app/code/core/Mage/CatalogSearch/Model/Mysql4/Query.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_CatalogSearch
 * @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)
 */

/**
 * Catalog search query resource model
 *
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_CatalogSearch_Model_Mysql4_Query extends Mage_Core_Model_Mysql4_Abstract
{
    /**
     * Init resource data
     *
     */
    protected function _construct()
    {
        $this->_init('catalogsearch/search_query', 'query_id');
    }

    /**
     * Retrieve select object for load object data
     *
     * @param   string $field
     * @param   mixed $value
     * @return  Zend_Db_Select
     */
    protected function _getLoadSelect($field, $value, $object)
    {
        $select = $this->_getReadAdapter()->select()
            ->from($this->getMainTable())
            ->where($this->getMainTable().'.'.$field.'=?', $value);
        return $select;
    }

    /**
     * Custom load model by search query string
     *
     * @param Mage_Core_Model_Abstract $object
     * @param string $value
     * @return Mage_CatalogSearch_Model_Mysql4_Query
     */
    public function loadByQuery(Mage_Core_Model_Abstract $object, $value)
    {
        $select = $this->_getReadAdapter()->select()
            ->from($this->getMainTable())
            ->where('query_text=:query_text')
            ->where('store_id=:store_id');
        $bind = array(
            ':query_text' => $value,
            ':store_id'   => $object->getStoreId()
        );
        if ($data = $this->_getReadAdapter()->fetchRow($select, $bind)) {
            $object->setData($data);
            $this->_afterLoad($object);
        }

        return $this;
    }

    public function load(Mage_Core_Model_Abstract $object, $value, $field=null)
    {
        if (is_numeric($value)) {
            return parent::load($object, $value);
        }
        else {
            $this->loadByQuery($object,$value);
        }
        return $this;
    }

    public function _beforeSave(Mage_Core_Model_Abstract $object)
    {
        $object->setUpdatedAt($this->formatDate(Mage::getModel('core/date')->gmtTimestamp()));
        return $this;
    }
}

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