Notes on examples related using of Field symbols

Hi,
I want some notes having examples of field symbols.
Thanks & regards,
Chetan

I still don't follow what you are referring as Field Symbols. If you talking about using Form variables dynamically in a query then check this thread
Variables in query ??
Suda

Similar Messages

Proper use of Field symbol .. please help

what is the proper use of field symbol in sap abap ?
Moderator Message: Please do a proper search for such basic questions.
Edited by: kishan P on Sep 13, 2010 4:01 PM

hi Gopal,
The parameter is used to color a cell in ALV grid.
See this example how it is used
http://www.sap-img.com/abap/line-color-in-alv-example.htm
take a closer look at the code where the info is passed
MOVE 'MATNR' TO wa_color-fname.
        MOVE '6'         TO wa_color-color-col.
        MOVE '1'         TO wa_color-color-int.
        MOVE '1'         TO wa_color-color-inv.
        APPEND wa_color TO it_color.
Cheers
VJ
If it helps dont forget to mark points

How to use different field symbols to append data in a loop

Hi experts!
I have to loop over a itab and I want to save different into one table.
See my code below:
DATA: l_hours        TYPE i,
      grfk_ok_code    TYPE sy-ucomm,
      grfk_values     TYPE TABLE OF GPRVAL WITH HEADER LINE,
      grfk_coltxt     TYPE TABLE OF GPRTXT WITH HEADER LINE,
      wa_ztab         TYPE zqm_chq_prueflos,
      l_index      TYPE n,
      l_field      TYPE string,
      l_line_check TYPE string
FIELD-SYMBOLS:
      <fs_0102>   TYPE ANY,
      <fs_0304>   TYPE ANY,
      <fs_0506>   TYPE ANY,
      <fs_grenze> TYPE ANY
REFRESH: grfk_values.
CLEAR:   l_hours.
LOOP AT ztab INTO wa_ztab.
AT NEW qase_serialnr.
    CLEAR: l_line_check.
    IF wa_ztab-qase_serialnr CS '-01'
    OR wa_ztab-qase_serialnr CS '-02'.
        grfk_values-rowtxt = 'gelötet'.
        l_line_check = '0102'.
    ELSEIF wa_ztab-qase_serialnr CS '-03'
    OR     wa_ztab-qase_serialnr CS '-04'.
        grfk_values-rowtxt = 'geglüht'.
        l_line_check = '0304'.
    ELSEIF wa_ztab-qase_serialnr CS '-05'
    OR     wa_ztab-qase_serialnr CS '-06'.
        grfk_values-rowtxt = 'unbehandelt'.
        l_line_check = '0506'.
    ELSE.
      grfk_values-rowtxt = 'serialnr_wrong'.
    ENDIF.
ENDAT.
***---------------------------------------------------->
AT NEW qapp_usern1.
*   X-axis: values are:0,50,100,...,400
    grfk_coltxt-coltxt = wa_ztab-qapp_usern1.
    SHIFT grfk_coltxt-coltxt LEFT DELETING LEADING '0'.
    APPEND grfk_coltxt.
    UNASSIGN <fs_grenze>.
    CLEAR: l_index, l_field.
    l_index = sy-tabix.
    CONCATENATE 'grfk_values-val' l_index INTO l_field.
    ASSIGN (l_field) TO <fs_grenze>.
    IF sy-subrc <> 0.
      EXIT.
    ENDIF.
    <fs_grenze> = 10.
    APPEND grfk_values.
ENDAT.
IF l_line_check = '0102'.
      UNASSIGN <fs_0102>.
      CLEAR: l_index, l_field.
      l_index = sy-tabix.
      CONCATENATE 'grfk_values-val' l_index INTO l_field.
      ASSIGN (l_field) TO <fs_0102>.
      IF sy-subrc <> 0.
        EXIT.
      ENDIF.
      <fs_0102> = wa_ztab-cf_dgp.
ELSEIF l_line_check = '0304'.
      UNASSIGN <fs_0304>.
      CLEAR: l_index, l_field.
      l_index = sy-tabix.
      CONCATENATE 'grfk_values-val' l_index INTO l_field.
      ASSIGN (l_field) TO <fs_0304>.
      IF sy-subrc <> 0.
        EXIT.
      ENDIF.
      <fs_0304> = wa_ztab-cf_dgp.
ELSEIF l_line_check = '0506'.
      UNASSIGN <fs_0506>.
      CLEAR: l_index, l_field.
      l_index = sy-tabix.
      CONCATENATE 'grfk_values-val' l_index INTO l_field.
      ASSIGN (l_field) TO <fs_0506>.
      IF sy-subrc <> 0.
        EXIT.
      ENDIF.
      <fs_0506> = wa_ztab-cf_dgp.
ENDIF.
ENDLOOP.
My goal should be to fill the graphic with 4 Lines:
1 is boarderline.
2-3 are the lines with the looped values in "ztab"
Do I have to use references to write the values in into different rows of internal table "grfk_values"????
With this code I want to fill the itab which I need for the GFW_PRES_SHOW function.
The table I have to commit has the following structure:
-rowtxt
-val1
-val2
-val31
EDIT:
My current output are 2 lines the first has value 0 for each point and the second shows the correct values... The boarder which always should have value 10 is completly not shown.

