diff --git a/system/database/DB_utility.php b/system/database/DB_utility.php
index 587dfdc..cb97ff4 100644
--- a/system/database/DB_utility.php
+++ b/system/database/DB_utility.php
@@ -212,7 +212,7 @@
 		$out = rtrim($out).$newline;
 
 		// Next blast through the result array and build out the rows
-		foreach ($query->result_array() as $row)
+		while ($row = $query->unbuffered_row('array'))
 		{
 			foreach ($row as $item)
 			{
@@ -258,7 +258,7 @@
 
 		// Generate the result
 		$xml = '<'.$root.'>'.$newline;
-		foreach ($query->result_array() as $row)
+		while ($row = $query->unbuffered_row())
 		{
 			$xml .= $tab.'<'.$element.'>'.$newline;
 			foreach ($row as $key => $val)
diff --git a/system/database/drivers/postgre/postgre_driver.php b/system/database/drivers/postgre/postgre_driver.php
index 0ddfd0a..30689cc 100644
--- a/system/database/drivers/postgre/postgre_driver.php
+++ b/system/database/drivers/postgre/postgre_driver.php
@@ -539,6 +539,47 @@
 	// --------------------------------------------------------------------
 
 	/**
+	 * Update_Batch statement
+	 *
+	 * Generates a platform-specific batch update string from the supplied data
+	 *
+	 * @param	string	the table name
+	 * @param	array	the update data
+	 * @param	array	the where clause
+	 * @return	string
+	 */
+	protected function _update_batch($table, $values, $index, $where = NULL)
+	{
+		$ids = array();
+		foreach ($values as $key => $val)
+		{
+			$ids[] = $val[$index];
+
+			foreach (array_keys($val) as $field)
+			{
+				if ($field != $index)
+				{
+					$final[$field][] =  'WHEN '.$val[$index].' THEN '.$val[$field];
+				}
+			}
+		}
+
+		$cases = '';
+		foreach ($final as $k => $v)
+		{
+			$cases .= $k.' = (CASE '.$k."\n"
+				.implode("\n", $v)."\n"
+				.'ELSE '.$k.' END), ';
+		}
+
+		return 'UPDATE '.$table.' SET '.substr($cases, 0, -2)
+			.' WHERE '.(($where != '' && count($where) > 0) ? implode(' ', $where).' AND ' : '')
+			.$index.' IN('.implode(',', $ids).')';
+	}
+
+	// --------------------------------------------------------------------
+
+	/**
 	 * Delete statement
 	 *
 	 * Generates a platform-specific delete string from the supplied data