From b095ee9f3aa8662a016e55c9cdd7d7abce6a4b72 Mon Sep 17 00:00:00 2001
From: Matt Petro <petro@engr.wisc.edu>
Date: Thu, 6 Feb 2014 13:32:04 -0500
Subject: [PATCH] MDL-44029 mod_quiz: Fixing group deleted handler so it does
 not remove user overrides.

---
 mod/quiz/locallib.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mod/quiz/locallib.php b/mod/quiz/locallib.php
index 2a635cf1cbc..359a07db769 100644
--- a/mod/quiz/locallib.php
+++ b/mod/quiz/locallib.php
@@ -1638,7 +1638,9 @@ function quiz_groups_group_deleted_handler($event) {
               FROM {quiz_overrides} o
               JOIN {quiz} quiz ON quiz.id = o.quiz
          LEFT JOIN {groups} grp ON grp.id = o.groupid
-             WHERE quiz.course = :courseid AND grp.id IS NULL";
+             WHERE quiz.course = :courseid
+               AND o.groupid IS NOT NULL
+               AND grp.id IS NULL";
     $params = array('courseid'=>$event->courseid);
     $records = $DB->get_records_sql_menu($sql, $params);
     if (!$records) {