- * @param string $prefix the appropriate table's field name prefix ('page', 'pl', etc)
- * @param $db DatabaseBase object to use
- * @return mixed string with SQL where clause fragment, or false if no items.
+ * @param string $prefix The appropriate table's field name prefix ('page', 'pl', etc)
+ * @param DatabaseBase $db DatabaseBase object to use
+ * @return string|bool String with SQL where clause fragment, or false if no items.