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Extract table fields meta data and put to clipboard automatically

For project reason I need to fill some excel.

The content of each column comes from content in SE11:

In order to avoid such boring task, I write a small ABAP class to automate it.
This class will first read corresponding database table name based on CRM settype id, then call function module DDIF_NAMETAB_GET to get all metadata of each table field, and then send the data to clipboard.
Once done, put the focus on the first cell of content row, press Ctrl+V, all the data from clipboard will be copied into excel automatically.

The source code could be found below:

class ZCL_EXCEL_TOOL definition
  public
  final
  create public .

public section.

  methods GET_SETTYPE_FIELDS
    importing
      !IV_SETTYPE_ID type COMT_FRGTYPE_ID default 'COMM_PR_SHTEXT' .
  PROTECTED SECTION.
private section.

  types:
    BEGIN OF ty_column,
        a_index       TYPE char3,
        b_table       TYPE dd03l-tabname,
        c_fieldname   TYPE dd03l-fieldname,
        d_element     TYPE dd03l-rollname,
        e_datatype    TYPE x031l-dtyp,
        f_length      TYPE char4,
        g_description TYPE char40,
      END OF ty_column .
  types:
    tt_column TYPE STANDARD TABLE OF ty_column WITH KEY a_index b_table c_fieldname .
  types:
    BEGIN OF ty_clipdata,
        data TYPE c LENGTH 500,
      END   OF ty_clipdata .
  types:
    tt_formatted TYPE STANDARD TABLE OF ty_clipdata .

  data MT_COLUMN type TT_COLUMN .
  data MT_FORMATTED type TT_FORMATTED .
  constants C_TAB type CHAR1 value CL_ABAP_CHAR_UTILITIES=>HORIZONTAL_TAB ##NO_TEXT.

  methods CONVERT .
  methods GET_FIELD_LABEL
    importing
      !IV_TAB_NAME type DDOBJNAME
      !IV_FIELD_NAME type DFIES-FIELDNAME
    returning
      value(RV_LABEL) type STRING .
ENDCLASS.



CLASS ZCL_EXCEL_TOOL IMPLEMENTATION.


* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Private Method ZCL_EXCEL_TOOL->CONVERT
* +-------------------------------------------------------------------------------------------------+
* +--------------------------------------------------------------------------------------</SIGNATURE>
  METHOD convert.

    LOOP AT mt_column ASSIGNING FIELD-SYMBOL(<raw>).
      APPEND INITIAL LINE TO mt_formatted ASSIGNING FIELD-SYMBOL(<converted>).
      CONCATENATE <raw>-a_index <raw>-b_table <raw>-c_fieldname <raw>-d_element <raw>-e_datatype
      <raw>-f_length <raw>-g_description INTO <converted> SEPARATED BY c_tab.
    ENDLOOP.
  ENDMETHOD.


* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Private Method ZCL_EXCEL_TOOL->GET_FIELD_LABEL
* +-------------------------------------------------------------------------------------------------+
* | [--->] IV_TAB_NAME                    TYPE        DDOBJNAME
* | [--->] IV_FIELD_NAME                  TYPE        DFIES-FIELDNAME
* | [<-()] RV_LABEL                       TYPE        STRING
* +--------------------------------------------------------------------------------------</SIGNATURE>
  METHOD get_field_label.
    CALL FUNCTION 'DDIF_FIELDLABEL_GET'
      EXPORTING
        tabname   = iv_tab_name
        fieldname = iv_field_name
        langu     = sy-langu
      IMPORTING
        label     = rv_label.
  ENDMETHOD.


* <SIGNATURE>---------------------------------------------------------------------------------------+
* | Instance Public Method ZCL_EXCEL_TOOL->GET_SETTYPE_FIELDS
* +-------------------------------------------------------------------------------------------------+
* | [--->] IV_SETTYPE_ID                  TYPE        COMT_FRGTYPE_ID (default ='COMM_PR_SHTEXT')
* +--------------------------------------------------------------------------------------</SIGNATURE>
  METHOD get_settype_fields.
    DATA: lv_tab  TYPE comc_settype-frgtype_tab,
          lv_ret  TYPE int4,
          lt_list TYPE STANDARD TABLE OF x031l.

    SELECT SINGLE frgtype_tab INTO lv_tab FROM comc_settype WHERE frgtype_id = iv_settype_id.
    IF sy-subrc <> 0.
      WRITE: / 'no database table maintained for settype: ', iv_settype_id.
      RETURN.
    ENDIF.

    CALL FUNCTION 'DDIF_NAMETAB_GET'
      EXPORTING
        tabname   = CONV ddobjname( lv_tab )
        status    = 'A'
      TABLES
        x031l_tab = lt_list
      EXCEPTIONS
        not_found = 1
        OTHERS    = 2.
    IF sy-subrc <> 0.
      WRITE:/ 'table metadata parse error'.
      RETURN.
    ENDIF.

    LOOP AT lt_list ASSIGNING FIELD-SYMBOL(<list>).
      APPEND INITIAL LINE TO mt_column ASSIGNING FIELD-SYMBOL(<insert>).
      <insert>-a_index = sy-tabix.
      <insert>-b_table = lv_tab.
      <insert>-c_fieldname = <list>-fieldname.
      <insert>-d_element = <list>-rollname.
      <insert>-e_datatype = <list>-dtyp.
      <insert>-f_length = CONV i( <list>-exlength ). "cast CL_ABAP_ELEMDESCR( CL_ABAP_ELEMDESCR=>describe_by_name( <list>-rollname ) )->output_length.
      <insert>-g_description = get_field_label( EXPORTING iv_tab_name = CONV #( lv_tab ) iv_field_name = <list>-fieldname ).
    ENDLOOP.

    convert( ).
    cl_gui_frontend_services=>clipboard_export(
    EXPORTING
        no_auth_check        = abap_true
        IMPORTING
          data                 = mt_formatted
        CHANGING
          rc                   = lv_ret
        EXCEPTIONS
          cntl_error           = 1
          error_no_gui         = 2
          not_supported_by_gui = 3
      ).

  ENDMETHOD.
ENDCLASS.
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