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

Similar Messages

How to check the length of a field symbol value

hi all,
i have a problem with string function, i have assined table fields to a field symbol in a loop i want check the length of the assigned fields symbol value in every loop . i have written like ,,,,,len = strlen( <fs>). then i am getting the length of the field label what i ahve assigned to fiels symbol not the field value lenght ,
please advise me on this,
thanks,
sre

I think you're on the right track. This should work:
data: len type i.
data: begin of itab OCCURS 1,
 a type string value '1',
 b type string value '12',
 c type string value '123',
 end of itab.
FIELD-SYMBOLS: <fs> type ANY.
do 3 times.
assign component sy-index of STRUCTURE itab to <fs>.
len = strlen( <fs> ).
enddo.

Passing field symbol value to a variable

Hi All,
I have a value in Field Symbol declared as <FS-STATUS> TYPE STANDARD TABLE.
I want to use the value <fs-status> -low in a case statement.
For this i think i have to pass the <fs-status> -low into a variable and then use in case statement.
Can anyone explain how to pass values in field symbol to variable? Or if this is not possible is there any other solution.
Thanks in advance.

Hi ,
I have give some code sample ; just check ..
DATA: BEGIN OF line,
 col1(1) TYPE c,
 col2(1) TYPE c VALUE 'X',
 END OF line.
FIELD-SYMBOLS <fs> LIKE line.
ASSIGN line TO <fs>.
MOVE <fs>-col2 TO <fs>-col1.
WRITE: <fs>-col1, <fs>-col2.
Or u can check this link :
 http://www.erpgenie.com/abaptips/content/view/401/62/

Reg Field-Symbol value trasfer into variable

Hi,
I'm using one FIELD-SYMBOL in one of my program. I used this to catch Hotspot Fields in List Report. It catches that required field of BELNR.
I read the Click event through that FIELD-SYMBOL. Now I used
DATA: HOTSPOT(18) , "VALUE 'Document No',
 F(18), OFF TYPE I, LIN TYPE I, VAL(40), LEN TYPE I.
FIELD-SYMBOLS <FS>.
ASSIGN HOTSPOT TO <FS>.
WRITE <FS> HOTSPOT COLOR 3 INVERSE ON.
AT LINE-SELECTION.
*WINDOW STARTING AT 5 6 ENDING AT 45 20.
GET CURSOR FIELD F OFFSET OFF
LINE LIN
VALUE VAL
LENGTH LEN.
data: click_item type bsid-belnr.
move val to click_item.
It moves the value into CLICK_ITEM variable. But when I try to run SELECT query with condition BELNR = CLICK_ITEM, query gives no result.
Can you please point out my fault?
Thanks.
Kumar saurav.

Try using Conversion Routine before the Select Query.
DATA : T_BELNR TYPE BSID_BELNR.
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_INPUT'
EXPORTING
 input = CLICK_ITEM
IMPORTING
 OUTPUT = T_BELNR
and pass T_BELNR to the where condition.
Hope this helps.

Assigning field symbol to a form parameter

Hello there.
I got this huge string that concatenates several columns from a structure and I have to distribute these data into fields of a generic work area in a FORM.
The thing is that I can't find the right way to pass this work area and when I try to assign my field symbol a dump occurs.
Could anyone give me a tip?
Here is what I'm doing:
Form Nameform <how to pass?> p_workarea
loop at it_tab
 CONCATENATE 'p_table-' it_tab-fieldname INTO campo.
 ASSIGN (campo) TO <fs>.
endloop.
When I debug it, the program sees p_workarea, but when I try to see a specific field like p_workarea-kunnr, it's like it doesn't exists.

Thanks Matt,
But how do I append the values within this internal table ??
When I am using the following code:
ls_wa-fld3 = 'A'.
ls_wa-t_in-fld1 = 'B'.
ls_wa-t_in-fld2 = 'C'.
ls_wa-t_in-fld1 = 'D'.
ls_wa-t_in-fld2 = 'E'.
append ls_wa to lt_tab.
Its giving an error that:
The data object "LS_WA" does not have a component called "T_IN-FLD1".
I wanted the values to be appended in the following way in lt_tab:
fld3 fld1 fld2
A B C
 D E
Please help.

