app/code/core/Mage/Bundle/sql/bundle_setup/mysql4-upgrade-0.1.0-0.1.1.php

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<?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@magentocommerce.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.magentocommerce.com for more information.
 *
 * @category   Mage
 * @package    Mage_Bundle
 * @copyright  Copyright (c) 2008 Irubin Consulting Inc. DBA Varien (http://www.varien.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();

$installer->run("
ALTER TABLE {$this->getTable('catalog_product_bundle_option')}
    ADD CONSTRAINT `FK_CATALOG_PRODUCT_BUNDLE_OPTION_PARENT` FOREIGN KEY (`parent_id`)
    REFERENCES {$this->getTable('catalog_product_entity')} (`entity_id`)
        ON DELETE CASCADE
        ON UPDATE CASCADE;
ALTER TABLE {$this->getTable('catalog_product_bundle_option_value')}
    ADD CONSTRAINT `FK_CATALOG_PRODUCT_BUNDLE_OPTION_VALUE_OPTION` FOREIGN KEY (`option_id`)
    REFERENCES {$this->getTable('catalog_product_bundle_option')} (`option_id`)
        ON DELETE CASCADE
        ON UPDATE CASCADE;
ALTER TABLE {$this->getTable('catalog_product_bundle_selection')}
    ADD CONSTRAINT `FK_CATALOG_PRODUCT_BUNDLE_SELECTION_OPTION` FOREIGN KEY (`option_id`)
    REFERENCES {$this->getTable('catalog_product_bundle_option')} (`option_id`)
        ON DELETE CASCADE
        ON UPDATE CASCADE,
    ADD CONSTRAINT `FK_CATALOG_PRODUCT_BUNDLE_SELECTION_PRODUCT` FOREIGN KEY (`product_id`)
    REFERENCES {$this->getTable('catalog_product_entity')} (`entity_id`)
        ON DELETE CASCADE
        ON UPDATE CASCADE;
");

$installer->endSetup();

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