Query on field symbols

Hi all,
one basic question.
I tried to find it but could not get.
This is is to declare an internal table .
data : lr_ref TYPE REF TO data.
how do we similarly declare a work area?
Regards,
Harshit Rungta

Hi Harshit,
We can modify them same as we update the static tables.
For eg -
<ls_ecamiopracc_mid>-vkont = lv_account
<ls_ecamiopracc_mid>-xaccexist = lc_x.
Hope this resolves your query.
Regards,
Manish

Similar Messages

Query about field symbol

Hi,
Can we write a query like this using field symbol.
<FS> is a field symbol mapped onto an internal table.
select * from dbtab into corresponding field of internal_tab for all entries in <FS>
where field1 = <FS>-field1.
It gives a syntax error when I check this query. Even if I turn field1 into a field symbol <FS1> to hold the field name, it gives an error.
Could anyone advice in this context.
Thanks for the help in advance.
Regards,
Vijay

Vijay,
Its not a limitation.
You would have declared your table like this, right?
FIELD-SYMBOLS : <FT> TYPE TABLE.
Now, unless you assign this to table, the field symbols will not have a structure, right. This assignment happens only at runtime. So, there is no way that the system can identify <FT>-field1 at design time and compile the same, right?
However, the question is if you know the structure at design time, why do you want to use a field symbols for the table?
Regards,
Ravi
Note : Please mark the helpful answers

Error while trying to run Bex Query -------- Field symbol is not assigned.

Hello Every body,
I am facing the following error after giving some value in Selection screen and trying to run the Bex Query
ERROR : Field symbol is not assigned.
Thanks in advance,
Praveen

can u plz give details of variables, what it is build on and the value u r inputing,
also is thr any dump.
double click on the error message it shows u. it will give u the detailed error message. post that too

Problem using field symbols in Query...

Hi,
I am fetching the name of the table and field which I will be using in the query using field symbols. But it gives syntax error...
select single OBJECTTABLE OBJECTFIELD into help_numtab from Zobjectname
where OBJECTNAME = P_OBJECT.
field-symbols : <number> type any.
field-symbols : <module> type any.
ASSIGN help_numtab-OBjectfield to <number>.
ASSIGN help_numtab-OBjecttable to <module>.
/* Here <number> = MATNR and <module> = MARA.
select <NUMBER> into table help_item
from <MODULE>
where ERNAM = SY-UNAME.
This gives a syntax error which says <module> is not defined in ABAP DDIC.

instead of field symbols, you ccan try this..
select (help_numtab-OBjectfield) into table help_item
from (help_numtab-OBjecttable)
where ERNAM = SY-UNAME.
~Suresh

How to use Field-symbol with dynamic select query

Can anybody tell me, how to use field-symbols in the dynamic select query.

FIELD-SYMBOLS <fs> { typing | STRUCTURE struc DEFAULT dobj }.
1. ... typing
2. ... STRUCTURE struc DEFAULT dobj
The FIELD-SYMBOLS statement declares a field symbol <fs>. The name conventions apply to the name fs. The angle brackets of the field symbols indicate the difference to data objects and are obligatory. You can declare field symbols in any procedure and in the global declaration section of an ABAP program, but not in the declaration section of a class or an interface. You can use a field symbol in any operand position in which it is visible and which match the typing defined using typing.
After its declaration, a field symbol is initial - that is, it does not reference a memory area. You have to assign a memory area to it (normally using the ASSIGN statement) before you can use it as an operand. Otherwise an exception will be triggered.
eg.
FIELD-SYMBOLS <fs> TYPE ANY.
DATA: BEGIN OF line,
        string1(10) VALUE '0123456789',
        string2(10) VALUE 'abcdefghij',
      END OF line.
WRITE / line-string1+5.
ASSIGN line-string1+5(*) TO <fs>.
WRITE / <fs>.
output:
56789
56789
reward if helpful
anju

Field symbol query

Hi to all,
My query is how to access a internal tables's field through field symbol.
What is the syntax and different methods to do this.
Also tell me the use of field synbol in real time.
Thanks..

hi,
check these..
http://help.sap.com/saphelp_nw2004s/helpdata/en/fc/eb3860358411d1829f0000e829fbfe/frameset.htm
http://www.sts.tu-harburg.de/teaching/sap_r3/ABAP4/field_sy.htm

How to use field symbols in dynamic select query

I have a requirement to take the table name from selection screen and get data from that table
SELECT * FROM (P_TBLNM)
INTO TABLE <ITAB>
WHERE <condition>.
I have declared field symbol as type any table , but i am getting dump saying fieldsymbol is not getting assigned .
Any pointers , please help.

