You must define the following for a table field in the ABAP Dictionary:
When you create a table, all the fields in it are automatically assigned initial values (NOT NULL) irrespective of the value of the Initial Value indicator in the ABAP Dictionary. The same happens when you convert a table. It is only when you create or add new fields that they are not automatically assigned initial values (for performance reasons during update of the table). An exception to this is key fields, which are always given initial values.
The initial value depends on the data type of the field. For more information, see Overview of initial values for the external data types in the F1 help.
You can also include the fields of a structure in the table.
You can assign the data type , length and short text in different ways:
Other assignment options are:
An input check for the field can be defined with a foreign key . This input check appears on all the screens in which the field is used.
A search help can be assigned to a field. This search help defines the input help flow on all the screens in which the field is used.
You must specify the table field in which the corresponding unit of measure or currency can be found for fields containing quantities (data type QUAN) or currency amounts (data type CURR).
See also: