How to dynamically assign type to a field-symbol?

Hi,
I have two fields in one table, one for field name and one for table name. These can be fields in different
tables. I need to fetch value of this field in that table. So the type of this variable can change dynamically.
I am trying to assign type of this field dynamically to a field-symbol. I have to use this field symbol in a
select statement. Currently it is showing a dumb, as the field type is dec7. For some other types it is
working fine.
Regards,
Sunil

Hi all,
I have the same problem.
I tried with your helps but i can't fix them.
A message is raised "Field <fs_bet> unknown" when i used code below
FIELD-SYMBOLS: <fs_bet> TYPE any.
DATA: c_bet TYPE string.
DATA it_0008 type STANDARD TABLE OF pa0008 WITH HEADER LINE.
DO 40 TIMES.
CONCATENATE 'BET0' index into c_bet.
ASSIGN (c_bet) to <fs_bet> CASTING TYPE pad_amt7s .
select * from pa0008 into it_0008
     where <fs_bet> = '1000'
     and pernr = 32.
     append it_0008.
ENDSELECT.
ENDDO.
Please help me to solve it.
Thanks so much,
Sophie Tran

Similar Messages

How to check data type of the field symbol at run time

Hi,
My code is as following:
      LOOP AT <fs> ASSIGNING <wa_covp_ext>.
        ASSIGN COMPONENT 86 OF STRUCTURE <wa_covp_ext> TO <f_zzname>.
        IF sy-subrc = 0.
          ASSIGN COMPONENT 158 OF STRUCTURE <wa_covp_ext> TO <f_pernr>.
          IF sy-subrc = 0.
              SELECT SINGLE sname INTO <f_zzname> FROM pa0001
                            WHERE pernr = <f_pernr>
                            AND endda GE sy-datum
                            AND begda LE sy-datum.
         ENDIF.
      ENDIF.
    ENDLOOP.
This query is giving dump when <f_zzname> is type P length 8 and decimals 2, because it tries to put PA0001-sname into it which is type C length 30. So I want to check the type of <f_zzname> before the select statement. If it is character 30, then I will write the select statement else not.
How to check data type of the field symbol at run time? If it's not possible, then can somebody suggest a workaround? Thanks.

check this ...
write describe statement ...
field-symbols : <f_zzname> .
data : sname like pa0001-sname,
       typ(10).
assign sname to <f_zzname>.
describe field <f_zzname> type typ.
write : typ. <-- typ contains character type in this case ..
U can check if typ is of character(C) if so .. write the select statement ...

Assign Type conflict with field symbols

I have two tables tab1 & tab2, want to assign field values from tab1 to tab2 suing field symbols. Deatils are :
TYPES: BEGIN OF ty_tab1,
    item1   TYPE char20,
    item2   TYPE char20,
    val1 type i,
    val2 type i,
END OF ty_tab1,
BEGIN OF ty_tab2,
    item1 TYPE char20,
    item2 TYPE char20,
END OF ty_tab2.
DATA: it_tab1 TYPE TABLE OF ty_tab1,
            it_tab2 TYPE TABLE OF ty_tab2.
FIELD-SYMBOLS <fs_tab1> TYPE ty_tab1.
                 <fs_tab2t> type ty_tab2.
LOOP AT it_tab1 assigning <fs_tab1>.
    READ TABLE it_tab2 assigning <fs_tab2> WITH KEY item1 = <fs_tab1>-item1
                                                                                item2 = <fs_tab1>-item2.
    IF sy-subrc EQ 0.
      ASSIGN COMPONENT 'ITEM1' OF STRUCTURE <fs_tab1> TO <fs_tab2>.
     ASSIGN COMPONENT 'ITEM2' OF STRUCTURE <fs_tab1> TO <fs_tab2>.
    endif.
endloop.
Getting error msg
You attempted to assign a field to a typed field symbol, but the field does not have the required type.
whats the reason of error.
Edited by: Matt on May 27, 2011 8:59 AM - added tags

