ABAP Select data from SAP table DVK04 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DVK04 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 DVK04. 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 DVK04 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_DVK04 TYPE STANDARD TABLE OF DVK04,
      WA_DVK04 TYPE DVK04,
      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: <DVK04> TYPE DVK04.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DVK04.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DVK04
  INTO TABLE IT_DVK04.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DVK04
*  INTO TABLE @DATA(IT_DVK042).
*--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_DVK04 INDEX 1 INTO DATA(WA_DVK042).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DVK04 ASSIGNING <DVK04>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DVK04>-MANDT_R2 = 1.
<DVK04>-SNKOM = 1.
<DVK04>-LNKOM = 1.
<DVK04>-SSKOM = 1.
<DVK04>-MANDT = 1.

ENDLOOP.

LOOP AT IT_DVK04 INTO WA_DVK04.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DVK04-VBELN, sy-vline,
  WA_DVK04-POSNR, sy-vline,
  WA_DVK04-UEPOS, sy-vline,
  WA_DVK04-MATNR, sy-vline,
  WA_DVK04-LGORT, sy-vline,
  WA_DVK04-CHARG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DVK04 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_DVK04 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_DVK04 INTO WA_DVK04.


*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_DVK04-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVK04-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_DVK04-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVK04-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DVK04-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVK04-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DVK04-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVK04-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DVK04-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVK04-GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VOLEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DVK04-VOLEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVK04-VOLEH.
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_DVK04_STR, 
MANDT_R2 TYPE STRING,
SNKOM TYPE STRING,
LNKOM TYPE STRING,
SSKOM TYPE STRING,
MANDT TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
UEPOS TYPE STRING,
MATNR TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LFIMG TYPE STRING,
UMVKZ TYPE STRING,
UMVKN TYPE STRING,
MEINS TYPE STRING,
VRKME TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
KZTLF TYPE STRING,
KCMENG TYPE STRING,
UECHA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DVK04_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_DVK04_STR-MANDT_R2 sy-vline 
WA_DVK04_STR-SNKOM sy-vline 
WA_DVK04_STR-LNKOM sy-vline 
WA_DVK04_STR-SSKOM sy-vline 
WA_DVK04_STR-MANDT sy-vline 
WA_DVK04_STR-VBELN sy-vline 
WA_DVK04_STR-POSNR sy-vline 
WA_DVK04_STR-UEPOS sy-vline 
WA_DVK04_STR-MATNR sy-vline 
WA_DVK04_STR-LGORT sy-vline 
WA_DVK04_STR-CHARG sy-vline 
WA_DVK04_STR-SOBKZ sy-vline 
WA_DVK04_STR-LFIMG sy-vline 
WA_DVK04_STR-UMVKZ sy-vline 
WA_DVK04_STR-UMVKN sy-vline 
WA_DVK04_STR-MEINS sy-vline 
WA_DVK04_STR-VRKME sy-vline 
WA_DVK04_STR-BRGEW sy-vline 
WA_DVK04_STR-NTGEW sy-vline 
WA_DVK04_STR-GEWEI sy-vline 
WA_DVK04_STR-VOLUM sy-vline 
WA_DVK04_STR-VOLEH sy-vline 
WA_DVK04_STR-KZTLF sy-vline 
WA_DVK04_STR-KCMENG sy-vline 
WA_DVK04_STR-UECHA sy-vline      INTO ld_text SEPARATED BY SPACE.

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