Problem with field-symbol values not updating

H i ,
 I have following piece of code :
Assigning Dynamic Table to Field Symbol
 ASSIGN ist_dyn_table->* TO <gs_dyn_table>.
* Creating Structure for dynamic table
 CREATE DATA gs_dyn_line LIKE LINE OF <gs_dyn_table>.
* Creating line type for the Dynamic Values
 ASSIGN gs_dyn_line->* TO <gs_line>.
* Populating values in the dynamic table
 LOOP AT ist_pwcl_main INTO wa_pwcl_main.
 ASSIGN COMPONENT gc_fld_werks OF STRUCTURE <gs_line> TO <gs_field>.
 1 IF sy-subrc EQ 0.
 2 <gs_field> = wa_pwcl_main-werks.
 3 ENDIF.
 5 IF <gs_field> IS ASSIGNED.
 6 <gs_field> = wa_pwcl_main-vbeln.
 ENDIF.
7 IF <gs_field> IS ASSIGNED.
8 <gs_field> = wa_pwcl_main-posnr.
 ENDIF.
 IF <gs_field> IS ASSIGNED.
 <gs_field> = wa_pwcl_main-quant.
 ENDIF.
on debugging at line 2 <gs_filed> contains the value of werks .
but at line 6 <gs_field> contains value of vbeln as 0 and at 8 of posnr as 0 .
What can be the problem ? Other values are getting assigned properly .
Plz help ...
Regards .

Hi,
Assigning Dynamic Table to Field Symbol
 ASSIGN ist_dyn_table->* TO <gs_dyn_table>.
Creating Structure for dynamic table
 CREATE DATA gs_dyn_line LIKE LINE OF <gs_dyn_table>.
Creating line type for the Dynamic Values
 ASSIGN gs_dyn_line->* TO <gs_line>.
Populating values in the dynamic table
 LOOP AT ist_pwcl_main INTO wa_pwcl_main.
 ASSIGN COMPONENT gc_fld_werks OF STRUCTURE <gs_line> TO <gs_field>.
 1 IF sy-subrc EQ 0.
 2 <gs_field> = wa_pwcl_main-werks.
 3 ENDIF.
 5 IF <gs_field> IS ASSIGNED.
 6 <gs_field> = wa_pwcl_main-vbeln.
 ENDIF.
7 IF <gs_field> IS ASSIGNED.
8 <gs_field> = wa_pwcl_main-posnr.
 ENDIF.
 IF <gs_field> IS ASSIGNED.
 <gs_field> = wa_pwcl_main-quant.
 ENDIF.
Based on your coding above, <gs_field> has been assigned with data type 'WERKS' (i'd assume component gc_fld_werks found from structure <gs_line> is a plant typed), which is a CHAR(4) data type.
Meaning, if <gs_field> is assigned with Plant type value, e.g. <gs_field> = '1000', field symbol <gs_field> will contain 4 character only.
At line 6, if wa_pwcl_main-vbeln = '0000201000', <gs_field> is only capturing '0000' only. This is also happened to line 8.
However, it looks like that <gs_field> is getting over-write if ASSIGNED statement returns SY-SUBRC = 0.
Hope this helps.
Regards,
Patrick

Field symbol value

Hi experts ,
 in FS <fs_date> i am having the date value in the type of select option structure sign , option ,low , high .
i want to move to the <fs_date>-sign to other range table . how to perform this , below is the sample code i tried .
DATA: rt_date TYPE REF TO data,
DATA:rt_dat TYPE /sdf/sel_tabtype,
FIELD-SYMBOLS: <fs_date> TYPE TABLE ,
 ASSIGN rt_date->* TO <fs_date>.
error is comming if i perform like this .
LOOP AT <fs_date> .
rt_dat-sign = <fs_date>-sign.
rt_dat-option = <fs_date>-option.
rt_dat-low = <fs_date>-low.
rt_dat-high = <fs_date>-high.
ENDLOOP.
thanks
chinnaiya P

