diff --git a/auth/db/auth.php b/auth/db/auth.php
index 8f60cc32ca9..931b4d26682 100644
--- a/auth/db/auth.php
+++ b/auth/db/auth.php
@@ -230,11 +230,11 @@ class auth_plugin_db extends auth_plugin_base {
             if (count($userlist)) {
                 list($notin_sql, $params) = $DB->get_in_or_equal($userlist, SQL_PARAMS_NAMED, 'u', false);
                 $params['authtype'] = $this->authtype;
-                $sql = "SELECT u.id, u.username, u.email, u.auth
+                $sql = "SELECT u.*
                           FROM {user} u
                          WHERE u.auth=:authtype AND u.deleted=0 AND u.username $notin_sql";
             } else {
-                $sql = "SELECT u.id, u.username, u.email, u.auth
+                $sql = "SELECT u.*
                           FROM {user} u
                          WHERE u.auth=:authtype AND u.deleted=0";
                 $params = array();
diff --git a/auth/ldap/auth.php b/auth/ldap/auth.php
index 447b6a69d7f..9f2f03c4991 100644
--- a/auth/ldap/auth.php
+++ b/auth/ldap/auth.php
@@ -689,7 +689,7 @@ class auth_plugin_ldap extends auth_plugin_base {
         // Find users in DB that aren't in ldap -- to be removed!
         // this is still not as scalable (but how often do we mass delete?)
         if ($this->config->removeuser !== AUTH_REMOVEUSER_KEEP) {
-            $sql = 'SELECT u.id, u.username, u.email, u.auth
+            $sql = 'SELECT u.*
                       FROM {user} u
                       LEFT JOIN {tmp_extuser} e ON (u.username = e.username AND u.mnethostid = e.mnethostid)
                      WHERE u.auth = ?
diff --git a/lib/cronlib.php b/lib/cronlib.php
index 9ccfc3004bd..dc944a4228d 100644
--- a/lib/cronlib.php
+++ b/lib/cronlib.php
@@ -219,7 +219,7 @@ function cron_run() {
 
         if (!empty($CFG->deleteincompleteusers)) {
             $cuttime = $timenow - ($CFG->deleteincompleteusers * 3600);
-            $rs = $DB->get_recordset_sql ("SELECT id, username
+            $rs = $DB->get_recordset_sql ("SELECT *
                                              FROM {user}
                                             WHERE confirmed = 1 AND lastaccess > 0
                                                   AND lastaccess < ? AND deleted = 0
diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 47e5a7b3433..6cf72369e32 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -3462,7 +3462,7 @@ function truncate_userinfo($info) {
  *
  * Any plugin that needs to purge user data should register the 'user_deleted' event.
  *
- * @param object $user User object before delete
+ * @param stdClass $user full user object before delete
  * @return boolean always true
  */
 function delete_user($user) {