From ed0341e82fb3cd678341f4d8c41db0441cf0f7fa Mon Sep 17 00:00:00 2001
From: Sam Minnee <sam@silverstripe.com>
Date: Thu, 23 Aug 2012 12:35:20 +1200
Subject: [PATCH] BUGFIX: Ensure that subtracting a sorted DataList works.

---
 model/DataQuery.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/model/DataQuery.php b/model/DataQuery.php
index 2445df599..625dbe502 100644
--- a/model/DataQuery.php
+++ b/model/DataQuery.php
@@ -656,6 +656,7 @@ function max($field) {
 		$fieldExpression = $this->expressionForField($field, $subSelect);
 		$subSelect->setSelect(array());
 		$subSelect->selectField($fieldExpression, $field);
+		$subSelect->setOrderBy(null);
 		$this->where($this->expressionForField($field, $this).' NOT IN ('.$subSelect->sql().')');
 
 		return $this;