For what you are trying to do, you don't need field symbols or dynamic data creation. But, if you insist on that path, you are missing a CREATE DATA statement. Try the following code:
DATA: rt_date TYPE REF TO data.
DATA: rt_dat TYPE /sdf/sel_tabtype.
FIELD-SYMBOLS: <fs_date> TYPE TABLE,
 <fs_row> type any.
CREATE DATA rt_date type /sdf/sel_tabtype.
ASSIGN rt_date->* TO <fs_date>.
loop at <fs_date> ASSIGNING <fs_row>.
append <fs_row> to rt_dat.
ENDLOOP.

How to pass field symbol as parameter to a method

Hi,
I have a field symbol of type table,also i have a method with parameter (say vbeln), i need to pass the range value in <fs> as the parametrs to the method.,
How can I acheive this,
A code snippet eill help me a lot.,
Thank you.
Arjun.G

Hi,
Example code :
field-symbols : <fs> type table.
CALL METHOD cl_gui_frontend_services=>gui_upload
CHANGING
 data_tab = <fs>
* EXCEPTIONS
* file_open_error = 1
* file_read_error = 2
* no_batch = 3
* gui_refuse_filetransfer = 4
* invalid_type = 5
* no_authority = 6
* unknown_error = 7
* bad_data_format = 8
* header_not_allowed = 9
* separator_not_allowed = 10
* header_too_long = 11
* unknown_dp_error = 12
* access_denied = 13
* dp_out_of_memory = 14
* disk_full = 15
* dp_timeout = 16
* not_supported_by_gui = 17
* error_no_gui = 18
* others = 19
IF sy-subrc <> 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
Remember : parameter should be of type standard table.
Regards,
Mohaiyuddin

In webdynpro ,Passing field symbols as values to class methods

Hi
Please tell me the ways of accessing database in webdynpro abap(not directly). I am calling Class method for accessing database. As currently I am directly accessing database in my webdynpro application. I have created a class and method for the same.
In my method I want to use select statement which will return table with values to webdynpro application. So for select statement(Calling Method) I need to use my field symbol values as where in clause .
Could anyone please help with example code?
Thanks,
Ujjwal

data: in_line type ref to data.
CREATE DATA in_line LIKE LINE OF <dyn_tab>.
ASSIGN in_line->* TO <dyn_wa>.
You can create a data reference and assign it to a field symbol and change the values. direclty passing field symbols is not possible.
Abhi

Is it possible to pass a field symbol as parameter from any method of view?

Hi
Is it possible to pass a field symbol as an importing parameter to teh globally declared attribute??

While it is true that you can pass field symbols, they must be fully typed at the time you pass them and they will be passed by value, not by reference. If you want to pass generically typed variables use a data reference (TYPE REF TO) instead.

Field symbol as import parameter in class method ???

Hi everyone,
is it possible to pass a field symbol as an import parameter to a method in a class? If yes, how do I define the data type of the import parameter? I'm trying to work with field symbols as the program doesn't know what kind of structure the program parameter p_srcdso has. Coding example would be something like this:
PARAMETERS: p_srcdso TYPE rsdodsobject DEFAULT '/BIC/AKVI0001'.
DATA: lr_srcpkg TYPE REF TO data.
FIELD-SYMBOLS: <fs_table> TYPE ANY TABLE.
CREATE DATA lr_srcpkg TYPE TABLE OF (p_srcdso).
ASSIGN lr_srcpkg->* TO <fs_table>.
SELECT *
FROM (p_srcdso)
INTO TABLE <fs_table>.
CALL METHOD cl_ref->create_somethign
EXPORTING
i_source_package = <fs_table>.
Thanks,
Alex

Halo Alexander,
You can use TYPE REF TO DATA( say the parameter name is i_data) as the importing parameter of the method create_somethign and inside the method you need to dereference it using data reference variable again.
data: dref type ref to data.
field-symbols: <fs_table> type table.
create data dref like i_data.
assign dref->* to <fs_table>.
Regards
Arshad

Passing unassigned field symbols to a method

Hello Gurus,
I work with a field symbol in a method and after the work is finished i have to use it i my program that i call the method from.
The problem is that the field symbol gets assigned only in the method so i can`t get the field symbol as a changing parameter in my method because it is not assigned yet.
I thought that i can return the field symbol from the method after it has been assigned, but i don`t know how. The <fs> is a dynamic itab that i created within the method.
Can anyone help please ??