Hi laxmi,
for your second question, try this one:
DATA : ref_table_des TYPE REF TO cl_abap_structdescr,
<itab> TYPE STANDARD TABLE,
<wtab> TYPE ANY,
dref TYPE REF TO DATA.
DATA: <knumh>.
ref_table_des ?= cl_abap_typedescr=>describe_by_name( P_TBLNM ).
create data dref type handle ref_table_des.
assign dref->* to <wtab>.
create data dref like standard table of <wtab>.
assign dref->* to <itab>.
SELECT * FROM (P_TBLNM)
INTO TABLE <itab>
WHERE <condition>.
LOOP AT <itab> ASSIGNING <wtab>.
assign component 'KNUMH' of structure <wtab> to <knumh>.
SELECT * FROM KONP
APPENDING TABLE GI_KONP
WHERE KNUMH = <knumh>.
ENDLOOP.
Regards,
Richard
Edited by: richard santos on Nov 17, 2009 8:16 AM

Opening query in BEx field symbol issue

Hi,
I'm facing a problem in opening BEx Analyzer 7.0.
After starting BEx and logging on to the system a "BI Server error"-popup appears mentioning that there is a problem in the communication with the BI-server and that therefore the connection to the BI-server has been broken. The detailed error is: "Field symbol has not yet been assigned".
When clicking OK and logging on for the second time there is no problem.
Does anyone know how I can solve this?
Thanks,
Michel Scheres

Hi,
Front end is not installed properly. You can contact basis team it will resolve.
Regards,
Ajay.

UrGENT-DUMP while querying database table into itab(Assigned field Symbol)

Hi,
__I am getting a dump whose description is as follows__-
"" In an SQL array select, the internal table used to hold the
selected records must be at least as wide as the database table
from which the records are being read.
In this particular case, the database table is 820 bytes wide,
but the internal table is only 814 bytes wide.""
The following code had been written:
SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-001.
PARAMETERS: p_tabl TYPE dd02l-tabname.                                      "Table Name
SELECTION-SCREEN END OF BLOCK b1.
FIELD-SYMBOLS: <fs_itab> TYPE STANDARD TABLE,
               <fs_wa> TYPE ANY,
               <fs_itab1> TYPE STANDARD TABLE,
               <fs_wa1> TYPE ANY.
FORM generate_internal_tab .
DATA: o_itab TYPE REF TO data,
        o_wa TYPE REF TO data,
        o_itab1 TYPE REF TO data,
        o_wa1 TYPE REF TO data.
CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name       = p_tabl
    CHANGING
      ct_fieldcat            = it_fcat
    EXCEPTIONS
      inconsistent_interface = 1
      program_error          = 2
      OTHERS                 = 3.
*Create Dynamic Table for it_fcat
CALL METHOD cl_alv_table_create=>create_dynamic_table
    EXPORTING
      it_fieldcatalog           = it_fcat
    IMPORTING
      ep_table                  = o_itab
    EXCEPTIONS
      generate_subpool_dir_full = 1
      OTHERS                    = 2.
IF sy-subrc EQ 0 OR o_itab IS NOT INITIAL.
    ASSIGN o_itab->* TO <fs_itab>.
    CREATE DATA o_wa LIKE LINE OF <fs_itab>.
    ASSIGN o_wa->* TO <fs_wa>.
ENDIF.
*Download the file to Application server
    SELECT *
      FROM (p_tabl)
      INTO TABLE <fs_itab>.
So i am geting a dump in placing contents of table(p_tabl) into <fs_itab>.Should the type declarations be changed???
Please give me an solution to resolve this dump.
Thanks and regards-
Sumita

You are trying to put more fields in the internal table than what is declared presently for itab. Check if one of the fields is selected but not being passed on to a internal table field.

