------------------------
/**
* Field attribute AUTO_INCREMENT
*
* @param array &$attributes
* @param array &$field
* @return void
*/
protected function _attr_auto_increment(&$attributes, &$field)
{
// Not supported - sequences and triggers must be used instead
}
}
/* End of file oci8_forge.php */
/* Location: ./system/database/drivers/oci8/oci8_forge.php */
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