Taken from example dump
A new value is to be assigned to the field "...", although this field is
entirely or partly protected against changes.
The following are protected against changes:
- Character literals or numeric literals
- Constants (CONSTANTS)
- Parameters of the category IMPORTING REFERENCE for functions and
methods
- Untyped field symbols not yet assigned a field using ASSIGN
- TABLES parameters if the actual parameter is protected against changes
- USING reference parameters and CHANGING parameters for FORMs, if the
actual parameter is protected against changes and
- Accesses using field symbols if the field assigned using ASSIGN is
protected (or partially protected, e.g. key components of an internal
table with the type SORTED or HASHED TABLE) against changes
- Accesses using references, if the field bound to the reference is
protected (or partially protected) against changes
- External write accesses to READ-ONLY attributes,
- Content of a shared object area instance accessed using a shared lock
(ATTACH_FOR_READ).
You likely fall in one of these cases. Check each and if still unsure please share your code so we can reproduce the error.
Regards
Marcin

Dynamically table read / write with field symbols

Hi,
I like to read dynamically from a table via field symbols. The reading part is working.
But now I like to do some changes on the entry and then write it to another table with a similar structure.
I use SAP 4.6c
There I have two problems:
1. At the statement I get a dump:
<l_sysid> = sy-sysid.
--> Field symbol has not yet been assigned.
I think that the problem is somewhere around
assign <table_to> to <wa_to>.
2. the data change inside the loop. There I like to add the sysid to the target-wa and then copy the source-wa it to the new target-wa to append it to the target table.
But this does not work. What kind of code do I need? The "move-correspondig" is not correct.
--> see code around
loop at <table_from> assigning <wa_from>.
Below you can find my code. The problem is within the last loop-statement.
FUNCTION Z_MIG_COPY_TABLE.
*"*"Lokale Schnittstelle:
*" IMPORTING
*"     REFERENCE(I_TABNAME_FROM) TYPE TABNAME
*"     REFERENCE(I_TABNAME_TO) TYPE TABNAME
*"     REFERENCE(I_KOMP_TRANS) LIKE ZS_KOMP_TRANS STRUCTURE
*"        ZS_KOMP_TRANS OPTIONAL
*" TABLES
*"      I_SELCON STRUCTURE ZS_SELCON
*" EXCEPTIONS
*"      NOT_FOUND
*"      OTHERS
* zeilenweiser Aufbau Tabelle I_SELCON z.B.:
* bukrs = 3011
* AND
* bstyp = 'F'
* I_KOMP_TRANS
* dient zur Uebersetzung von alt/neu, z.B. bei LIFNR
* der angegebene Funktionsbaustein wird genutzt,
* um den neuen Wert der übergebenen Komponente zu ermitteln
* Angabe z.B.:
* LIFNR
DATA: dref       TYPE REF TO data,
        dref_to    TYPE REF TO data,
        i_alv_cat TYPE TABLE OF lvc_s_fcat,
        ls_alv_cat LIKE LINE OF i_alv_cat,
        i_alv_cat_to TYPE TABLE OF lvc_s_fcat,
        ls_alv_cat_to LIKE LINE OF i_alv_cat.
DATA: BEGIN OF itab OCCURS 0.
*        INCLUDE STRUCTURE dntab.
          INCLUDE structure DFIES.
DATA: END OF itab.
DATA: BEGIN OF itab_to OCCURS 0.
*        INCLUDE STRUCTURE dntab.
          INCLUDE structure DFIES.
DATA: END OF itab_to.
