ABAP Select data from SAP table VAKPA 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 VAKPA 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 VAKPA. 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 VAKPA 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_VAKPA TYPE STANDARD TABLE OF VAKPA,
      WA_VAKPA TYPE VAKPA,
      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: <VAKPA> TYPE VAKPA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VAKPA
*  INTO TABLE @DATA(IT_VAKPA2).
*--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_VAKPA INDEX 1 INTO DATA(WA_VAKPA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VAKPA>-MANDT = 1.
<VAKPA>-KUNDE = 1.
<VAKPA>-PARVW = 1.
<VAKPA>-VKORG = 1.
<VAKPA>-TRVOG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VAKPA-AUDAT, sy-vline,
  WA_VAKPA-VKBUR, sy-vline,
  WA_VAKPA-VKGRP, sy-vline,
  WA_VAKPA-VTWEG, sy-vline,
  WA_VAKPA-SPART, sy-vline,
  WA_VAKPA-AUART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VAKPA 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_VAKPA 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_VAKPA INTO WA_VAKPA.


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

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_VAKPA-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VAKPA-PARVW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AUART, internal->external for field AUART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_VAKPA-AUART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VAKPA-AUART.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field OIPBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VAKPA-OIPBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VAKPA-OIPBL.
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_VAKPA_STR, 
MANDT TYPE STRING,
KUNDE TYPE STRING,
PARVW TYPE STRING,
VKORG TYPE STRING,
TRVOG TYPE STRING,
AUDAT TYPE STRING,
VKBUR TYPE STRING,
VKGRP TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
AUART TYPE STRING,
BSTNK TYPE STRING,
KUNNR TYPE STRING,
ERNAM TYPE STRING,
VBELN TYPE STRING,
ADRNR_AG TYPE STRING,
ADRNR TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
OIPBL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VAKPA_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_VAKPA_STR-MANDT sy-vline 
WA_VAKPA_STR-KUNDE sy-vline 
WA_VAKPA_STR-PARVW sy-vline 
WA_VAKPA_STR-VKORG sy-vline 
WA_VAKPA_STR-TRVOG sy-vline 
WA_VAKPA_STR-AUDAT sy-vline 
WA_VAKPA_STR-VKBUR sy-vline 
WA_VAKPA_STR-VKGRP sy-vline 
WA_VAKPA_STR-VTWEG sy-vline 
WA_VAKPA_STR-SPART sy-vline 
WA_VAKPA_STR-AUART sy-vline 
WA_VAKPA_STR-BSTNK sy-vline 
WA_VAKPA_STR-KUNNR sy-vline 
WA_VAKPA_STR-ERNAM sy-vline 
WA_VAKPA_STR-VBELN sy-vline 
WA_VAKPA_STR-ADRNR_AG sy-vline 
WA_VAKPA_STR-ADRNR sy-vline 
WA_VAKPA_STR-DATAB sy-vline 
WA_VAKPA_STR-DATBI sy-vline 
WA_VAKPA_STR-OIPBL sy-vline      INTO ld_text SEPARATED BY SPACE.

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