ABAP Select data from SAP table RCBUN_DG_SELFIELDS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCBUN_DG_SELFIELDS table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to RCBUN_DG_SELFIELDS. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the RCBUN_DG_SELFIELDS table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_RCBUN_DG_SELFIELDS TYPE STANDARD TABLE OF RCBUN_DG_SELFIELDS,
      WA_RCBUN_DG_SELFIELDS TYPE RCBUN_DG_SELFIELDS,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <RCBUN_DG_SELFIELDS> TYPE RCBUN_DG_SELFIELDS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RCBUN_DG_SELFIELDS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RCBUN_DG_SELFIELDS
  INTO TABLE IT_RCBUN_DG_SELFIELDS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCBUN_DG_SELFIELDS
*  INTO TABLE @DATA(IT_RCBUN_DG_SELFIELDS2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_RCBUN_DG_SELFIELDS INDEX 1 INTO DATA(WA_RCBUN_DG_SELFIELDS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RCBUN_DG_SELFIELDS ASSIGNING <RCBUN_DG_SELFIELDS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCBUN_DG_SELFIELDS>-LWDG = 1.
<RCBUN_DG_SELFIELDS>-UNSUBID = 1.
<RCBUN_DG_SELFIELDS>-DPOT = 1.
<RCBUN_DG_SELFIELDS>-HISUBID = 1.
<RCBUN_DG_SELFIELDS>-HISCAT = 1.

ENDLOOP.

LOOP AT IT_RCBUN_DG_SELFIELDS INTO WA_RCBUN_DG_SELFIELDS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCBUN_DG_SELFIELDS-NOTXTPATT, sy-vline,
  WA_RCBUN_DG_SELFIELDS-HNU, sy-vline,
  WA_RCBUN_DG_SELFIELDS-PIN, sy-vline,
  WA_RCBUN_DG_SELFIELDS-DGTA, sy-vline,
  WA_RCBUN_DG_SELFIELDS-MOS, sy-vline,
  WA_RCBUN_DG_SELFIELDS-ADMOS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCBUN_DG_SELFIELDS you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_RCBUN_DG_SELFIELDS TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_RCBUN_DG_SELFIELDS INTO WA_RCBUN_DG_SELFIELDS.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit SPEC1, internal->external for field UNSUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_RCBUN_DG_SELFIELDS-UNSUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCBUN_DG_SELFIELDS-UNSUBID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SPEC1, internal->external for field HISUBID
CALL FUNCTION 'CONVERSION_EXIT_SPEC1_OUTPUT'
  EXPORTING
    input =                      WA_RCBUN_DG_SELFIELDS-HISUBID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCBUN_DG_SELFIELDS-HISUBID.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_RCBUN_DG_SELFIELDS_STR, 
LWDG TYPE STRING,
UNSUBID TYPE STRING,
DPOT TYPE STRING,
HISUBID TYPE STRING,
HISCAT TYPE STRING,
NOTXTPATT TYPE STRING,
HNU TYPE STRING,
PIN TYPE STRING,
DGTA TYPE STRING,
MOS TYPE STRING,
ADMOS TYPE STRING,
PACOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCBUN_DG_SELFIELDS_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_RCBUN_DG_SELFIELDS_STR-LWDG sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-UNSUBID sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-DPOT sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-HISUBID sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-HISCAT sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-NOTXTPATT sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-HNU sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-PIN sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-DGTA sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-MOS sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-ADMOS sy-vline 
WA_RCBUN_DG_SELFIELDS_STR-PACOD sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.