From 4eebe5eb59eb9b2c14326a17d620cfb333e5eb71 Mon Sep 17 00:00:00 2001
From: mjollnir_ <mjollnir_>
Date: Tue, 23 Nov 2004 01:04:45 +0000
Subject: [PATCH] Fix for invalid sql (for postgres) in cron cleanup of
 duplicate enrolments. Possibly soon to be overridden by a unique index

---
 admin/cron.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/admin/cron.php b/admin/cron.php
index 574886e632d..b6e6a81b91d 100644
--- a/admin/cron.php
+++ b/admin/cron.php
@@ -103,9 +103,9 @@
         /// Delete duplicate enrolments (don't know what causes these yet - expired sessions?)
     
         if ($users = get_records_select("user_students", "userid > 0 GROUP BY course, userid ".
-                                        "HAVING count(*) > 1", "", "*,count(*)")) {
+                                        "HAVING count(*) > 1", "", "max(id) as id, userid, course ,count(*)")) {
             foreach ($users as $user) {
-               delete_records_select("user_students", "userid = '$user->userid' ".
+                delete_records_select("user_students", "userid = '$user->userid' ".
                                      "AND course = '$user->course' AND id <> '$user->id'");
             }
         }