hopen this will help
report zrich_0001 .
data: begin of itab1 occurs 0,
      fld1(10) type c,
      fld2(10) type c,
      fld3(10) type c,
      end of itab1.
data: begin of itab2 occurs 0,
    flda(10) type c,
    fldb(10) type c,
    fldc(10) type c,
    end of itab2.
field-symbols: <fs_table> type table,
               <fs_wa>,
               <fs>.
data: mod_field(10) type c.
itab1-fld1 = '1'. itab1-fld2 = '2'. itab1-fld3 = '3'. append itab1.
itab1-fld1 = '4'. itab1-fld2 = '5'. itab1-fld3 = '6'. append itab1.
itab2-flda = 'A'. itab2-fldb = 'B'. itab2-fldc = 'C'. append itab2.
itab2-flda = 'D'. itab2-fldb = 'E'. itab2-fldc = 'F'. append itab2.
assign itab1[] to <fs_table>.
assign itab1 to <fs_wa>.
mod_field = 'FLD2'.
perform modify_table.
perform write_table.
assign itab2[] to <fs_table>.
assign itab2 to <fs_wa>.
mod_field = 'FLDC'.
perform modify_table.
perform write_table.
      FORM modify_table                                             *
form modify_table.
loop at <fs_table> into <fs_wa>.
    assign component mod_field of structure <fs_wa> to <fs>.
    <fs> = 'Modified'.
    modify <fs_table> from <fs_wa>.
endloop.
endform.
      FORM write_table                                             *
form write_table.
loop at <fs_table> into <fs_wa>.
    do.
      assign component sy-index of structure <fs_wa> to <fs>.
      if sy-subrc <> 0.
        exit.
      endif.
      if sy-index = 1.
        write:/ <fs>.
      else.
        write: <fs>.
      endif.
    enddo.
endloop.
endform.
regards
navjot
reward points if helpfull

Use of FIELD-SYMBOLS

let me know how to use and why to use FIELD-SYMBOLS in the program

Hi,
A field symbol can point to any data object. The data object to which a field symbol points is assigned to it after it has been declared in the program.
Example
DATA: v_char(10).
FIELD-SYMBOLS: <fs>.
ASSIGN v_char to <fs>.
v_char = 10. " The value for v_char is changed.
write: / <fs>.
Thanks,
Naren

Using of field-symbols iw32

Hello to everyone!
I've found in forum a special trick, wich in userexit for Headerdetails of servceorder give me information about position:
data: element(50) type c,
sresbd like resbd.
field-symbols: <iresbd> type table.
element = '(SAPLCOBC)RESB_BT[]'.
assign (element) to <iresbd>.
When I tried to debug I can read for example material number od the third position with
<iresbd>[3]- matnr
but in the program, after using this code I get the message that this field dosent exist.

I still don't follow what you are referring as Field Symbols. If you talking about using Form variables dynamically in a query then check this thread
Variables in query ??
Suda

Using ASSIGN - Field Symbol

I have used
import <GT_POS_DATA> from memory id 'lines'.
and have the same{<GT_POS_DATA>} in my zreport. Now I have to sum
up one field and move it to a variable to be displayed in my report
output.
How shld I proceed.
Thanks in advance.

Hi,
Am facing problem over here :
ASSIGN COMPONENT wkgbtr OF STRUCTURE <WA> TO <FIELD>.
This is the part of code I used :
FIELD-SYMBOLS: <gt_pos_data> TYPE table,
<WA> type any,
<field> type any.
LOOP AT <GT_POS_DATA> ASSIGNING <WA>.
ASSIGN COMPONENT <wa>-wkgbtr OF STRUCTURE <WA> TO <FIELD>.
lV_tot = lV_tot + <FIELD>.
ENDLOOP.

I can't use my field-symbols in my select statement...