FIELD-SYMBOLS: <table_from>   TYPE ANY TABLE.
FIELD-SYMBOLS: <table_to>     TYPE Standard TABLE.
FIELD-SYMBOLS: <wa_from>      TYPE ANY.
FIELD-SYMBOLS: <wa_to>        TYPE ANY.
FIELD-SYMBOLS: <l_komp>       TYPE ANY.
FIELD-SYMBOLS: <l_sysid>      TYPE ANY.
Data: l_alt type ELIFN.
Data: l_neu type ELIFN.
CALL FUNCTION 'DDIF_NAMETAB_GET'
       EXPORTING
            TABNAME   = i_tabname_from
       TABLES
            DFIES_TAB = itab
       EXCEPTIONS
            NOT_FOUND = 1
            OTHERS    = 2.
IF SY-SUBRC = 1.
    raise not_found.
elseif sy-subrc = 2.
    raise others.
ENDIF.
LOOP AT itab .
    ls_alv_cat-fieldname = itab-fieldname.
    ls_alv_cat-ref_table = i_tabname_from.
    ls_alv_cat-ref_field = itab-fieldname.
    APPEND ls_alv_cat TO i_alv_cat.
ENDLOOP.
* build internal table
CALL METHOD cl_alv_table_create=>create_dynamic_table
      EXPORTING
        it_fieldcatalog = i_alv_cat
      IMPORTING
        ep_table = dref.
ASSIGN dref->* TO <table_from>.
CALL FUNCTION 'DDIF_NAMETAB_GET'
       EXPORTING
            TABNAME   = i_tabname_to
       TABLES
            DFIES_TAB = itab_to
       EXCEPTIONS
            NOT_FOUND = 1
            OTHERS    = 2.
IF SY-SUBRC = 1.
    raise not_found.
elseif sy-subrc = 2.
    raise others.
ENDIF.
LOOP AT itab_to.
    ls_alv_cat_to-fieldname = itab_to-fieldname.
    ls_alv_cat_to-ref_table = i_tabname_to.
    ls_alv_cat_to-ref_field = itab_to-fieldname.
    APPEND ls_alv_cat_to TO i_alv_cat_to.
ENDLOOP.
* break-point.
* build internal table
CALL METHOD cl_alv_table_create=>create_dynamic_table
      EXPORTING
        it_fieldcatalog = i_alv_cat_to
      IMPORTING
        ep_table = dref_to.
ASSIGN dref_to->* TO <table_to>.
*Select Ursprungstabelle mit Selektionsbedingungen
SELECT * FROM (i_tabname_from) up to 5 rows
    INTO CORRESPONDING FIELDS OF TABLE <table_from>
    where (i_selcon).
* break-point.
*Aufbau interne Tabelle mit eventuell geänderten Feldern
assign <table_to> to <wa_to>.
if not I_KOMP_TRANS is initial.
    loop at <table_from> assigning <wa_from>.
      assign component I_KOMP_TRANS-KOMP
        of structure <wa_from> to <l_komp>.
      CALL FUNCTION I_KOMP_TRANS-FUBA
           EXPORTING
                I_KOMP = I_KOMP_TRANS-KOMP
                I_ALT = <l_komp>
           IMPORTING
                E_NEU = <l_komp>.
      break-point.
      assign component 'SYSID' of structure <wa_to> to <l_sysid>.
      <l_sysid> = sy-sysid.
*      move-corresponding <wa_from> to <wa_to>.
      append <wa_to> to <table_to>.
    endloop.
*    break-point.
*Speichern der ausgelesenen Daten in Zieltabelle
    MODIFY (i_tabname_to) FROM TABLE <table_to>.
    if sy-subrc <> 0.
      MESSAGE E001(ZMESSAGES) WITH i_tabname_to.
*   Fehler beim Modify von Tabelle '&'.
    endif.
else.
*Speichern der ausgelesenen Daten in Zieltabelle
    MODIFY (i_tabname_to) FROM TABLE <table_from>.
    if sy-subrc <> 0.
      MESSAGE E001(ZMESSAGES) WITH i_tabname_to.
*   Fehler beim Modify von Tabelle '&'.
    endif.
endif.
commit work.
if sy-subrc <> 0.
    MESSAGE E002(ZMESSAGES) WITH i_tabname_to.
*   Fehler beim Commit von Tabelle '&'.
endif.
* break-point.
ENDFUNCTION.
Thanks a lot for any hints.
Regards
Tom