Although already answered this code snippet might make it clearer
my_line is your data structure typically an itab structure.
For example
TYPES: BEGIN OF s_elements,
 tabname type DD02L-tabname,
 tabclass type dd02l-tabclass,
 as4user type dd02L-as4user,
 as4date type dd02l-as4date,
 as4time type DD02l-as4time,
 viewed(1) type c.
TYPES: END OF s_elements.
Data: my_line TYPE s_elements.
1) get the structure of your itab automatically so you can build an FCAT simply for any structure without the horrendous usual coding to manipulate and create FCATS.
CALL METHOD me->return_structure
 EXPORTING
 my_line = my_line.
You need to make a table ZOGT data available in the class definition either as an attribute if you are using the class builder SE24 or as DATA in the relevant class section.
data:
 zog LIKE LINE OF lr_rtti_struc->components .
data:
zogt LIKE TABLE OF zog .
method RETURN_STRUCTURE.
lr_rtti_struc ?= cl_abap_structdescr=>describe_by_data( my_line ).
 zogt[] = lr_rtti_struc->components.
endmethod.
Your structure details are now in table zogt.
Use this to build an FCAT.
CALL METHOD me->create_dynamic_fcat
 IMPORTING
 it_fldcat = it_fldcat.
method CREATE_DYNAMIC_FCAT.
LOOP AT zogt INTO zog.
 CLEAR wa_it_fldcat.
 wa_it_fldcat-fieldname = zog-name .
 wa_it_fldcat-datatype = zog-type_kind.
 wa_it_fldcat-inttype = zog-type_kind.
 wa_it_fldcat-intlen = zog-length.
 wa_it_fldcat-decimals = zog-decimals.
 wa_it_fldcat-coltext = zog-name.
 wa_it_fldcat-lowercase = 'X'.
 APPEND wa_it_fldcat TO it_fldcat .
 ENDLOOP.
endmethod.
Now having got your FCAT you can build your dynamic table.
 CALL METHOD me->create_dynamic_table
 EXPORTING
 it_fldcat = it_fldcat
 IMPORTING
 dy_table = dy_table.
(dy_table is defined as ref to data)
method CREATE_DYNAMIC_TABLE.
CALL METHOD cl_alv_table_create=>create_dynamic_table
 EXPORTING
 it_fieldcatalog = it_fldcat
 IMPORTING
 ep_table = dy_table.
endmethod.
Now populate your dynamic table as per sample code here
field_symbols:
<dyn_table> TYPE STANDARD TABLE.
<dyn_wa>.
data: dy_line TYPE REF TO data.
FORM populate_dynamic_itab.
ASSIGN dy_table->* TO <dyn_table>.
 CREATE DATA dy_line LIKE LINE OF <dyn_table>.
ASSIGN dy_line->* TO <dyn_wa>.
SELECT *
 FROM DD02L
 INTO CORRESPONDING FIELDS OF TABLE <dyn_table>
 WHERE TABNAME LIKE 'ZHR%'.
ENDFORM.
Now you can display your grid and process your data.
CALL METHOD z_object->display_grid
 EXPORTING
 g_outtab = <dyn_table>
 g_fldcat = it_fldcat
 i_gridtitle = i_gridtitle
 i_edit = i_edit
 i_zebra = i_zebra
 CHANGING
 it_fldcat = it_fldcat
 gt_outtab = <dyn_table>.
In the Method
method DISPLAY_GRID.
GET REFERENCE OF g_outtab INTO g_outtab1.
 GET REFERENCE OF g_fldcat INTO g_fldcat1.
 struct_grid_lset-edit = i_edit. "To enable editing
 struct_grid_LSET-zebra = i_zebra.
 struct_grid_lset-grid_title = i_gridtitle.
 struct_grid_lset-ctab_fname = 'T_CELLCOLORS'.
 struct_grid_lset-stylefname = 'CELLTAB'.
 CALL METHOD grid1->set_ready_for_input
 EXPORTING
 i_ready_for_input = '1'.
 CALL METHOD grid1->set_table_for_first_display
 EXPORTING
 is_layout = struct_grid_lset
 CHANGING
 it_outtab = gt_outtab
 it_fieldcatalog = it_fldcat.
ENDMETHOD.
You can even easily code your own column names if you so wish in the application program.
Before calling the method that displays the grid encode the following macro.
DEFINE col_name.
read table it_fldcat into wa_it_fldcat index &1.
wa_it_fldcat-coltext = &2.
wa_it_fldcat-outputlen = &3.
modify it_fldcat from wa_it_fldcat index &1.
END-OF-DEFINITION.
Then have a subroutine in your application code something like this
Form name_columns.
Here before displaying you can change the field catalog to
adjust your own column names.
*col_name col-nr 'your name' output length.
 col_name 1 'Table name' 30.
 col_name 2 'Table class' 12.
 col_name 3 'Changed By' 12.
 col_name 4 ' On' 12.
 col_name 5 ' At' 8.
 col_name 6 'Act' 3.
i_gridtitle = 'HR ESS / ITS ZHR Tables - Double click to display'.
i_zebra = 'X'.
i_edit = ' '.
endform.
Hope this clears it up a bit.
Once you get this stuff working you can re-use 99% of the code for almost any structure making the whole process of OO ALV grid applications really simple.
Yoy only need as well a standard dynpro with a custom container on it (se51).
Cheers
jimbo

