ABAP Select data from SAP table VKDFS 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 VKDFS 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 VKDFS. 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 VKDFS 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_VKDFS TYPE STANDARD TABLE OF VKDFS,
      WA_VKDFS TYPE VKDFS,
      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: <VKDFS> TYPE VKDFS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKDFS
*  INTO TABLE @DATA(IT_VKDFS2).
*--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_VKDFS INDEX 1 INTO DATA(WA_VKDFS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKDFS>-MANDT = 1.
<VKDFS>-FKTYP = 1.
<VKDFS>-VKORG = 1.
<VKDFS>-FKDAT = 1.
<VKDFS>-KUNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKDFS-FKART, sy-vline,
  WA_VKDFS-LLAND, sy-vline,
  WA_VKDFS-VBELN, sy-vline,
  WA_VKDFS-VBTYP, sy-vline,
  WA_VKDFS-ADRNR, sy-vline,
  WA_VKDFS-SORTKRI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKDFS 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_VKDFS 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_VKDFS INTO WA_VKDFS.


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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ADRNP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKDFS-ADRNP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKDFS-ADRNP.
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_VKDFS_STR, 
MANDT TYPE STRING,
FKTYP TYPE STRING,
VKORG TYPE STRING,
FKDAT TYPE STRING,
KUNNR TYPE STRING,
FKART TYPE STRING,
LLAND TYPE STRING,
VBELN TYPE STRING,
VBTYP TYPE STRING,
ADRNR TYPE STRING,
SORTKRI TYPE STRING,
FAKSK TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VSTEL TYPE STRING,
PDSTK TYPE STRING,
NETWR TYPE STRING,
WAERK TYPE STRING,
BDR_REF TYPE STRING,
BDR_REF_LOGSYS TYPE STRING,
DRAFT_TYPE TYPE STRING,
DBD_REF TYPE STRING,
VBART TYPE STRING,
SOLUTION_ORDER_ID TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
ADRNP TYPE STRING,
ADDR_TYPE TYPE STRING,
DUMMY_SDBILLINDEX_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKDFS_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_VKDFS_STR-MANDT sy-vline 
WA_VKDFS_STR-FKTYP sy-vline 
WA_VKDFS_STR-VKORG sy-vline 
WA_VKDFS_STR-FKDAT sy-vline 
WA_VKDFS_STR-KUNNR sy-vline 
WA_VKDFS_STR-FKART sy-vline 
WA_VKDFS_STR-LLAND sy-vline 
WA_VKDFS_STR-VBELN sy-vline 
WA_VKDFS_STR-VBTYP sy-vline 
WA_VKDFS_STR-ADRNR sy-vline 
WA_VKDFS_STR-SORTKRI sy-vline 
WA_VKDFS_STR-FAKSK sy-vline 
WA_VKDFS_STR-VTWEG sy-vline 
WA_VKDFS_STR-SPART sy-vline 
WA_VKDFS_STR-VSTEL sy-vline 
WA_VKDFS_STR-PDSTK sy-vline 
WA_VKDFS_STR-NETWR sy-vline 
WA_VKDFS_STR-WAERK sy-vline 
WA_VKDFS_STR-BDR_REF sy-vline 
WA_VKDFS_STR-BDR_REF_LOGSYS sy-vline 
WA_VKDFS_STR-DRAFT_TYPE sy-vline 
WA_VKDFS_STR-DBD_REF sy-vline 
WA_VKDFS_STR-VBART sy-vline 
WA_VKDFS_STR-SOLUTION_ORDER_ID sy-vline 
WA_VKDFS_STR-ERNAM sy-vline 
WA_VKDFS_STR-ERDAT sy-vline 
WA_VKDFS_STR-ERZET sy-vline 
WA_VKDFS_STR-ADRNP sy-vline 
WA_VKDFS_STR-ADDR_TYPE sy-vline 
WA_VKDFS_STR-DUMMY_SDBILLINDEX_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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