OK, i found a way
instead of trying to change the field type in the in the DataExtension function, I update the db fields in the _config.php file:
$fields = Config::inst()->get('EditableFormField', 'db', Config::UNINHERITED);
$fields['Title'] = 'Text';
Config::inst()->update('EditableFormField', 'db', $fields);
Posted to: Dataextension - change db field type | Show Thread | Post Reply