Hi,
Answers below.
1) For this...you assigning an internal table to a work area...
assign <table_to> to <wa_to>.
This should solve the problem..
* Create the target work area..
DATA: new_line TYPE REF TO data.
CREATE DATA new_line LIKE LINE OF <table_to>.
ASSIGN new_line->* TO <wa_to>.
Now the target work area is created..
2) For the second one...
************New code
   FIELD-SYMBOLS: <FS>,<FS1>.
************New code End.
   loop at <table_from> assigning <wa_from>.
      assign component I_KOMP_TRANS-KOMP
        of structure <wa_from> to <l_komp>.
      CALL FUNCTION I_KOMP_TRANS-FUBA
           EXPORTING
                I_KOMP = I_KOMP_TRANS-KOMP
                I_ALT = <l_komp>
           IMPORTING
                E_NEU = <l_komp>.
      break-point.
      assign component 'SYSID' of structure <wa_to> to <l_sysid>.
      <l_sysid> = sy-sysid.
************New code
      LOOP AT itab .
         ASSIGN COMPONENT itab-fieldname of structure <WA_FROM> TO <FS>.
         CHECK SY-SUBRC = 0.
         ASSIGN COMPONENT itab-fieldname of structure <WA_TO> TO <FS1>.
         CHECK SY-SUBRC = 0.
* Move from source to target.
         <FS1> = <FS>.
      ENDLOOP.
************New code End
      append <wa_to> to <table_to>.
    endloop.
Thanks
Naren

Run Time: type conflicts in field symbol

In this statement i am getting run time error : assign component.
type conflicts in field symbol
FIELD-SYMBOLS:
    <fs_tab> TYPE ANY table,
     <wa_tab> TYPE ANY,
     <fs_field> type crmd_orderadm_h.
DATA:      w_data    TYPE REF TO data.
CREATE DATA w_data TYPE STANDARD TABLE OF (c_tabname) WITH NON-                     UNIQUE DEFAULT KEY.
    ASSIGN w_data->* TO <fs_tab>.
SELECT * FROM (c_tabname)
          INTO CORRESPONDING FIELDS OF TABLE <fs_tab>
LOOP AT <fs_tab> ASSIGNING <wa_tab>.
      DO.
        ASSIGN COMPONENT sy-index OF STRUCTURE <wa_tab> TO <fs_field>.
*Writeing: fs_field here*
Enddo.

FIELD-SYMBOLS: <fs_field> type crmd_orderadm_h.
<fs_field> type any.
i cannot pass "
lv_header_guid =    <fs_field>-guid.
complete code as follows.
LOOP AT <fs_tab> ASSIGNING <wa_tab>.
      DO.
        ASSIGN COMPONENT sy-index OF STRUCTURE <wa_tab> TO <fs_field>.
*i am assining fs_field-guid here. Thats why i am taking this field symbol as type "crmd_orderadm_h"*
*bold* * <fs_field>-guid.*bold**
        lv_header_guid =    <fs_field>-guid.
        iv_header_guid = lv_header_guid.
        REFRESH: lt_header_guid.
        INSERT iv_header_guid INTO TABLE lt_header_guid.
        REFRESH: im_orderadm_h,im_text.
        CALL FUNCTION 'CRM_ORDER_READ'
          EXPORTING
            it_header_guid       = lt_header_guid
          IMPORTING
            et_orderadm_h        = im_orderadm_h
            et_text              = im_text
          EXCEPTIONS
            document_not_found   = 1
            error_occurred       = 2
            document_locked      = 3
            no_change_authority = 4
            no_display_authority = 5
            no_change_allowed    = 6
            OTHERS               = 7.
        IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
*         WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
        ENDIF.
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Type Conflict In Field Symbol

