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Former Member

Field Symbol in Modify Statement

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

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2 Answers

  • Best Answer
    author's profile photo Former Member
    Former Member
    Posted on Aug 02, 2006 at 05:22 PM

    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.

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  • author's profile photo Former Member
    Former Member
    Posted on Aug 02, 2006 at 05:26 PM

    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

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