Field Symbol in Modify Statement

[Former Member]

i have to use Field Symbol in following modify statement.

Plz help with code...

LOOP AT itab_data INTO wa_data.

wa_data-f1 = logic.

wa_data-f2 = logic.

MODIFY itab_data FROM wa_data INDEX sy-tabix.

ENDLOOP.

Thanks in advance.

regards

[Former Member]

field-symbols : <fs> like itab_data.

LOOP AT itab_data assigning <fs>.

<fs>-f1 = logic.

<fs>-f2 = logic.

MODIFY itab_data FROM <fs> INDEX sy-tabix.

ENDLOOP.

[Former Member]

Hai

Check the following Links & code

Go through the following Link

This documentation should answer your question. I use field symbols when using dynamic programming.

Just go through these links.

http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/frameset.htm

http://help.sap.com/saphelp_nw04/helpdata/en/16/0dce0a0cf711d3b9360000e8353423/content.htm

http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3930358411d1829f0000e829fbfe/content.htm

Field-Symbols are place holders for existing fields.

A Field-Symbol does not physically reserve space for a field but points to a field, which is not known until run time of the program.

Field-Symbols are like Pointers in Programming language e C e.

Syntax check is not effective.

Syntax :

Data : v1(4) value eabcdf.

Field-symbols <fs>.

Assign v1 to <fs>.

Write:/ <fs>.

DATA: BEGIN OF LINE,

COL1 TYPE I,

COL2 TYPE I,

END OF LINE.

DATA ITAB LIKE SORTED TABLE OF LINE WITH UNIQUE KEY COL1.

FIELD-SYMBOLS <FS> LIKE LINE OF ITAB.

DO 4 TIMES.

LINE-COL1 = SY-INDEX.

LINE-COL2 = SY-INDEX ** 2.

APPEND LINE TO ITAB.

ENDDO.

READ TABLE ITAB WITH TABLE KEY COL1 = 2 ASSIGNING <FS>.

<FS>-COL2 = 100.

<b>READ TABLE ITAB WITH TABLE KEY COL1 = 3 ASSIGNING <FS>.

MODIFY itab FROM <fs> INDEX sy-tabix</b>

IF <FS> IS ASSIGNED.

WRITE '<FS> is assigned!'.

ENDIF.

LOOP AT ITAB ASSIGNING <FS>.

WRITE: / <FS>-COL1, <FS>-COL2.

ENDLOOP.

Regards

Sreeni