From a14ec86bfd2b9ab659465d79bee54be3bab8bcd4 Mon Sep 17 00:00:00 2001
From: Nicholas Hoobin <nicholashoobin@catalyst-au.net>
Date: Tue, 3 May 2016 14:25:51 +1000
Subject: [PATCH] MDL-53788 mod_lti: fix aggressive course cache rebuilding

---
 mod/lti/locallib.php | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/mod/lti/locallib.php b/mod/lti/locallib.php
index 75d2bc5e975..f79a8d79e46 100644
--- a/mod/lti/locallib.php
+++ b/mod/lti/locallib.php
@@ -1438,7 +1438,15 @@ function lti_update_type($type, $config) {
         }
         require_once($CFG->libdir.'/modinfolib.php');
         if ($clearcache) {
-            rebuild_course_cache();
+            $sql = "SELECT DISTINCT course
+                      FROM {lti}
+                     WHERE typeid = ?";
+
+            $courses = $DB->get_fieldset_sql($sql, array($type->id));
+
+            foreach ($courses as $courseid) {
+                rebuild_course_cache($courseid, true);
+            }
         }
     }
 }