In addition to listing the individual fields, you can also include the fields of another structure in
tables and structures. Individual fields and includes can be mixed as required.
When an include is changed, all the tables and structures that include it are automatically adjusted.
Structure A was included in table B. A new field is inserted in structure A. When structure A is activated, table B is adjusted to this change, that is the new field is also inserted there.
You can assign the include a
group name with which the group of fields in the include can be addressed as a whole in ABAP programs.Includes can also be nested, that is structure A includes structure B which in turn includes another structure C, etc. The maximum nesting depth is limited to nine. The maximum length of a path of nested includes in a table or structure is therefore nine (the table/structure itself not included).
Only
flat structures can be included. In a flat structure, every field either refers to a data element or is directly assigned a data type, length and possibly decimal places.Only structures may be included in a table. Tables, structures and views may be included in a structure.
The length of the field names is more restricted in tables than in structures. In a table, a field name may not have more than 16 places, but in a structure up to 30 places are allowed for the field name. A structure therefore can only be included in a table if none of the field names of the structure are longer than 16 places.
The path of nested includes may only contain one table.
Table TAB1 includes structure STRUCT1, which in turn includes structure STRUCT2. The path of the nested includes here only contains table TAB1. It is also possible to include TAB1 in a further structure STRUCT0,
but no other table TAB2 may be included in TAB1 since in this case a path of nested includes would contain two tables (TAB1 and TAB2).
See also:
Inserting an Include