<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * 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 license@magento.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magento.com for more information.
 *
 * @category    Mage
 * @package     Mage_Core
 * @copyright  Copyright (c) 2006-2017 X.commerce, Inc. and affiliates (http://www.magento.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

$installer = $this;
/* @var $installer Mage_Core_Model_Resource_Setup */

$installer->startSetup();

$installer->getConnection()->addColumn($this->getTable('core/url_rewrite'), 'entity_id', 'INT( 10 ) NOT NULL AFTER `store_id`');
$installer->run("UPDATE {$this->getTable('core/url_rewrite')} set `entity_id` = SUBSTR(`id_path`, LOCATE('/', `id_path`)+1, IF(LOCATE('/', `id_path`, LOCATE('/', `id_path`)+1) = 0, LENGTH(`id_path`) , LOCATE('/', `id_path`, LOCATE('/', `id_path`)+1)) - LOCATE('/', `id_path`)+1);");

$installer->endSetup();