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<?php
/**
* TPgsqlMetaData class file.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2007 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id$
* @package System.Data.ActiveRecord.Vendor
*/
Prado::using('System.Data.ActiveRecord.Vendor.TDbMetaDataCommon');
/**
* TPgsqlMetaData class.
*
* Command builder for Postgres database
*
* @author Wei Zhuo <weizho[at]gmail[dot]com>
* @version $Id$
* @package System.Data.ActiveRecord.Vendor
* @since 3.1
*/
class TPgsqlMetaData extends TDbMetaDataCommon
{
/**
* Build the SQL search string from the criteria object for Postgress database.
* @param TDbConnection database connection.
* @param TActiveRecordCriteria search criteria.
* @return string SQL search.
*/
protected function getSqlFromCriteria($conn, TActiveRecordCriteria $criteria)
{
$sql = '';
if(($condition = $criteria->getCondition())!==null)
$sql .= $condition;
$orders=array();
foreach($criteria->getOrdersBy() as $by=>$ordering)
$orders[] = $conn->quoteString($by).' '.$this->getOrdering($ordering);
if(count($orders) > 0)
$sql .= ' ORDER BY '.implode(', ', $orders);
if(($limit = $criteria->getLimit())!==null)
$sql .= ' LIMIT '.intval($limit); //assumes integer limit?
if(($offset = $criteria->getOffset())!==null)
$sql .= ' OFFSET '.intval($offset); //assumes integer offset?
return strlen($sql) > 0 ? ' WHERE '.$sql : '';
}
private function getOrdering($direction)
{
if(strtolower($direction) == 'desc')
return 'DESC';
else
return 'ASC';
}
}
?>
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