Field Symbol Assignment

Hi,
I have a doubt regarding the field symbol assignment.
In my program, I have logic as below.
 W_1STCNTFLD = 'E_INV_AGING_STRU-PDISCCNTP1'.
W_2NDCNTFLD = 'E_INV_AGING_STRU-PDISCCNTP2'.
ASSIGN (W_1STCNTFLD) TO <FS1>.
ASSIGN (W_2NDCNTFLD) TO <FS2>.
While debugging, when I see the values of the Field Symbols <FS1> and <FS2> after assignment, they are 0, 0. Why is it like that..?
In general, what does a Field Symbol hold..? the value of the variable being assigned or the Memory location of that variable..?
When I remove the paranthesis while assigning like below,
ASSIGN W_1STCNTFLD TO <FS1>.
it is storing the value of the variable(E_INV_AGING_STRU-PDISCCNTP1) to <FS1> instead of '0'.
And what is the difference between ASSIGN (W_1STCNTFLD) TO <FS1> and ASSIGN W_1STCNTFLD TO <FS1>..? I mean, when we put paranthesis to the variable and when we remove the paranthesis.
Please clarify my doubts. Thanks in advance.
Thanks & Regards,
Paddu.

when you use the paranthesis,(W_1STCNTFLD) actually equals to ('E_INV_AGING_STRU-PDISCCNTP1'),and the 'E_INV_AGING_STRU-PDISCCNTP1' must be the label of a data object,it can't be a string!
please refer to the following document(coming from sap abap keywords document):
Alternative 2
... [TABLE FIELD] (name)
Alternative 3
... oref->(attr_name)
Alternative 4
... {class|(class_name)}=>{attr|(attr_name)}
Effect
There are three dynamic variants for mem_area, where the storage area is not specified directly, but as the content of character/type data objects enclosed within parentheses.
In the first variant (name), the label in name is built exacltly like the direct specification. When the statement is executed, the content of name must be the label of a data object that can contain offset/length specifications, strucuture component selectors, and component selectors for the assignment of attributes in classes or objects (since Release 6.10). The content of name must be specified in uppercase letters.
The optional addition TABLE FIELD before (name) is only possible outside of classes. This addition limits the search area - where the data object specified in (name) is searched for (see below) - to the interface work areas for the current program group declared using TABLES. If TABLE FIELD is specified, casting_spec and range_spec cannot be specified explicitly.
If the label in name is a field symbol or a form parameter with an unstructured type, components can be addressed, as of Release 6.10, through structure component selectors. The components must exist when the statement is executed.
The second variant oref->(attr_name) is a special case of the first variant for the assignment of an instance attribute to a field symbol - where the object reference variable oref is specified statically. The label of the attribute is specified dynamically in the character-type field attr_name and must not be specified in uppercase letters.
The third variant {class|(class_name)}=>{name|(attr_name)} is a special case of the first variant for the assignment of a static attribute to a field symbol where the class name class and the name of the attribute name can be specified both directly and dynamically in character-type fields class_name or attr_name. The contents of attr_name and class_name do not have to be in uppercase letters. If the class name is specified dynamically and the attribute is specified directly, no offset/length specifications can be made for the attribute.