Hi All,
We were doing a report to read all major infotypes and displaying the relevant data. It was working fine until we included Personal data (Infotype 0002).
We used a field symbol of type any and pnnnn type prelp. It was working fine. But when we included details from PA0002, it is throwing a runtime error stating type conflict between field symbol and pnnnn. (We used pnnnn[] = <f>.
Note: We are using ECC 6.0 and the program is Unicode enabled
Kind Regards
Hari Sankar M

Hi Prince,
Yes. You need to change the declaration as follows.
Field symbols:<wa_ext> TYPE ANY,
<f_zname> TYPE any.
Data: lv_zname type sname.
ASSIGN COMPONENT 86 OF STRUCTURE <wa_ext> TO <f_zname>.
lv_zname = <f_zname>.
Try the above mentioned code. I think this should work.
Best Regards,
Ram.

Query in Optimal Coding - Assigning INT TAB to FIELD SYMBOLS dynamically.

TABLES: tkesk.
DATA: itkesk type table of tkesk.
DATA: BEGIN of itab_RP occurs 11,
tabname type string,
END of itab_RP.
DATA : wa_rp like line of itab_Rp,
wa_onemore like line of itkesk.
FIELD-SYMBOLS: <fs> LIKE itkesk.
ITAB_RP-tabname = 'ITKESK'.
APPEND ITAB_RP.
LOOP at ITAB_RP into wa_rp.
<i><b>*How to assign the table itkesk to the field symbol
*which is available in wa_rp dynamically instead of assigning it directly)</b></i>
*ASSIGN wa_rp-tabname to <fs>.
ASSIGN itkesk to <fs>.
   LOOP at <fs> into wa_onemore.
   WRITE : 'hi'.
   endloop.
ENDLOOP.

Is this even possible ?
Thanks
Mark

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How to delete a particular record in field symbol

Hi,
i am declaring field symbol type any table i, i want delete a particular record in that filed symbol.
How to do that.

Hello Himam,
It is not possible to delete directly from <itab> as it is of generic type.
But you can do loop at <itab> ASSIGNING <wa> and then you can clear content of <wa> this will delete
the line from internal table.
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Augustin.

How to define an itab including a field-symbols

*Please see below code, I define a field-symbols structure <wa>:
FIELD-SYMBOLS: <wa>   TYPE ANY.
data: wa type ref to data.
create data wa type (p_table).
assign wa-> to <wa>.
My question is after <wa> get assigned, if I want to define a new internal table or structure which should include <wa>, like below:
data: begin of itab occurs 0.
include structure <wa>.
data: status type c.
data: end of itab.
But it doesn't work. How can I do that?
Thank you very much!