Hello experts,
I am have been having problems with my report for the past days. My problem is,
I declared a dynamic field symbol so that I can use it in my select statement
instead of the standard internal table. But it is giving me a dump. Below is my code:
REPORT zfr_forex_rev_acctg
       NO STANDARD PAGE HEADING
       LINE-COUNT 0
       LINE-SIZE 100.
Data dictionary tables                       *
TABLES: bsis,
        bsas,
        tcurr,
        t001.
FIELD-SYMBOLS: <fs_dyntable> TYPE STANDARD TABLE,
               <fs_dynline> TYPE ANY,
               <fs_fld>      TYPE ANY,
               <fs_data>     TYPE REF TO data,
               <fs_1>        TYPE ANY,
               <fs_2>        TYPE ANY TABLE.
CLASS lcl_main DEFINITION.
PUBLIC SECTION.
    METHODS: build_table,
             get_data,
             combine_data,
             display_header,
             display_results.
PRIVATE SECTION.
    TYPES: BEGIN OF t_bsis_bsas,
            zuonr TYPE bsis-zuonr,
            gjahr TYPE bsis-gjahr,
            belnr TYPE bsis-belnr,
            bldat TYPE bsis-bldat,
            waers TYPE bsis-waers,
            blart TYPE bsis-blart,
            dmbtr TYPE bsis-dmbtr,
            wrbtr TYPE bsis-wrbtr,
            hkont TYPE bsis-hkont,
            amount TYPE bsis-wrbtr,
           END OF t_bsis_bsas.
    DATA: it_bsis_bsas TYPE STANDARD TABLE OF t_bsis_bsas,
          v_counter TYPE i.
data declarations for internal table
    DATA: lt TYPE lvc_t_fcat,
          ls TYPE lvc_s_fcat,
          fldname(50) TYPE c,
          it_ddfields TYPE TABLE OF ddfield,
          wa_ddfields LIKE LINE OF it_ddfields.
ENDCLASS.
CLASS lcl_main IMPLEMENTATION.
METHOD build_table
METHOD build_table.
    DATA: lv_from    TYPE bsis-gjahr,
          lv_asof    TYPE bsis-gjahr,
          lv_check   TYPE i,
          lt_data TYPE REF TO data,
          lt      TYPE lvc_t_fcat.
    FIELD-SYMBOLS: <fs_year> TYPE gjahr.
    ASSIGN lv_asof TO <fs_year>.
    lv_from = p_year.
    lv_asof = p_asof+0(4).
    v_counter = lv_asof - lv_from.
    wa_ddfields-fieldname = 'ZUONR'.
    wa_ddfields-position = '0001'.
    wa_ddfields-datatype = 'CHAR'.
    wa_ddfields-leng      = '000018'.
    wa_ddfields-decimals = '00000'.
    APPEND wa_ddfields TO it_ddfields.
    wa_ddfields-fieldname = 'GJAHR'.
    wa_ddfields-position = '0002'.
    wa_ddfields-datatype = 'NUMC'.
    wa_ddfields-leng      = '000004'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
    wa_ddfields-fieldname = 'BELNR'.
    wa_ddfields-position = '0003'.
    wa_ddfields-datatype = 'CHAR'.
    wa_ddfields-leng      = '000010'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
    wa_ddfields-fieldname = 'BLDAT'.
    wa_ddfields-position = '0004'.
    wa_ddfields-datatype = 'DATS'.
    wa_ddfields-leng      = '000008'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
    wa_ddfields-fieldname = 'WAERS'.
    wa_ddfields-position = '0005'.
    wa_ddfields-datatype = 'CUKY'.
    wa_ddfields-leng      = '000005'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
    wa_ddfields-fieldname = 'BLART'.
    wa_ddfields-position = '0006'.
    wa_ddfields-datatype = 'CHAR'.
    wa_ddfields-leng      = '000002'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
    wa_ddfields-fieldname = 'DMBTR'.
    wa_ddfields-position = '0007'.
    wa_ddfields-datatype = 'CURR'.
    wa_ddfields-leng      = '000013'.
    wa_ddfields-decimals = '000002'.
    APPEND wa_ddfields TO it_ddfields.
    wa_ddfields-fieldname = 'WRBTR'.
    wa_ddfields-position = '0008'.
    wa_ddfields-datatype = 'CURR'.
    wa_ddfields-leng      = '000013'.
    wa_ddfields-decimals = '000002'.
    APPEND wa_ddfields TO it_ddfields.
    wa_ddfields-fieldname = 'HKONT'.
    wa_ddfields-position = '0009'.
    wa_ddfields-datatype = 'CHAR'.
    wa_ddfields-leng      = '000010'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
    wa_ddfields-fieldname = 'AMOUNT'.
    wa_ddfields-position = '0010'.
    wa_ddfields-datatype = 'CURR'.
    wa_ddfields-leng      = '000010'.
    wa_ddfields-decimals = '000002'.
    APPEND wa_ddfields TO it_ddfields.
    DATA: lv_position TYPE i.
    lv_position = 0011.
    WHILE lv_check < v_counter.
     <fs_year> = lv_asof.
      wa_ddfields-fieldname = <fs_year>.
      wa_ddfields-position = lv_position.
      wa_ddfields-datatype = 'NUMC'.
      wa_ddfields-leng      = '000004'.
      wa_ddfields-decimals = '000000'.
      APPEND wa_ddfields TO it_ddfields.
      lv_asof = lv_asof - 1.
      ADD 1 TO: lv_check, lv_position.
    ENDWHILE.
    CLEAR lv_position.
    lv_position = 1.
    LOOP AT it_ddfields INTO wa_ddfields.
      ls-col_pos   = lv_position.
      ls-row_pos   = lv_position.
      ls-fieldname = wa_ddfields-fieldname.
      APPEND ls TO lt.
      ADD 1 TO lv_position.
    ENDLOOP.
    CLEAR lv_position.
    ASSIGN lt_data TO <fs_data>.
    CALL METHOD cl_alv_table_create=>create_dynamic_table
     EXPORTING
      it_fieldcatalog = lt
     IMPORTING
      ep_table = <fs_data>
     EXCEPTIONS
      generate_subpool_dir_full = 1
     OTHERS = 2.
    IF sy-subrc <> 0.
    ENDIF.
    ASSIGN <fs_data>->* TO <fs_1>.
    ASSIGN <fs_1> TO <fs_2>.
    ASSIGN <fs_1> TO <fs_dyntable>.
ENDMETHOD.
METHOD get_data
METHOD get_data.
*get records from BSIS
    SELECT zuonr gjahr belnr bldat waers blart dmbtr wrbtr hkont
    FROM bsis
    INTO CORRESPONDING FIELDS OF TABLE <fs_dyntable>
    WHERE bukrs = p_bukrs
      AND hkont IN s_hkont
      AND budat <= p_asof.
*get records from BSAS
    SELECT zuonr gjahr belnr bldat waers blart dmbtr wrbtr hkont
    FROM bsas
    APPENDING CORRESPONDING FIELDS OF TABLE <fs_dyntable>
    WHERE bukrs = p_bukrs
      AND hkont IN s_hkont
      AND budat <= p_asof
      AND augdt > p_asof.
ENDMETHOD.
START-OF-SELECTION.
DATA: main TYPE REF TO lcl_main.
CREATE OBJECT main.
CALL METHOD main->build_table.
CALL METHOD main->get_data.
Need help on this problem. Thanks a lot guys and take care!

