<?php
/**
 * Copyright since 2007 PrestaShop SA and Contributors
 * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
 *
 * 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.md.
 * It is also available through the world-wide-web at this URL:
 * https://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 license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to https://devdocs.prestashop.com/ for more information.
 *
 * @author    PrestaShop SA and Contributors <contact@prestashop.com>
 * @copyright Since 2007 PrestaShop SA and Contributors
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 */

function add_missing_image_key()
{
    $res = true;
    $key_exists = Db::getInstance()->executeS('SHOW INDEX
		FROM `'._DB_PREFIX_.'image`
		WHERE Key_name = \'idx_product_image\'');
    if ($key_exists) {
        $res &= Db::getInstance()->execute('ALTER TABLE
		`'._DB_PREFIX_.'image`
		DROP KEY `idx_product_image`');
    }
    $res &= Db::getInstance()->execute('ALTER TABLE
	`'._DB_PREFIX_.'image`
	ADD UNIQUE `idx_product_image` (`id_image`, `id_product`, `cover`)');

    return $res;
}