ABAP Select data from SAP table RFKC4_1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFKC4_1 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 RFKC4_1. 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 RFKC4_1 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_RFKC4_1 TYPE STANDARD TABLE OF RFKC4_1,
      WA_RFKC4_1 TYPE RFKC4_1,
      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: <RFKC4_1> TYPE RFKC4_1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFKC4_1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFKC4_1
  INTO TABLE IT_RFKC4_1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFKC4_1
*  INTO TABLE @DATA(IT_RFKC4_12).
*--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_RFKC4_1 INDEX 1 INTO DATA(WA_RFKC4_12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFKC4_1 ASSIGNING <RFKC4_1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFKC4_1>-XMARK = 1.
<RFKC4_1>-XEDIT = 1.
<RFKC4_1>-STAT_I = 1.
<RFKC4_1>-GPART = 1.
<RFKC4_1>-VKONT = 1.

ENDLOOP.

LOOP AT IT_RFKC4_1 INTO WA_RFKC4_1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFKC4_1-VTREF, sy-vline,
  WA_RFKC4_1-SUBAP, sy-vline,
  WA_RFKC4_1-PPACC, sy-vline,
  WA_RFKC4_1-VKTID, sy-vline,
  WA_RFKC4_1-VTREF_I, sy-vline,
  WA_RFKC4_1-VKBEZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFKC4_1 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_RFKC4_1 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_RFKC4_1 INTO WA_RFKC4_1.


*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 ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKC4_1-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKC4_1-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKC4_1-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKC4_1-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKC4_1-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKC4_1-VTREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PPACC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKC4_1-PPACC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKC4_1-PPACC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABWRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKC4_1-ABWRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKC4_1-ABWRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABWRA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKC4_1-ABWRA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKC4_1-ABWRA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPARV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKC4_1-GPARV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKC4_1-GPARV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFKC4_1-VKONV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFKC4_1-VKONV.
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_RFKC4_1_STR, 
XMARK TYPE STRING,
XEDIT TYPE STRING,
STAT_I TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
SUBAP TYPE STRING,
PPACC TYPE STRING,
VKTID TYPE STRING,
VTREF_I TYPE STRING,
VKBEZ TYPE STRING,
ABWRE TYPE STRING,
PPPTB TYPE STRING,
EZAWE TYPE STRING,
EZASP TYPE STRING,
EBVTY TYPE STRING,
EBVTX TYPE STRING,
MNDID TYPE STRING,
CCARD_ID TYPE STRING,
CCITX TYPE STRING,
ABWRA TYPE STRING,
AZAWE TYPE STRING,
AZASP TYPE STRING,
ABVTY TYPE STRING,
ABVTX TYPE STRING,
CCARD_OUT TYPE STRING,
CCOTX TYPE STRING,
ABWR_I TYPE STRING,
ABWZV_I TYPE STRING,
EZASP_I TYPE STRING,
AZASP_I TYPE STRING,
ABWGP_I TYPE STRING,
FUTUR_I TYPE STRING,
FUTUR TYPE STRING,
GPARV_I TYPE STRING,
GPARV TYPE STRING,
VKONV TYPE STRING,
OPBUK TYPE STRING,
PYBUK TYPE STRING,
STDBK TYPE STRING,
OBJ1X_X TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFKC4_1_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_RFKC4_1_STR-XMARK sy-vline 
WA_RFKC4_1_STR-XEDIT sy-vline 
WA_RFKC4_1_STR-STAT_I sy-vline 
WA_RFKC4_1_STR-GPART sy-vline 
WA_RFKC4_1_STR-VKONT sy-vline 
WA_RFKC4_1_STR-VTREF sy-vline 
WA_RFKC4_1_STR-SUBAP sy-vline 
WA_RFKC4_1_STR-PPACC sy-vline 
WA_RFKC4_1_STR-VKTID sy-vline 
WA_RFKC4_1_STR-VTREF_I sy-vline 
WA_RFKC4_1_STR-VKBEZ sy-vline 
WA_RFKC4_1_STR-ABWRE sy-vline 
WA_RFKC4_1_STR-PPPTB sy-vline 
WA_RFKC4_1_STR-EZAWE sy-vline 
WA_RFKC4_1_STR-EZASP sy-vline 
WA_RFKC4_1_STR-EBVTY sy-vline 
WA_RFKC4_1_STR-EBVTX sy-vline 
WA_RFKC4_1_STR-MNDID sy-vline 
WA_RFKC4_1_STR-CCARD_ID sy-vline 
WA_RFKC4_1_STR-CCITX sy-vline 
WA_RFKC4_1_STR-ABWRA sy-vline 
WA_RFKC4_1_STR-AZAWE sy-vline 
WA_RFKC4_1_STR-AZASP sy-vline 
WA_RFKC4_1_STR-ABVTY sy-vline 
WA_RFKC4_1_STR-ABVTX sy-vline 
WA_RFKC4_1_STR-CCARD_OUT sy-vline 
WA_RFKC4_1_STR-CCOTX sy-vline 
WA_RFKC4_1_STR-ABWR_I sy-vline 
WA_RFKC4_1_STR-ABWZV_I sy-vline 
WA_RFKC4_1_STR-EZASP_I sy-vline 
WA_RFKC4_1_STR-AZASP_I sy-vline 
WA_RFKC4_1_STR-ABWGP_I sy-vline 
WA_RFKC4_1_STR-FUTUR_I sy-vline 
WA_RFKC4_1_STR-FUTUR sy-vline 
WA_RFKC4_1_STR-GPARV_I sy-vline 
WA_RFKC4_1_STR-GPARV sy-vline 
WA_RFKC4_1_STR-VKONV sy-vline 
WA_RFKC4_1_STR-OPBUK sy-vline 
WA_RFKC4_1_STR-PYBUK sy-vline 
WA_RFKC4_1_STR-STDBK sy-vline 
WA_RFKC4_1_STR-OBJ1X_X sy-vline      INTO ld_text SEPARATED BY SPACE.

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