<?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_Sales
 * @copyright  Copyright (c) 2006-2016 X.commerce, Inc. and affiliates (http://www.magento.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

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

$subSelect = $installer->getConnection()->select()
    ->from(
        array('citem' => $installer->getTable('sales/creditmemo_item')),
        array(
             'amount_refunded'        => 'SUM(citem.row_total)',
             'base_amount_refunded'   => 'SUM(citem.base_row_total)',
             'base_tax_refunded'      => 'SUM(citem.base_tax_amount)',
             'discount_refunded'      => 'SUM(citem.discount_amount)',
             'base_discount_refunded' => 'SUM(citem.base_discount_amount)',
        )
    )
    ->joinLeft(
        array('c' => $installer->getTable('sales/creditmemo')),
        'c.entity_id = citem.parent_id',
        array()
    )
    ->joinLeft(
        array('o' => $installer->getTable('sales/order')),
        'o.entity_id = c.order_id',
        array()
    )
    ->joinLeft(
        array('oitem' => $installer->getTable('sales/order_item')),
        'oitem.order_id = o.entity_id AND oitem.product_id=citem.product_id',
        array('item_id')
    )
    ->group('oitem.item_id');

$select = $installer->getConnection()->select()
    ->from(
        array('selected' => $subSelect),
        array(
            'amount_refunded'        => 'amount_refunded',
            'base_amount_refunded'   => 'base_amount_refunded',
            'base_tax_refunded'      => 'base_tax_refunded',
            'discount_refunded'      => 'discount_refunded',
            'base_discount_refunded' => 'base_discount_refunded',
        )
    )
    ->where('main.item_id = selected.item_id');

$updateQuery = $installer->getConnection()->updateFromSelect(
    $select,
    array('main' => $installer->getTable('sales/order_item'))
);

$installer->getConnection()->query($updateQuery);