ABAP Select data from SAP table DFKKOPVZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKOPVZ
*  INTO TABLE @DATA(IT_DFKKOPVZ2).
*--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_DFKKOPVZ INDEX 1 INTO DATA(WA_DFKKOPVZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKOPVZ>-MANDT = 1.
<DFKKOPVZ>-OPBEL = 1.
<DFKKOPVZ>-OPUPK = 1.
<DFKKOPVZ>-OPUPW = 1.
<DFKKOPVZ>-OPUPZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKOPVZ-WAERN, sy-vline,
  WA_DFKKOPVZ-BETRN, sy-vline,
  WA_DFKKOPVZ-WAERS, sy-vline,
  WA_DFKKOPVZ-BETRW, sy-vline,
  WA_DFKKOPVZ-GBISD, sy-vline,
  WA_DFKKOPVZ-XPRUN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKOPVZ 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_DFKKOPVZ 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_DFKKOPVZ INTO WA_DFKKOPVZ.


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

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

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DFKKOPVZ-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DFKKOPVZ-GPART.
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_DFKKOPVZ_STR, 
MANDT TYPE STRING,
OPBEL TYPE STRING,
OPUPK TYPE STRING,
OPUPW TYPE STRING,
OPUPZ TYPE STRING,
WAERN TYPE STRING,
BETRN TYPE STRING,
WAERS TYPE STRING,
BETRW TYPE STRING,
GBISD TYPE STRING,
XPRUN TYPE STRING,
VKONT TYPE STRING,
GPART TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKOPVZ_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_DFKKOPVZ_STR-MANDT sy-vline 
WA_DFKKOPVZ_STR-OPBEL sy-vline 
WA_DFKKOPVZ_STR-OPUPK sy-vline 
WA_DFKKOPVZ_STR-OPUPW sy-vline 
WA_DFKKOPVZ_STR-OPUPZ sy-vline 
WA_DFKKOPVZ_STR-WAERN sy-vline 
WA_DFKKOPVZ_STR-BETRN sy-vline 
WA_DFKKOPVZ_STR-WAERS sy-vline 
WA_DFKKOPVZ_STR-BETRW sy-vline 
WA_DFKKOPVZ_STR-GBISD sy-vline 
WA_DFKKOPVZ_STR-XPRUN sy-vline 
WA_DFKKOPVZ_STR-VKONT sy-vline 
WA_DFKKOPVZ_STR-GPART sy-vline 
WA_DFKKOPVZ_STR-AENAM sy-vline 
WA_DFKKOPVZ_STR-AEDAT sy-vline 
WA_DFKKOPVZ_STR-AETIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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