Hi guys,
I found out the problem and Andreas is right. Now, I am having problems when including DMBTR, WRBTR in my select statement. All the others are ok. Here is my modified code. Please suggest what I need to add/modify. Thanks a lot!
CLASS lcl_main IMPLEMENTATION.
METHOD build_table
METHOD build_table.
    DATA: lv_from    TYPE bsis-gjahr,
          lv_asof    TYPE bsis-gjahr,
          lv_check   TYPE i,
          lt_data TYPE REF TO data,
          lt      TYPE lvc_t_fcat.
    FIELD-SYMBOLS: <fs_year> TYPE gjahr.
    ASSIGN lv_asof TO <fs_year>.
    lv_from = p_year.
    lv_asof = p_asof+0(4).
    v_counter = lv_asof - lv_from.
ZUONR
    wa_ddfields-fieldname = 'ZUONR'.
    wa_ddfields-position = '0001'.
    wa_ddfields-datatype = 'CHAR'.
    wa_ddfields-leng      = '000018'.
    wa_ddfields-decimals = '00000'.
    APPEND wa_ddfields TO it_ddfields.
GJAHR
    wa_ddfields-fieldname = 'GJAHR'.
    wa_ddfields-position = '0002'.
    wa_ddfields-datatype = 'NUMC'.
    wa_ddfields-leng      = '000004'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
BELNR
    wa_ddfields-fieldname = 'BELNR'.
    wa_ddfields-position = '0003'.
    wa_ddfields-datatype = 'CHAR'.
    wa_ddfields-leng      = '000010'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
BLDAT
    wa_ddfields-fieldname = 'BLDAT'.
    wa_ddfields-position = '0004'.
    wa_ddfields-datatype = 'DATS'.
    wa_ddfields-leng      = '00008'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
WAERS
    wa_ddfields-fieldname = 'WAERS'.
    wa_ddfields-position = '0005'.
    wa_ddfields-datatype = 'CUKY'.
    wa_ddfields-leng      = '000005'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
BLART
    wa_ddfields-fieldname = 'BLART'.
    wa_ddfields-position = '0006'.
    wa_ddfields-datatype = 'CHAR'.
    wa_ddfields-leng      = '000002'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
DMBTR
    wa_ddfields-fieldname = 'DMBTR'.
    wa_ddfields-position = '0007'.
    wa_ddfields-datatype = 'CURR'.
    wa_ddfields-leng      = '000013'.
    wa_ddfields-decimals = '000002'.
    APPEND wa_ddfields TO it_ddfields.
WRBTR
    wa_ddfields-fieldname = 'WRBTR'.
    wa_ddfields-position = '0008'.
    wa_ddfields-datatype = 'CURR'.
    wa_ddfields-leng      = '000013'.
    wa_ddfields-decimals = '000002'.
    APPEND wa_ddfields TO it_ddfields.
HKONT
    wa_ddfields-fieldname = 'HKONT'.
    wa_ddfields-position = '0009'.
    wa_ddfields-datatype = 'CHAR'.
    wa_ddfields-leng      = '000010'.
    wa_ddfields-decimals = '000000'.
    APPEND wa_ddfields TO it_ddfields.
AMOUNT
    wa_ddfields-fieldname = 'AMOUNT'.
    wa_ddfields-position = '0010'.
    wa_ddfields-datatype = 'CURR'.
    wa_ddfields-leng      = '000010'.
    wa_ddfields-decimals = '000002'.
    APPEND wa_ddfields TO it_ddfields.
    DATA: lv_position TYPE i.
    lv_position = 0011.
Additional fields for the years
    WHILE lv_check < v_counter.
      wa_ddfields-fieldname = <fs_year>.
      wa_ddfields-position = lv_position.
      wa_ddfields-datatype = 'NUMC'.
      wa_ddfields-leng      = '000004'.
      wa_ddfields-decimals = '000000'.
      APPEND wa_ddfields TO it_ddfields.
      lv_asof = lv_asof - 1.
      ADD 1 TO: lv_check, lv_position.
    ENDWHILE.
    CLEAR lv_position.
    lv_position = 1.
    LOOP AT it_ddfields INTO wa_ddfields.
      CASE wa_ddfields-fieldname.
        WHEN 'BLDAT'.
          ls-col_pos   = lv_position.
          ls-row_pos   = lv_position.
          ls-fieldname = wa_ddfields-fieldname.
          ls-inttype   = 'D'.
          ls-ref_table = 'BSIS'.
          ls-ref_field = 'BLDAT'.
        WHEN 'WAERS'.
          ls-col_pos   = lv_position.
          ls-row_pos   = lv_position.
          ls-fieldname = wa_ddfields-fieldname.
          ls-ref_table = 'BSIS'.
          ls-ref_field = 'WAERS'.
        when 'DMBTR'.
          ls-col_pos   = lv_position.
          ls-row_pos   = lv_position.
          ls-fieldname = wa_ddfields-fieldname.
          ls-ref_table = 'BSIS'.
          ls-ref_field = 'DMBTR'.
        when 'WRBTR'.
          ls-col_pos   = lv_position.
          ls-row_pos   = lv_position.
          ls-fieldname = wa_ddfields-fieldname.
          ls-ref_table = 'BSIS'.
          ls-ref_field = 'WRBTR'.
        WHEN OTHERS.
          ls-col_pos   = lv_position.
          ls-row_pos   = lv_position.
          ls-fieldname = wa_ddfields-fieldname.
      ENDCASE.
      APPEND ls TO lt.
      ADD 1 TO lv_position.
    ENDLOOP.
    CLEAR lv_position.
    ASSIGN lt_data TO <fs_data>.
    CALL METHOD cl_alv_table_create=>create_dynamic_table
     EXPORTING
      it_fieldcatalog = lt
     IMPORTING
      ep_table = <fs_data>
     EXCEPTIONS
      generate_subpool_dir_full = 1
     OTHERS = 2.
    IF sy-subrc <> 0.
    ENDIF.
    ASSIGN <fs_data>->* TO <fs_1>.
    ASSIGN <fs_1> TO <fs_2>.
    ASSIGN <fs_1> TO <fs_dyntable>.
ENDMETHOD.

