Field Symbols

[Former Member]

What is ment by following statements?

ASSIGN A INCREMENT B TO <FS>.

ASSIGN A INCREMENT <FS1> TO <FS2>.

ASSIGN <FS1> INCREMENT <FS2> TO <FS3>.

[Former Member]

Hi,

Increments the field symbol <fs>, starting from f, by n times the length of f. You cannot use offset/length addressing in f. If the system cannot assign f to the field symbol - that is, if it addresses an invalid memory area - the field symbol remains unchanged and sy-subrc is set to 4.

SY-SUBRC = 0:

The field was assigned successfully.

SY-SUBRC = 4:

The field was not assigned successfully. the field symbol

remains unchanged

Example

DATA: cf(26) TYPE c VALUE 'abcdefghijklmnopqrstuvwxyz'.

FIELD-SYMBOLS: <fs> TYPE c.

ASSIGN cf(2) TO <fs>.

DO 5 TIMES.

WRITE <fs>.

ASSIGN <fs> INCREMENT 3 TO <fs>.

ENDDO.

In this example, the field symbol points to the first two characters of the field cf. Then in each loop pass, the field symbol is incremented 3 times 2 characters. The system then displays the result: ab gh mn st yz.

Example

TYPES: BEGIN OF comp,

f1 TYPE string,

f2 TYPE i,

END OF comp.

DATA: BEGIN OF stru,

k1 TYPE comp,

k2 TYPE comp,

k3 TYPE comp,

k4 TYPE comp,

END OF stru.

FIELD-SYMBOLS: TYPE comp.

ASSIGN stru-k1 TO RANGE stru.

DO 4 TIMES.

...

ASSIGN INCREMENT 1 TO .

ENDDO.

This example shows you how to edit a sequence of identically-typed sub-structures in a loop.

Source SAP Help,

Regards,

Amit