Всем привет!
В Функциональных Модулях есть такая вкладка "Изменение".
Кто-нибудь знает, каким этот параметр является (вход, выход, одиночная переменная, строка, таблица ... ) и чем отличается от параметров, объявляемых в "Таблицы"

When you exchange data with function modules, you can distinguish clearly between three kinds of parameters:
-Importing parameters, which are received by the function module
-Exporting parameters, which are returned by the function module
-Changing parameters, which are both received and returned.
By default, all parameters are passed by reference. To avoid unwanted side effects, you can only change exporting and changing parameters in the function module. If you want to pass parameters by value, you must select the relevant option when you define the interface.

You can also declare importing and changing parameters as optional. You do not have to pass values to these parameters when you call the function module. Where possible, you should use this option when you add new parameters to function modules that are already in use. You can assign a default value to an optional parameter. If you do not pass a value of your own when you call the function module, the system then uses the default value instead. Export parameters are always optional.
You may specify the type of an elementary parameter. You must specify the type of a structured or table parameter. You can use either ABAP Dictionary types, ABAP Dictionary objects, predefined ABAP types (I, F, P, N, C, STRING, X, XSTRING, D, T) or user-defined types. Any type conflicts show up in the extended program check.

Tables parameters are obsolete for normal function modules, but have been retained to ensure compatibility for function modules with other execution modes.