Doubt in using a Field symbols

Hi gurus,
i want to use field symbols for a varying fields in a table.
like my fields are ZPER01 SHKZG01
                          ZPER02 SHKZG02
                          ZPER03 SHKZG03
                         ......ZPER0N SHKZG0N
now i have to populate values in this using field symbols how do i do it.(These fields are in a custom table)
thanks in advance,
Vanathi
Edited by: vanathi sekar on May 2, 2008 2:15 PM

DATA: BEGIN OF text,
        word1 TYPE c LENGTH 4 VALUE 'AAAA',
        word2 TYPE c LENGTH 4 VALUE 'BBBB',
        word3 TYPE c LENGTH 4 VALUE 'CCCC',
        word4 TYPE c LENGTH 4 VALUE 'DDDD',
      END OF text.
DATA: word TYPE c LENGTH 4,
      char1 TYPE c LENGTH 1,
      char2 TYPE c LENGTH 1,
      leng TYPE i.
FIELD-SYMBOLS <word> LIKE text-word1.
DATA inc TYPE i.
DESCRIBE FIELD text LENGTH leng IN CHARACTER MODE.
leng = leng / 2.
DO leng TIMES VARYING char1 FROM text(1)
                            NEXT text+2(1) RANGE text
              VARYING char2 FROM text+1(1)
                            NEXT text+3(1) RANGE text.
WRITE: char1, char2.
char1 = 'x'.
char2 = 'y'.
ENDDO.
DO 4 TIMES VARYING word FROM text-word1 NEXT text-word2.
WRITE / word.
ENDDO.
DO.
inc = sy-index - 1.
ASSIGN text-word1 INCREMENT inc TO <word> RANGE text.
IF sy-subrc = 0.
    WRITE / <word>.
ELSE.
    EXIT.
ENDIF.
ENDDO.
Please assign points.

How to use field symbol in select

Hi,
    CONCATENATE 'WTG0' LV_MON INTO LV_FNAME.
    ASSIGN (LV_FNAME) TO <FS>.
    SELECT SINGLE <FS> FROM COSP INTO LV_SAPRST
         WHERE OBJNR = LV_OBJ AND GJAHR = LV_YEAR AND WRTTP = '4' AND KSTAR = GT_INOUT-SAKNR
   Error message :    Unknown column name "<FS>" . field list. . field list. field list.
   actually , if i use if command, i can do, but i want to use simple code by fieldsymbol.
   is it possible in select command?
Thanks in advance
Benjamin

Hi
Hope it will help you.
reward if help.
Field Symbols
Field symbols are placeholders or symbolic names for other fields. They do not physically reserve space for a field, but point to its contents. A field symbol cam point to any data object. The data object to which a field symbol points is assigned to it after it has been declared in the program.
Whenever you address a field symbol in a program, you are addressing the field that is assigned to the field symbol. After successful assignment, there is no difference in ABAP whether you reference the field symbol or the field itself. You must assign a field to each field symbol before you can address the latter in programs.
Field symbols are similar to dereferenced pointers in C (that is, pointers to which the content operator * is applied). However, the only real equivalent of pointers in ABAP, that is, variables that contain a memory address (reference) and that can be used without the contents operator, are reference variables in ABAP Objects.
All operations programmed with field symbols are applied to the field assigned to it. For example, a MOVE statement between two field symbols moves the contents of the field assigned to the first field symbol to the field assigned to the second field symbol. The field symbols themselves point to the same fields after the MOVE statement as they did before.
You can create field symbols either without or with type specifications. If you do not specify a type, the field symbol inherits all of the technical attributes of the field assigned to it. If you do specify a type, the system checks the compatibility of the field symbol and the field you are assigning to it during the ASSIGN statement.
Field symbols provide greater flexibility when you address data objects:
If you want to process sections of fields, you can specify the offset and length of the field dynamically.
You can assign one field symbol to another, which allows you to address parts of fields.
Assignments to field symbols may extend beyond field boundaries. This allows you to address regular sequences of fields in memory efficiently.
You can also force a field symbol to take different technical attributes from those of the field assigned to it.
The flexibility of field symbols provides elegant solutions to certain problems. On the other hand, it does mean that errors can easily occur. Since fields are not assigned to field symbols until runtime, the effectiveness of syntax and security checks is very limited for operations involving field symbols. This can lead to runtime errors or incorrect data assignments.
While runtime errors indicate an obvious problem, incorrect data assignments are dangerous because they can be very difficult to detect. For this reason, you should only use field symbols if you cannot achieve the same result using other ABAP statements.
For example, you may want to process part of a string where the offset and length depend on the contents of the field. You could use field symbols in this case. However, since the MOVE statement also supports variable offset and length specifications, you should use it instead. The MOVE statement (with your own auxiliary variables if required) is much safer than using field symbols, since it cannot address memory beyond the boundary of a field. However, field symbols may improve performance in some cases.
check the below links u will get the answers for your questions
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/content.htm
http://www.sts.tu-harburg.de/teaching/sap_r3/ABAP4/field_sy.htm
http://searchsap.techtarget.com/tip/1,289483,sid21_gci920484,00.html
Syntax Diagram
FIELD-SYMBOLS
Basic form
FIELD-SYMBOLS <fs>.
Extras:
1. ... TYPE type
2. ... TYPE REF TO cif
3. ... TYPE REF TO DATA
4. ... TYPE LINE OF type
5. ... LIKE s
6. ... LIKE LINE OF s
7. ... TYPE tabkind
8. ... STRUCTURE s DEFAULT wa
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas. See Cannot Use Untyped Field Symbols ad Cannot Use Field Symbols as Components of Classes.
Effect
This statement declares a symbolic field called <fs>. At runtime, you can assign a concrete field to the field symbol using ASSIGN. All operations performed with the field symbol then directly affect the field assigned to it.
You can only use one of the additions.
Example
Output aircraft type from the table SFLIGHT using a field symbol:
FIELD-SYMBOLS <PT> TYPE ANY.
DATA SFLIGHT_WA TYPE SFLIGHT.
ASSIGN SFLIGHT_WA-PLANETYPE TO <PT>.
WRITE <PT>.
Addition 1
... TYPE type
Addition 2
... TYPE REF TO cif
Addition 3
... TYPE REF TO DATA
Addition 4
... TYPE LINE OF type
Addition 5
... LIKE s
Addition 6
... LIKE LINE OF s
Addition 7
... TYPE tabkind
Effect
You can define the type of the field symbol using additions 2 to 7 (just as you can for FORM parameters (compare Defining the Type of Subroutine Parameters). When you use the ASSIGN statement, the system carries out the same type checks as for USING parameters of FORMs.
This addition is not allowed in an ABAP Objects context. See Cannot Use Obsolete Casting for FIELD SYMBOLS.
In some cases, the syntax rules that apply to Unicode programs are different than those for non-Unicode programs. See Defining Types Using STRUCTURE.
Effect
Assigns any (internal) field string or structure to the field symbol from the ABAP Dictionary (s). All fields of the structure can be addressed by name: <fs>-fieldname. The structured field symbol points initially to the work area wa specified after DEFAULT.
The work area wa must be at least as long as the structure s. If s contains fields of the type I or F, wa should have the structure s or at least begin in that way, since otherwise alignment problems may occur.
Example
Address components of the flight bookings table SBOOK using a field symbol:
DATA SBOOK_WA LIKE SBOOK.
FIELD-SYMBOLS <SB> STRUCTURE SBOOK
DEFAULT SBOOK_WA.
WRITE: <SB>-BOOKID, <SB>-FLDATE.
Related
ASSIGN, DATA
Additional help
Declaring Field Symbols

