--- class.Cleaner.php	2019-05-22 04:40:25.000000000 +0200
+++ class.Cleane_new.php	2019-05-22 04:37:34.000000000 +0200
@@ -36,7 +36,7 @@
    * @ingroup database
    */
   private static function cleanerGetCacheTables() {
-    return db_query("SHOW TABLES LIKE 'cache%'")->fetchCol();
+    return db_query("SHOW TABLES LIKE '{cache}%'")->fetchCol();
   }
 
   /**