<?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 2.1.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * PDO CUBRID Forge Class
 *
 * @category	Database
 * @author		EllisLab Dev Team
 * @link		http://codeigniter.com/user_guide/database/
 */
class CI_DB_pdo_cubrid_forge extends CI_DB_pdo_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	= 'DROP TABLE IF EXISTS';

	/**
	 * UNSIGNED support
	 *
	 * @var	array
	 */
	protected $_unsigned		= array(
		'SHORT'		=> 'INTEGER',
		'SMALLINT'	=> 'INTEGER',
		'INT'		=> 'BIGINT',
		'INTEGER'	=> 'BIGINT',
		'BIGINT'	=> 'NUMERIC',
		'FLOAT'		=> 'DOUBLE',
		'REAL'		=> 'DOUBLE'
	);

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

	/**
	 * 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, $field)
	{
		if (in_array($alter_type, array('DROP', 'ADD'), TRUE))
		{
			return parent::_alter_table($alter_type, $table, $field);
		}

		$sql = 'ALTER TABLE '.$this->db->escape_identifiers($table);
		$sqls = array();
		for ($i = 0, $c = count($field); $i < $c; $i++)
		{
			if ($field[$i]['_literal'] !== FALSE)
			{
				$sqls[] = $sql.' CHANGE '.$field[$i]['_literal'];
			}
			else
			{
				$sqls[] = $sql.' CHANGE '.$this->_process_column($field[$i]);
				if ( ! empty($field[$i]['new_name']))
				{
					$sqls[] = $sql.' RENAME COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
						.' AS '.$this->db->escape_identifiers($field[$i]['name']);
				}
			}
		}

		return $sqls;
	}

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

	/**
	 * Field attribute TYPE
	 *
	 * Performs a data type mapping between different databases.
	 *
	 * @param	array	&$attributes
	 * @return	void
	 */
	protected function _attr_type(&$attributes)
	{
		switch (strtoupper($attributes['TYPE']))
		{
			case 'TINYINT':
				$attributes['TYPE'] = 'SMALLINT';
				$attributes['UNSIGNED'] = FALSE;
				return;
			case 'MEDIUMINT':
				$attributes['TYPE'] = 'INTEGER';
				$attributes['UNSIGNED'] = FALSE;
				return;
			default: return;
		}
	}

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

	/**
	 * Process indexes
	 *
	 * @param	string	$table	(ignored)
	 * @return	string
	 */
	protected function _process_indexes($table = NULL)
	{
		$sql = '';

		for ($i = 0, $c = count($this->keys); $i < $c; $i++)
		{
			if ( ! isset($this->fields[$this->keys[$i]]))
			{
				unset($this->keys[$i]);
				continue;
			}

			is_array($this->keys[$i]) OR $this->keys[$i] = array($this->keys[$i]);

			$sql .= ",\n\tKEY ".$this->db->escape_identifiers(implode('_', $this->keys[$i]))
				.' ('.implode(', ', $this->db->escape_identifiers($this->keys[$i])).')';
		}

		$this->keys = array();

		return $sql;
	}

}

/* End of file pdo_cubrid_forge.php */
/* Location: ./system/database/drivers/pdo/subdrivers/pdo_cubrid_forge.php */