ABAP Select data from SAP table DVK01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DVK01 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 DVK01. 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 DVK01 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_DVK01 TYPE STANDARD TABLE OF DVK01,
      WA_DVK01 TYPE DVK01,
      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: <DVK01> TYPE DVK01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DVK01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DVK01
  INTO TABLE IT_DVK01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DVK01
*  INTO TABLE @DATA(IT_DVK012).
*--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_DVK01 INDEX 1 INTO DATA(WA_DVK012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DVK01 ASSIGNING <DVK01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DVK01>-MANDT = 1.
<DVK01>-SNKOM = 1.
<DVK01>-LNKOM = 1.
<DVK01>-SSKOM = 1.
<DVK01>-KUNNR = 1.

ENDLOOP.

LOOP AT IT_DVK01 INTO WA_DVK01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DVK01-ANRED, sy-vline,
  WA_DVK01-NAME1, sy-vline,
  WA_DVK01-NAME2, sy-vline,
  WA_DVK01-NAME3, sy-vline,
  WA_DVK01-NAME4, sy-vline,
  WA_DVK01-STRAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DVK01 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_DVK01 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_DVK01 INTO WA_DVK01.


*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_DVK01-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVK01-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DVK01-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVK01-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SPDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DVK01-SPDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVK01-SPDNR.
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_DVK01_STR, 
MANDT TYPE STRING,
SNKOM TYPE STRING,
LNKOM TYPE STRING,
SSKOM TYPE STRING,
KUNNR TYPE STRING,
ANRED TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
STRAS TYPE STRING,
LAND1 TYPE STRING,
PSTLZ TYPE STRING,
PSTL2 TYPE STRING,
ORT01 TYPE STRING,
ORT02 TYPE STRING,
REGIO TYPE STRING,
PFACH TYPE STRING,
TELF1 TYPE STRING,
SPRAS TYPE STRING,
LZONE TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VSTEL TYPE STRING,
LFART TYPE STRING,
COMMN TYPE STRING,
VERUR TYPE STRING,
WADAT TYPE STRING,
LIFSP TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
SPDNR TYPE STRING,
AUTLF TYPE STRING,
ANZPK TYPE STRING,
ABLAD TYPE STRING,
VSBED TYPE STRING,
LPRIO TYPE STRING,
INCPO TYPE STRING,
TOURN TYPE STRING,
TOURT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DVK01_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_DVK01_STR-MANDT sy-vline 
WA_DVK01_STR-SNKOM sy-vline 
WA_DVK01_STR-LNKOM sy-vline 
WA_DVK01_STR-SSKOM sy-vline 
WA_DVK01_STR-KUNNR sy-vline 
WA_DVK01_STR-ANRED sy-vline 
WA_DVK01_STR-NAME1 sy-vline 
WA_DVK01_STR-NAME2 sy-vline 
WA_DVK01_STR-NAME3 sy-vline 
WA_DVK01_STR-NAME4 sy-vline 
WA_DVK01_STR-STRAS sy-vline 
WA_DVK01_STR-LAND1 sy-vline 
WA_DVK01_STR-PSTLZ sy-vline 
WA_DVK01_STR-PSTL2 sy-vline 
WA_DVK01_STR-ORT01 sy-vline 
WA_DVK01_STR-ORT02 sy-vline 
WA_DVK01_STR-REGIO sy-vline 
WA_DVK01_STR-PFACH sy-vline 
WA_DVK01_STR-TELF1 sy-vline 
WA_DVK01_STR-SPRAS sy-vline 
WA_DVK01_STR-LZONE sy-vline 
WA_DVK01_STR-VKORG sy-vline 
WA_DVK01_STR-VTWEG sy-vline 
WA_DVK01_STR-SPART sy-vline 
WA_DVK01_STR-VSTEL sy-vline 
WA_DVK01_STR-LFART sy-vline 
WA_DVK01_STR-COMMN sy-vline 
WA_DVK01_STR-VERUR sy-vline 
WA_DVK01_STR-WADAT sy-vline 
WA_DVK01_STR-LIFSP sy-vline 
WA_DVK01_STR-ERNAM sy-vline 
WA_DVK01_STR-ERDAT sy-vline 
WA_DVK01_STR-ERZET sy-vline 
WA_DVK01_STR-SPDNR sy-vline 
WA_DVK01_STR-AUTLF sy-vline 
WA_DVK01_STR-ANZPK sy-vline 
WA_DVK01_STR-ABLAD sy-vline 
WA_DVK01_STR-VSBED sy-vline 
WA_DVK01_STR-LPRIO sy-vline 
WA_DVK01_STR-INCPO sy-vline 
WA_DVK01_STR-TOURN sy-vline 
WA_DVK01_STR-TOURT sy-vline      INTO ld_text SEPARATED BY SPACE.

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