How to use field symbols in program

how to use field symbols can any one explain with example please..
Regards,
venki...

Hi
Field Symbols
Field symbols are placeholders or symbolic names for other fields. They do not physically reserve space for a field, but point to its contents. A field symbol cam point to any data object. The data object to which a field symbol points is assigned to it after it has been declared in the program.
Whenever you address a field symbol in a program, you are addressing the field that is assigned to the field symbol. After successful assignment, there is no difference in ABAP whether you reference the field symbol or the field itself. You must assign a field to each field symbol before you can address the latter in programs.
Field symbols are similar to dereferenced pointers in C (that is, pointers to which the content operator * is applied). However, the only real equivalent of pointers in ABAP, that is, variables that contain a memory address (reference) and that can be used without the contents operator, are reference variables in ABAP Objects.
All operations programmed with field symbols are applied to the field assigned to it. For example, a MOVE statement between two field symbols moves the contents of the field assigned to the first field symbol to the field assigned to the second field symbol. The field symbols themselves point to the same fields after the MOVE statement as they did before.
You can create field symbols either without or with type specifications. If you do not specify a type, the field symbol inherits all of the technical attributes of the field assigned to it. If you do specify a type, the system checks the compatibility of the field symbol and the field you are assigning to it during the ASSIGN statement.
Field symbols provide greater flexibility when you address data objects:
If you want to process sections of fields, you can specify the offset and length of the field dynamically.
You can assign one field symbol to another, which allows you to address parts of fields.
Assignments to field symbols may extend beyond field boundaries. This allows you to address regular sequences of fields in memory efficiently.
You can also force a field symbol to take different technical attributes from those of the field assigned to it.
The flexibility of field symbols provides elegant solutions to certain problems. On the other hand, it does mean that errors can easily occur. Since fields are not assigned to field symbols until runtime, the effectiveness of syntax and security checks is very limited for operations involving field symbols. This can lead to runtime errors or incorrect data assignments.
While runtime errors indicate an obvious problem, incorrect data assignments are dangerous because they can be very difficult to detect. For this reason, you should only use field symbols if you cannot achieve the same result using other ABAP statements.
For example, you may want to process part of a string where the offset and length depend on the contents of the field. You could use field symbols in this case. However, since the MOVE statement also supports variable offset and length specifications, you should use it instead. The MOVE statement (with your own auxiliary variables if required) is much safer than using field symbols, since it cannot address memory beyond the boundary of a field. However, field symbols may improve performance in some cases.
check the below links u will get the answers for your questions
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/content.htm
http://www.sts.tu-harburg.de/teaching/sap_r3/ABAP4/field_sy.htm
http://searchsap.techtarget.com/tip/1,289483,sid21_gci920484,00.html
Syntax Diagram
FIELD-SYMBOLS
Basic form
FIELD-SYMBOLS <fs>.
Extras:
1. ... TYPE type
2. ... TYPE REF TO cif
3. ... TYPE REF TO DATA
4. ... TYPE LINE OF type
5. ... LIKE s
6. ... LIKE LINE OF s
7. ... TYPE tabkind
8. ... STRUCTURE s DEFAULT wa
The syntax check performed in an ABAP Objects context is stricter than in other ABAP areas. See Cannot Use Untyped Field Symbols ad Cannot Use Field Symbols as Components of Classes.
Effect
This statement declares a symbolic field called <fs>. At runtime, you can assign a concrete field to the field symbol using ASSIGN. All operations performed with the field symbol then directly affect the field assigned to it.
You can only use one of the additions.
Example
Output aircraft type from the table SFLIGHT using a field symbol:
FIELD-SYMBOLS <PT> TYPE ANY.
DATA SFLIGHT_WA TYPE SFLIGHT.
ASSIGN SFLIGHT_WA-PLANETYPE TO <PT>.
WRITE <PT>.
Addition 1
... TYPE type
Addition 2
... TYPE REF TO cif
Addition 3
... TYPE REF TO DATA
Addition 4
... TYPE LINE OF type
Addition 5
... LIKE s
Addition 6
... LIKE LINE OF s
Addition 7
... TYPE tabkind
Effect
You can define the type of the field symbol using additions 2 to 7 (just as you can for FORM parameters (compare Defining the Type of Subroutine Parameters). When you use the ASSIGN statement, the system carries out the same type checks as for USING parameters of FORMs.
This addition is not allowed in an ABAP Objects context. See Cannot Use Obsolete Casting for FIELD SYMBOLS.
In some cases, the syntax rules that apply to Unicode programs are different than those for non-Unicode programs. See Defining Types Using STRUCTURE.
Effect
Assigns any (internal) field string or structure to the field symbol from the ABAP Dictionary (s). All fields of the structure can be addressed by name: <fs>-fieldname. The structured field symbol points initially to the work area wa specified after DEFAULT.
The work area wa must be at least as long as the structure s. If s contains fields of the type I or F, wa should have the structure s or at least begin in that way, since otherwise alignment problems may occur.
Example
Address components of the flight bookings table SBOOK using a field symbol:
DATA SBOOK_WA LIKE SBOOK.
FIELD-SYMBOLS <SB> STRUCTURE SBOOK
DEFAULT SBOOK_WA.
WRITE: <SB>-BOOKID, <SB>-FLDATE.
<b>Reward points for useful Answers</b>
Regards
Anji