If a data object is specified dynamically, this is searched for in accordance with the following hierarchy.
Within the local data objects of the current procedure
Within the attributes, visible in a method, of the actual class, where , in instance methods, the self reference me-> is set explicitly before the label
Within the global data of the current program
Within the interface work areas of the main program of the current program group declared with TABLES
Within the attributes of the object to which oref refers, if the label has the expression oref-> (as of Release 6.10)
Note
Only for internal use can the label in name also have the form (PROG)DOBJ, whereby PROG is the name of an ABAP program and DOBJ is the name of a global data object of this program. If the program PROG is loaded during execution of the statement ASSIGN in the same internal mode as the current program is loaded, the data object (PROG)DOBJ in this program is searched for and the field symbol points to this data object after successful assignment.
Example
Dynamic access to an attribute of an object (Dynamic Access) through a field symbol.
CLASS c1 DEFINITION.
PUBLIC SECTION.
 METHODS m1 IMPORTING oref TYPE REF TO object
 attr TYPE string.
ENDCLASS.
CLASS c1 IMPLEMENTATION.
METHOD m1.
 FIELD-SYMBOLS <attr> TYPE ANY.
 ASSIGN oref->(attr) TO <attr>.
 WRITE <attr> ...
ENDMETHOD.
ENDCLASS.

Field-symbol in user_exit

Hi,
I have access one field-symbol which is populated in satndard sap program in my user_exit.
Done some data change in that field-symbol but data is getting lost when that field-symbol is afgain moving back to sap program.
please suggest

Hi,
I am not sure about this but you can also try with the below solution.
Try to define one more field symbol of type the existing one. Before leave the user exit just pass your field symbol value to the newly created one.
Rgds,
Bujji

Move Field symbol data to Internal table

Dear All,
 Please suggest how to move field symbol data to internal table. The requirement is I have dynamic data in Field symbol which to move to table parameter of a function module.
Thanks in Advance
Rams.

Dear All,
 In need to pass tabular data i.e. multiple entries from field symbol to the table parameter of the custom function module.
Field symbol is declared as below:
FIELD-SYMBOLS: <FS_EXCEL_TAB> TYPE STANDARD TABLE,
 <FS_TABLE_HEADER> .
DATA WA_PD LIKE PRICE_DOWNLOAD.
APPEND <FS_TABLE_HEADER> TO <FS_EXCEL_TAB>.
CLEAR <FS_TABLE_HEADER>.
WA_PD-VKORG = <FS_EXCEL_TAB>-VKORG.u201D Problem while using this statement
APPEND WA_PD TO PRICE_DOWNLOAD.
 CLEAR WA_PD.
Field symbol <FS_EXCEL_TAB> is populated like this.
VKORG | KUNNR_SH | KUNNR_SP |
0015 | 102105 | 102105 |
Now I need to move this data to table in tables parameter of custom fucntion module.
Thanks in advance,
Rams

Field symbols values passing as parameter to Methods

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