topic get field name from dynamic structure in Application Development and Automation Discussions

get field name from dynamic structure

Former Member — Thu, 25 Feb 2010 04:12:09 GMT

I have a dynamic structure of a dynamic table. I want to loop thru table and check if there is field name 'ABC' exist in the structure. If it exists, depending on value of the field I will change value of another field in the structure.

For example if field struct-fieldname = 'ABC ' and field value = 'S', I will display field XYZ (struct-xyz) as positive, otherwise display as negative. Can this be achieved using dynamic structure and dynamic table via field symbol? Thanks

Re: get field name from dynamic structure

Former Member — Thu, 25 Feb 2010 05:26:49 GMT

hello ,

try like this

data:

ls_comp type abap_componentdescr,

ls_stru type ref to cl_abap_structdescr,

lt_comp type standard table of abap_componentdescr.

ls_stru ?= cl_abap_typedescr=>describe_by_data(<FS1>).

lt_comp = ls_stru->get_components( ).

internal table lt_comp with have both field name , values as well.

loop at lt_comp into ls_comp.

ls_comp-name -->fieldname

assign component sy-tabix

of structure i_copaitem

to <fs_value>.--->fieldvalue

endloop.

regards

Prabhu

Re: get field name from dynamic structure

Former Member — Wed, 10 Mar 2010 11:57:36 GMT

Hi,

you can use the below code snippet

FIELD-SYMBOLS : <lv_value> TYPE any.

ASSIGN COMPONENT 'ABC' of STRUCTURE struc to <lv_value>.

IF sy-subrc = 0.

IF <lv_value> IS INITIAL.

ENDIF.

This will read the value of field 'ABC' from your structure to <lv_value>

Re: get field name from dynamic structure

Former Member — Thu, 11 Mar 2010 09:05:13 GMT

Hi,

You can try this



DATA:       tb_struct TYPE REF TO cl_abap_structdescr,
      tb_comp   TYPE        abap_component_tab.

* Populate the fields of wa_pc_model_data2
  tb_struct ?=
  cl_abap_typedescr=>describe_by_data( wa_pc_model_data2 ).

  LOOP AT tb_struct->components ASSIGNING <fs_components>.
    wf_var1 = <fs_components>-name.

    PERFORM fill_fields  USING    wf_var1
                                  wa_pc_model_data2
                         CHANGING wf_update_coc.
    CLEAR: wf_var1.
  ENDLOOP.

  CLEAR tb_struct.
  UNASSIGN: <fs_components>,
            <fs>,
            <fs_name>.


FORM fill_fields USING    pf_wf_var1
                          pf_wa_pc_data_field
                 CHANGING pf_wf_update_coc.

** Assign the component of the structure to the field symbol
  ASSIGN COMPONENT pf_wf_var1
    OF STRUCTURE pf_wa_pc_data_field TO <fs_name>.
  IF sy-subrc  = 0.

    ASSIGN COMPONENT pf_wf_var1
      OF STRUCTURE wa_coc_tech TO <fs>.
    IF sy-subrc = 0.

** Check if the IDOC data is filled
** Also check if the IDOC and database table data are same
      IF NOT <fs_name> IS INITIAL AND  "IDOC data
         <fs_name> NE <fs>.    "IDOC data NE database table data
        <fs> = <fs_name>.      "Update database field from IDOC field
        pf_wf_update_coc = 'X'. "Set the flag
      ENDIF.
    ENDIF.
  ENDIF.

ENDFORM.                    " fill_fields

Re: get field name from dynamic structure

Former Member — Thu, 11 Mar 2010 14:19:01 GMT

Thanks, but your code gave me compilation errors due to no data definition for: <fs_components>

If I declare <fs_components> as any,

there will be no component name <fs_components>-name.

Also what is wf_var1, wf_update_coc?

Anyway, I solved the problem. I just loop at the dynamic structure check if the component field name 'XXX' and 'YYY' exist, if both field name exist,

then I can change value via command

assign component 'XXX' of structure <fs> to <fval>.

assign component 'YYY' of structure <fs> to <fval2>.

if <fval> = 'H'.

<fval2> = <fval2> * - 1.

endif.

thanks all for your help.

Re: get field name from dynamic structure

jayesh_mudaliar — Tue, 17 Mar 2020 15:42:37 GMT

Hi Valerie,

Glad to hear you solved this issue but for those who are not aware you can declare <fs_components> as <fs_components> type abap_compdescr.

You can declare lv_name as string.

lv_name = <fs_components>-name.

So here in LV_NAME you will get the feild name of any dynamic Structure. Now using Assign Component you can get the values from the structure.

Regards,

Jayesh