Problem related to field-Symbol?

HI All,
I am writting the below coding, Please tell me whether the Field Symbol will act as a table or not as I want to append a lot of data to field symbol. Please tell me is there any problem in the code.
LOOP AT lt_vepoequi_keys into ls_vepoequi_keys.
        READ TABLE lt_vekp ASSIGNING <ls_vekp_str> with key
          matnr = ls_vepoequi_keys-matnr.
        IF sy-subrc = 0.
          <ls_vekp_str>-stoff = ls_vepoequi_keys-stoff.
          <ls_vekp_str>-sonum = ls_vepoequi_keys-sonum.
          <ls_vekp_str>-lagkl = ls_vepoequi_keys-lagkl.
          <ls_vekp_str>-lagkt = ls_vepoequi_keys-lagkt.
endif.
endloop.

Hi Abhinav,
you have internal table (say it_employee) with fields name,age,senior_category.
now when you loop this internal table you will need workarea.
loop at it_employee into wa_employee.
                  if wa_employee-age > 60.
                        wa_employee-senior_category = 'YES'.
                  else.
                          wa_employee-senior_category = 'NO'.
                  endif.
                          modify it_employee from wa_employee.
                 endloop.
now one use of Field-symbols is : when internal table is huge and when you loop with workarea and modify internal table each time, it takes time. So if we use Field-symbols performance would increase.
loop at it_employee assigning into <fs_employee>.
                  if <fs_employee>-age > 60.
                        <fs_employee>-senior_category = 'YES'.
                  else.
                          <fs_employee>-senior_category = 'NO'.
                  endif.
            endloop.
Now you see in the above code, i have not used modify statement because when i loop internal table, the field symbol points directly to the memory of internal table.
So during loop if i assign any value to the field symbol then it directly changes the internal table value, so there wont be any need to use modify statement.
Hope you are clear with this example....
Regards
Sajid

Even though am using Field-Symbol correctly, showing error!!!

Hello
Below is my code,
LOOP AT itab_data INTO <fs_data>.
   CHECK <fs_data>-error_flag = 'X'.
   READ TABLE itab_docnum INTO <fs_docnum>
    WITH KEY docnum = <fs_data>+4(16)
    BINARY SEARCH.
LOOP AT itab_data INTO <fs_data>.
   CHECK <fs_data>+1(10) <> 'END_REC'(025) AND
         <fs_data>+1(10) <> 'BEGIN_REC'(026).
     ASSIGN <fs_data>+1(*) TO <fs_edid2> CASTING.
     <fs_data> = <fs_edid2>.
   MOVE-CORRESPONDING <fs_data> TO w_edi_dd.
   <fs_data>+1    = w_edi_dd.
But, am getting the below error message in SLIN/Extended Prog Check.
Fieldsymbol <FS_DATA> is not assigned to a field
(The message can be hidden with "#EC *)
1) I do not understand why am getting this (if itab contains any data then ONLY the loop will be executed right?)
2) How to correct this?
Thank you

Hello,
Correct method of using a field-symbol is to assign it first with the structure.
You use INTO if working with work area. Example:
LOOP AT itab_data INTO w_data.
Use assigning keyword when using field-symbol in case of LOOP...ENDLOOP.
LOOP AT itab_data ASSIGNING <fs_data>.
Check below link on 'Assigning Data Objects to Field Symbols':
http://help.sap.com/SAPhelp_nw04/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/frameset.htm
Hope it helps!
Regards,
Saba
Edited by: Saba Sayed on Feb 27, 2011 11:35 PM

