ABAP Select data from SAP table VKKS0 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VKKS0 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 VKKS0. 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 VKKS0 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_VKKS0 TYPE STANDARD TABLE OF VKKS0,
      WA_VKKS0 TYPE VKKS0,
      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: <VKKS0> TYPE VKKS0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VKKS0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VKKS0
  INTO TABLE IT_VKKS0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKKS0
*  INTO TABLE @DATA(IT_VKKS02).
*--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_VKKS0 INDEX 1 INTO DATA(WA_VKKS02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VKKS0 ASSIGNING <VKKS0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKKS0>-MANDT = 1.
<VKKS0>-AUFNR = 1.
<VKKS0>-POSNR = 1.
<VKKS0>-OBJNR = 1.
<VKKS0>-PKOSA = 1.

ENDLOOP.

LOOP AT IT_VKKS0 INTO WA_VKKS0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKKS0-KOKRS, sy-vline,
  WA_VKKS0-WERKS, sy-vline,
  WA_VKKS0-AUART, sy-vline,
  WA_VKKS0-AUTYP, sy-vline,
  WA_VKKS0-ERDAT, sy-vline,
  WA_VKKS0-BUKRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKKS0 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_VKKS0 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_VKKS0 INTO WA_VKKS0.


*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 AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKS0-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKS0-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PKOSA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKS0-PKOSA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKS0-PKOSA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LAUFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKS0-LAUFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKS0-LAUFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_VKKS0-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKS0-PROJN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKS0-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKS0-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_VKKS0-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKS0-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKS0-SAFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKS0-SAFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MAUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKS0-MAUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKS0-MAUFNR.
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_VKKS0_STR, 
MANDT TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
OBJNR TYPE STRING,
PKOSA TYPE STRING,
KOKRS TYPE STRING,
WERKS TYPE STRING,
AUART TYPE STRING,
AUTYP TYPE STRING,
ERDAT TYPE STRING,
BUKRS TYPE STRING,
WAERS TYPE STRING,
IDAT2 TYPE STRING,
LOEKZ TYPE STRING,
AWSLS TYPE STRING,
ABGSL TYPE STRING,
MLTPS TYPE STRING,
PROCNR TYPE STRING,
PROTY TYPE STRING,
GSBER TYPE STRING,
AUFPL TYPE STRING,
PRNET TYPE STRING,
CPROC TYPE STRING,
LAUFN TYPE STRING,
PWERK TYPE STRING,
PROJN TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KZBWS TYPE STRING,
SOBKZ TYPE STRING,
MATNR TYPE STRING,
LTRMI TYPE STRING,
ELIKZ TYPE STRING,
SAFNR TYPE STRING,
VERID TYPE STRING,
RTP01 TYPE STRING,
RTP02 TYPE STRING,
RTP03 TYPE STRING,
OBJNP TYPE STRING,
FXPRU TYPE STRING,
MAUFNR TYPE STRING,
SPLSTAT TYPE STRING,
EB_POST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKKS0_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_VKKS0_STR-MANDT sy-vline 
WA_VKKS0_STR-AUFNR sy-vline 
WA_VKKS0_STR-POSNR sy-vline 
WA_VKKS0_STR-OBJNR sy-vline 
WA_VKKS0_STR-PKOSA sy-vline 
WA_VKKS0_STR-KOKRS sy-vline 
WA_VKKS0_STR-WERKS sy-vline 
WA_VKKS0_STR-AUART sy-vline 
WA_VKKS0_STR-AUTYP sy-vline 
WA_VKKS0_STR-ERDAT sy-vline 
WA_VKKS0_STR-BUKRS sy-vline 
WA_VKKS0_STR-WAERS sy-vline 
WA_VKKS0_STR-IDAT2 sy-vline 
WA_VKKS0_STR-LOEKZ sy-vline 
WA_VKKS0_STR-AWSLS sy-vline 
WA_VKKS0_STR-ABGSL sy-vline 
WA_VKKS0_STR-MLTPS sy-vline 
WA_VKKS0_STR-PROCNR sy-vline 
WA_VKKS0_STR-PROTY sy-vline 
WA_VKKS0_STR-GSBER sy-vline 
WA_VKKS0_STR-AUFPL sy-vline 
WA_VKKS0_STR-PRNET sy-vline 
WA_VKKS0_STR-CPROC sy-vline 
WA_VKKS0_STR-LAUFN sy-vline 
WA_VKKS0_STR-PWERK sy-vline 
WA_VKKS0_STR-PROJN sy-vline 
WA_VKKS0_STR-KDAUF sy-vline 
WA_VKKS0_STR-KDPOS sy-vline 
WA_VKKS0_STR-KZBWS sy-vline 
WA_VKKS0_STR-SOBKZ sy-vline 
WA_VKKS0_STR-MATNR sy-vline 
WA_VKKS0_STR-LTRMI sy-vline 
WA_VKKS0_STR-ELIKZ sy-vline 
WA_VKKS0_STR-SAFNR sy-vline 
WA_VKKS0_STR-VERID sy-vline 
WA_VKKS0_STR-RTP01 sy-vline 
WA_VKKS0_STR-RTP02 sy-vline 
WA_VKKS0_STR-RTP03 sy-vline 
WA_VKKS0_STR-OBJNP sy-vline 
WA_VKKS0_STR-FXPRU sy-vline 
WA_VKKS0_STR-MAUFNR sy-vline 
WA_VKKS0_STR-SPLSTAT sy-vline 
WA_VKKS0_STR-EB_POST sy-vline      INTO ld_text SEPARATED BY SPACE.

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