ABAP Select data from SAP table FKK_S_DIFFERENCE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKK_S_DIFFERENCE
*  INTO TABLE @DATA(IT_FKK_S_DIFFERENCE2).
*--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_FKK_S_DIFFERENCE INDEX 1 INTO DATA(WA_FKK_S_DIFFERENCE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKK_S_DIFFERENCE>-AMPEL = 1.
<FKK_S_DIFFERENCE>-VBELN = 1.
<FKK_S_DIFFERENCE>-FKART = 1.
<FKK_S_DIFFERENCE>-FKDAT = 1.
<FKK_S_DIFFERENCE>-VKONT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKK_S_DIFFERENCE-FKK_DOCSTAT, sy-vline,
  WA_FKK_S_DIFFERENCE-SAKNN, sy-vline,
  WA_FKK_S_DIFFERENCE-LANDTX, sy-vline,
  WA_FKK_S_DIFFERENCE-LAND1, sy-vline,
  WA_FKK_S_DIFFERENCE-MWSKZ, sy-vline,
  WA_FKK_S_DIFFERENCE-KVSLN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKK_S_DIFFERENCE 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_FKK_S_DIFFERENCE 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_FKK_S_DIFFERENCE INTO WA_FKK_S_DIFFERENCE.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKK_S_DIFFERENCE-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKK_S_DIFFERENCE-VBELN.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKK_S_DIFFERENCE-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKK_S_DIFFERENCE-AWSYS.
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_FKK_S_DIFFERENCE_STR, 
AMPEL TYPE STRING,
VBELN TYPE STRING,
FKART TYPE STRING,
FKDAT TYPE STRING,
VKONT TYPE STRING,
FKK_DOCSTAT TYPE STRING,
SAKNN TYPE STRING,
LANDTX TYPE STRING,
LAND1 TYPE STRING,
MWSKZ TYPE STRING,
KVSLN TYPE STRING,
KWERT TYPE STRING,
BETRW TYPE STRING,
DIFF TYPE STRING,
WAERK TYPE STRING,
OPBEL TYPE STRING,
INVDOC TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VKORG TYPE STRING,
AWSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKK_S_DIFFERENCE_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_FKK_S_DIFFERENCE_STR-AMPEL sy-vline 
WA_FKK_S_DIFFERENCE_STR-VBELN sy-vline 
WA_FKK_S_DIFFERENCE_STR-FKART sy-vline 
WA_FKK_S_DIFFERENCE_STR-FKDAT sy-vline 
WA_FKK_S_DIFFERENCE_STR-VKONT sy-vline 
WA_FKK_S_DIFFERENCE_STR-FKK_DOCSTAT sy-vline 
WA_FKK_S_DIFFERENCE_STR-SAKNN sy-vline 
WA_FKK_S_DIFFERENCE_STR-LANDTX sy-vline 
WA_FKK_S_DIFFERENCE_STR-LAND1 sy-vline 
WA_FKK_S_DIFFERENCE_STR-MWSKZ sy-vline 
WA_FKK_S_DIFFERENCE_STR-KVSLN sy-vline 
WA_FKK_S_DIFFERENCE_STR-KWERT sy-vline 
WA_FKK_S_DIFFERENCE_STR-BETRW sy-vline 
WA_FKK_S_DIFFERENCE_STR-DIFF sy-vline 
WA_FKK_S_DIFFERENCE_STR-WAERK sy-vline 
WA_FKK_S_DIFFERENCE_STR-OPBEL sy-vline 
WA_FKK_S_DIFFERENCE_STR-INVDOC sy-vline 
WA_FKK_S_DIFFERENCE_STR-VTWEG sy-vline 
WA_FKK_S_DIFFERENCE_STR-SPART sy-vline 
WA_FKK_S_DIFFERENCE_STR-VKORG sy-vline 
WA_FKK_S_DIFFERENCE_STR-AWSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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