Modify DB by single field using Field Symbol

Hi,
please help me ,actually i have not use the field symbol in any object. i have one requirement ,i have to modify the DB by field STATUS using Field symbol ,
I am sending u my code so please help me how can i modify DB using field symbol..
          gw_msg3_status1   = k_status1 .
          LOOP AT gi_msg3 INTO gs_msg3.
            gs_msg3-status = gw_msg3_status1 .
            gs_msg3-issue   = lw_issuno.
       MODIFY gi_msg3 FROM gs_msg3 TRANSPORTING status.
            MODIFY gi_msg3 INDEX sy-tabix FROM gs_msg3 TRANSPORTING issue status.
          ENDLOOP.
Thanks & Regards,
Meenakshi

perform dboperation_table using 'SET' 'BIRTHDT' '=' <fs>.
    perform dboperation_table using 'WHERE' 'PARTNER' '=' <fs>
    perform dboperation_update using 'BUT000'.
form dboperation_table
using p_type
      p_var1
      p_var2
      p_var3.
data: t_l type cmst_str_data.
data: d_cx_root            type ref to cx_root,
        d_text               type string.
try.
      clear t_l.
      if p_var3 is not initial.
        t_l = p_var3.
        condense t_l.
        concatenate '''' t_l '''' into t_l.
      endif.
      concatenate p_var1 p_var2 t_l into t_l
      separated by space.
      case p_type.
        when 'SET'.   append t_l to g_s_t.
        when 'WHERE'. append t_l to g_w_t.
      endcase.
    catch cx_root into d_cx_root.
      d_text = d_cx_root->get_text( ).
      message a398(00) with d_text.
endtry.
endform.                    "DBOPERATION_table
form dboperation_update
using p_tabname type zdboperation-tabname.
data: tabname type bus_table.
data: d_cx_root            type ref to cx_root,
        d_text               type string.
try.
      tabname-tabname = p_tabname.
      call function 'ZDBOPERATION_UPDATE'
        in update task
        exporting
          tabname     = tabname
        tables
          where_table = g_w_t
          set_table   = g_s_t.
    catch cx_root into d_cx_root.
      d_text = d_cx_root->get_text( ).
      message a398(00) with d_text.
endtry.
endform.                    "DBOPERATION_update
Hope it will help you.
Regards,
Madan.

Field symbols not working in data transfer VOFM routine

Hi,
I have been trying to set a value using field symbols, however for some reasons its not working. I am using a field symbol in a data transfer routine and the value which I am trying to set is a standard field outside the VOFM routine code.
I am trying to set a field gla_subrc which is actually a changing parameter.
The actual paramter is gn_subrc of type sy-subrc and within the form the name is gla_subrc. I need to set this changing parameter gla_subrc using the data transfer routine.
Is there a specific rule that field symbols dont work for changing paramters within subroutine or is there a specific syntax.
The syntax I am using is
ASSIGN ('(SAPLV50S)gla_subrc') to <fs>.
I also used the local program name instead of main program but still that does not work. Tried using the actual parameter as well.
Can someone please help me in this.
Thanks & Regards,
Naresh.

I need to stop outbound delivery creation against STO using vl10b transaction. The only way to stop creation is using data transfer delivery VOFM routine.
If i give an error message MESSAGE E001, this will give a hard error which is not acceptable. To avoid this, i use a perform message statment with message id and certain parameters which can displayed in a log.
However to make sure this message is displayed in log, I am clearing a work area having specific data needed for delivery creation.
Because of this clear, my error message gets captured in log but along with this another fake message is displayed in log which caused by the clear message.
The user gets confused as he now sees 2 messages, 1 which is correct and other 1 which is fake and that confuses him.
Data transfer routine is not the best place to give messages in log but we have very few options. The only way the system can give 1 message is if i set gla_subrc to 1. This is a variable which will help the system understand that the delivery should not be created as there is something wrong because the value is 1. Hence it will stop the creation and instead display whatever message i had passed to the log.
I need to somehow set this variable to 1 based on lot of analysis that has been done in the past.
Please let me know if there is any way by which we can fix this.
Thanks & Regards,
Naresh.

How to use field symbols

can anyone tell me how to use field symbols. What effect it has on performance of a program?
what r its avantages?
iam working on a report where iam facing a lot of problems in performance issue. can anyone tell how field symbols are useful in this regard?
thanx to all

Check the below links
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/content.htm
FIELD-SYMBOLS
Basic form
FIELD-SYMBOLS <fs>.
Additions
1. ... STRUCTURE s DEFAULT wa
2. ... TYPE t
3. ... TYPE LINE OF t
4. ... LIKE s
5. ... LIKE LINE OF s
Effect
This statement declares a symbolic field called <fs>. At runtime, you can assign a concrete field to the field symbol using ASSIGN . All operations performed with the field symbol then directly affect the field assigned to it.
You can only use one of the additions.
Example
Output aircraft type from the table SFLIGHT using a field symbol:
FIELD-SYMBOLS <PT>.
TABLES SFLIGHT.
ASSIGN SFLIGHT-PLANETYPE TO <PT>.
WRITE <PT>.
Addition 1
... STRUCTURE s DEFAULT wa
Effect
Assigns any (internal) field string or structure to the field symbol from the ABAP/4 Dictionary ( s ). All fields of the structure can be addressed by name: <fs>-fieldname . The structured field symbol points initially to the work area wa specified after DEFAULT .
The work area wa must be at least as long as the structure s . If s contains fields of the type I or F, wa should have the structure s or at least begin in that way, since otherwise alignment problems may occur.
Example
Address components of the flight bookings table SBOOK using a field symbol:
DATA SBOOK_WA LIKE SBOOK.
FIELD-SYMBOLS <SB> STRUCTURE SBOOK
DEFAULT SBOOK_WA.
WRITE: <SB>-BOOKID, <SB>-FLDATE.
Addition 2
... TYPE t
Addition 3
... TYPE LINE OF t
Addition 4
... LIKE s
Addition 5
... LIKE LINE OF s
Effect
You can use additions 2 to 5 to type field symbols in the same way as FORM parameters (see also Type assignment of subroutine parameters). ASSIGN performs the same type checks as with USING parameters of FORM s.

Notes on examples related using of Field symbols

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