.. ================================================== .. FOR YOUR INFORMATION .. -------------------------------------------------- .. -*- coding: utf-8 -*- with BOM. .. include:: ../../../Includes.txt .. _developers_ownextension_exttablessql: ext_tables.sql ============== Please add the line from below to your table definition in your ext_tables.sql .. code:: sql CREATE TABLE my_table ( ... rootpid int(11) DEFAULT '0' NOT NULL, ... ); Replace "my_table" with the name of your table. You may use another field name than "rootpid" for example "my_rootpid". But then you have this to configure in your TCA too. See the ctrl section in the :ref:`TCA `