Fix query see #1601

main/inc/lib/sessionmanager.lib.php

@@ -461,23 +461,24 @@ class SessionManager
         } else {
             $select =
                 "SELECT DISTINCT 
-                 s.name,
-                 s.display_start_date, 
-                 s.display_end_date, 
-                 access_start_date, 
-                 access_end_date, 
-                 s.visibility, 
-                 s.session_category_id, 
-                 $inject_extra_fields 
-                 s.id 
+                     s.name,
+                     s.display_start_date, 
+                     s.display_end_date, 
+                     access_start_date, 
+                     access_end_date, 
+                     s.visibility, 
+                     s.session_category_id, 
+                     $inject_extra_fields 
+                     s.id 
              ";
 
             $isMakingOrder = strpos($options['order'], 'category_name') === 0;
         }
 
         $isFilteringSessionCategory = strpos($where, 'category_name') !== false;
+        $isFilteringSessionCategoryWithName = strpos($where, 'sc.name') !== false;
 
-        if ($isMakingOrder || $isFilteringSessionCategory) {
+        if ($isMakingOrder || $isFilteringSessionCategory || $isFilteringSessionCategoryWithName) {
             $inject_joins .= " LEFT JOIN $sessionCategoryTable sc ON s.session_category_id = sc.id ";
 
             if ($isFilteringSessionCategory) {
@@ -516,7 +517,6 @@ class SessionManager
         }
 
         $formatted_sessions = array();
-
         if (Database::num_rows($result)) {
             $sessions = Database::store_result($result, 'ASSOC');
             if ($get_count) {