Hi Yu,
Just check with this example, u will get a good idea.
PROGRAM ZMAIN.
DATA: BEGIN OF STR,
          A VALUE 'a',
          B VALUE 'b',
          C VALUE 'c',
          D VALUE 'd',
        END   OF STR,
        CN(5) VALUE 'D'.
FIELD-SYMBOLS <FS> TYPE ANY.
DO 3 TIMES.
    ASSIGN COMPONENT SY-INDEX OF
           STRUCTURE STR TO <FS>.
    IF SY-SUBRC <> 0. EXIT. ENDIF.
    WRITE <FS>.
ENDDO.
ASSIGN COMPONENT CN OF STRUCTURE STR TO <FS>.
WRITE <FS>.
2.
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.
PROGRAM P1MAIN.
TABLES TRDIR.
DATA NAME(30) VALUE 'TFDIR-PNAME'.
FIELD-SYMBOLS <F> TYPE ANY.
MOVE 'XYZ_PROG' TO TRDIR-NAME.
PERFORM U IN PROGRAM P1SUB.
ASSIGN (NAME) TO <F>.
WRITE <F>.
CALL FUNCTION 'EXAMPLE'.
PROGRAM P1SUB.
TABLES TFDIR.
FORM U.
    FIELD-SYMBOLS <F> TYPE ANY.
    DATA NAME(30) VALUE 'TRDIR-NAME'.
    ASSIGN TABLE FIELD (NAME) TO <F>.
    WRITE <F>.
    MOVE 'FCT_PROG' TO TFDIR-PNAME.
ENDFORM.
FUNCTION-POOL FUN1.
FUNCTION EXAMPLE.
    DATA NAME(30) VALUE 'TRDIR-NAME'.
    FIELD-SYMBOLS <F> TYPE ANY.
    ASSIGN (NAME) TO <F>.
    IF SY-SUBRC = 0.
      WRITE <F>.
    ELSE.
      WRITE / 'TRDIR-NAME cannot be reached'.
    ENDIF.
ENDFUNCTION.
PROGRAM P1MAIN.
TABLES TRDIR.
MOVE 'XYZ_PROG' TO TRDIR-NAME.
CALL FUNCTION 'EXAMPLE'.
FUNCTION-POOL FUN1.
FUNCTION EXAMPLE.
    DATA NAME(30) VALUE 'TRDIR-NAME'.
    FIELD-SYMBOLS <FS> TYPE ANY.
    ASSIGN LOCAL COPY OF MAIN
      TABLE FIELD (NAME) TO <FS>.
    IF SY-SUBRC = 0.
      WRITE <FS>.
    ELSE.
      WRITE / 'Cannot find TRDIR-NAME'.
    ENDIF.
ENDFUNCTION.
Regards,
Kumar

ASSIGN Component ... (field symbol stuff)

Hi,
I want to validate certain fields (KNA1, BUKRS, KOART, FNAME) which are
entered by the user in the transaction XK01. They are being captured in a structure, lets say X_LFA1.
To validate this fields I am being asked to use field symbols using component assign.
Can someone tell me how do I do this ?

Tushar,
Its still not clear to me what exactly you are trying to do.
Is it like you just want to see if those fields exist in the table or not? If yes, you can do like this.
parameter : p_field -- field entered by the user
data : wa_ztable like ztable.
field-symbols : <fs_any> type any.
Assign component p_field of structure wa_ztable to <fs_any>.
if sy-subrc = 0.
Success.
endif.
Regards,
Ravi

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Hi,
I want to build a internal table, which consists of several field symbols. Each field symbol points to an entry of other internal tables. All of these tables have different structure definition. How can I implement it. If it is possible, it can save a lot of table query time.
I will be very appreciate for your help.
Best Regards, Jun

hello jun
i hope the following example give the some idea to build internal table fileds with differen field symbol data types.
FIELD-SYMBOLS:<f1> type any,<f2> TYPE ANY.
data:BEGIN OF itab,
     t1 type i value 10,
     t2(30) type c value 'john',
   t3 type p DECIMALS 3 value '4.7658',
   END OF itab.
ASSIGN itab to <f1>.
DO 3 TIMES.
ASSIGN COMPONENT sy-index OF STRUCTURE <f1> TO <f2>.
WRITE <f2>.
ENDDO.
types:begin of it_line,
      i1 type i,
      t1 type string,
      p1 type p DECIMALS 3,
end of it_line.
data:itab1 type table of it_line.
FIELD-SYMBOLS:<f1>.
ASSIGN itab1 to <f1>.
and also u can refer the following links
1-> http://help.sap.com/saphelp_wp/helpdata/en/fc/eb387a358411d1829f0000e829fbfe/content.htm
2--> http://help.sap.com/saphelp_nw70/helpdata/en/fc/eb3923358411d1829f0000e829fbfe/content.htm
Thanks&Regards
sreenivas p

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I am currently writing my code in a given user-exit in VA01. My problem is,
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can you please paste the piece of code here ...

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