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

Field symbols and logical databases

Hi,
How to use field symbols in an abap HR program with logical database? For most of the reports and interfaces in HR, I have used GET PERNR with logical database to fetch data from the tables. I understand that this method of programming using logical databses, is less coding and improves the performance. I am curious to know the usage of field pointers here. How does this help? Is it necessary from a performance point of view? I would like to look at an example that has LDB and field symbols used in combination. I did not find one in the threads.
Any thoughts and what do you recommend?
Thanks in advance,
VG

Field-Symbols utilize memory more efficiently.Hence Better utilization of memory better is performance.
Memory utilization is one of the factor for performance.
[LDBFIELD-SYMBOLS|https://www.sdn.sap.com/irj/scn/wiki?path=/display/snippets/generictemplatetoAccessLDB]
[Field Symbols|https://www.sdn.sap.com/irj/scn/wiki?path=/display/abap/abap%252bsyntax]
Hope this resolves your query.
Regards,
Gurpreet

Field symbols values passing as parameter to Methods

Hi ,
Can we pass fields symbols as parameter to methods ? I want to use field symbols values in my where in clause in methods, thereafter I want to pass my internal table to calling method.
Thanks,
Ujjwal

Hi,
I have create an class in which have I have create a method to written a select query to extract value from a table. The table name is passed by user. the select used is:
select * from (tab) into CORRESPONDING FIELDS OF TABLE data.
this method has 2 parameter:
tab of type sting (importing).
data of type ANY TABLE (exporting).
and i am using the following code to get the data:
data: itab TYPE TABLE OF t578w.
field-SYMBOLS <ab> TYPE any.
ASSIGN 'T578W' to <ab>.
CALL METHOD Z_GET_TABLE_DATA=>GET_TABLE " Z_GET_TABLE_DATA is the class name & GET_TABLE is method name
    EXPORTING
      tab = <ab>
    IMPORTING
      data = itab.
You can code in similar way.
I hope it helps.
Regards
Arjun
Edited by: Arjun Thakur on Apr 23, 2009 3:16 PM

ABAP Objects v/s Field Symbols

Hi,
My query is:
In ABAP Objects, reference variables can be assigned to each other.
We can also assign the reference variable to a field symbol.
Does that mean, that we can achieve the same functionality(like accessing a method of the class) using the field-symbols?
If so, why not use field-symbols instead of objects? What are the other differences?
Please provide your opinions.
Regards
s.a.k

Hi,
We can have any number of Field Symbols refering to One Variable or Object, but all these Field symbols refer to same memory location they donto have individual memory locations.
Where are in Object, if diffrent objected are created refreing to one object all the objects have diffrent memory locations.
Read the documentation of Field symbols and ABAP Objects you will get the clear diffrene.
Regards,
Kumar M.

Problem With Insert statement using field symbols with unicode enabled

I was writng a function module for dyanamic operations on the table. We are using the field symbols, function module is unicode enabled.
Assign statements are working fine, with which we created work are <fs_wa_header> and internal table <fs_tb_item> dynamically based on the table name (IM_TB_HENAME) which we get as import parameter.
we have query which is giving us dump.
INSERT (IM_TB_HENAME) FROM <FS_WA_HEADER>.

Hi
INSERT (IM_TB_HENAME) FROM <FS_WA_HEADER> is good for inserting a line in the database, so IM_TB_HENAME has to have the name of dictionary table.
U should write:
INSERT <FS_WA_HEADER> INTO (IM_TB_HENAME).
But I believe you can't use the variable IM_TB_HENAME, you should use another field-symbols:
ASSIGN (IM_TB_HNAME) TO <FS_TB_ITEM>.
INSERT <FS_WA_HEADER> INTO <FS_TB_ITEM>.
Max

FOR ALL ENTRIES... with FIELD SYMBOL

Is it possible to use FOR ALL ENTRIES with a FIELD-SYMBOL that points to a data reference of type STANDARD TABLE ?
I have the following:
SELECT * FROM mara
    INTO TABLE table
    FOR ALL ENTRIES IN another_table
    WHERE matnr EQ another_table-matnr.
The code above is what exists, (working), but I'm improving the program and one of the improvements is to allow dynamic querying by providing a field symbol instead of a hard-coded table like "another_table". But I get the message "the specified type has no structure and therefore no component called "MATNR".
My code just have the field symbol that points to a previously data reference created for a table passed as a parameter (this is working, having checked via debugging) replacing "another_table" and <fs>-matnr instead of "another_table-matnr".
What solutions would you guys suggest ?
Thanks
Avraham

Why is that that the commented line doesn't work, but under debugging I can reach <ls_items>-matnr ?
Everything is fine with <lt_items>, it contains 8 lines, and debugging shows <ls_items> receiving one line each loop pass, just as expected. I wanted to understand why/when does this error of "has no structure therefore there is no component"... appears.
LOOP AT <lt_items> INTO <ls_items>.
*    SELECT SINGLE * INTO ls_mara FROM mara WHERE mara~matnr = <ls_items>-matnr.
    IF sy-subrc = 0.
      APPEND ls_mara TO lt_mara.
    ENDIF.
ENDLOOP.

Query on field symbols

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