ABAP Select data from SAP table DVKTX 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 DVKTX 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 DVKTX. 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 DVKTX 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_DVKTX TYPE STANDARD TABLE OF DVKTX,
      WA_DVKTX TYPE DVKTX,
      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: <DVKTX> TYPE DVKTX.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DVKTX
*  INTO TABLE @DATA(IT_DVKTX2).
*--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_DVKTX INDEX 1 INTO DATA(WA_DVKTX2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DVKTX-POSNR, sy-vline,
  WA_DVKTX-SPRAS, sy-vline,
  WA_DVKTX-TEXT1, sy-vline,
  WA_DVKTX-TEXT2, sy-vline,
  WA_DVKTX-TEXT3, sy-vline,
  WA_DVKTX-TEXT4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DVKTX 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_DVKTX 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_DVKTX INTO WA_DVKTX.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DVKTX-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DVKTX-SPRAS.
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_DVKTX_STR, 
MANDT TYPE STRING,
SNKOM TYPE STRING,
LNKOM TYPE STRING,
SSKOM TYPE STRING,
TXART TYPE STRING,
POSNR TYPE STRING,
SPRAS TYPE STRING,
TEXT1 TYPE STRING,
TEXT2 TYPE STRING,
TEXT3 TYPE STRING,
TEXT4 TYPE STRING,
TEXT5 TYPE STRING,
TEXT6 TYPE STRING,
TEXT7 TYPE STRING,
TEXT8 TYPE STRING,
TEXT9 TYPE STRING,
TEXT10 TYPE STRING,
TEXT11 TYPE STRING,
TEXT12 TYPE STRING,
TEXT13 TYPE STRING,
TEXT14 TYPE STRING,
TEXT15 TYPE STRING,
TEXT16 TYPE STRING,
TEXT17 TYPE STRING,
TEXT18 TYPE STRING,
TEXT19 TYPE STRING,
TEXT20 TYPE STRING,
TEXT21 TYPE STRING,
TEXT22 TYPE STRING,
TEXT23 TYPE STRING,
TEXT24 TYPE STRING,
TEXT25 TYPE STRING,
TEXT26 TYPE STRING,
TEXT27 TYPE STRING,
TEXT28 TYPE STRING,
TEXT29 TYPE STRING,
TEXT30 TYPE STRING,
TEXT31 TYPE STRING,
TEXT32 TYPE STRING,
TEXT33 TYPE STRING,
TEXT34 TYPE STRING,
TEXT35 TYPE STRING,
TEXT36 TYPE STRING,
TEXT37 TYPE STRING,
TEXT38 TYPE STRING,
TEXT39 TYPE STRING,
TEXT40 TYPE STRING,
TEXT41 TYPE STRING,
TEXT42 TYPE STRING,
TEXT43 TYPE STRING,
TEXT44 TYPE STRING,
TEXT45 TYPE STRING,
TEXT46 TYPE STRING,
TEXT47 TYPE STRING,
TEXT48 TYPE STRING,
TEXT49 TYPE STRING,
TEXT50 TYPE STRING,
TEXT51 TYPE STRING,
TEXT52 TYPE STRING,
TEXT53 TYPE STRING,
TEXT54 TYPE STRING,
TEXT55 TYPE STRING,
TEXT56 TYPE STRING,
TEXT57 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DVKTX_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_DVKTX_STR-MANDT sy-vline 
WA_DVKTX_STR-SNKOM sy-vline 
WA_DVKTX_STR-LNKOM sy-vline 
WA_DVKTX_STR-SSKOM sy-vline 
WA_DVKTX_STR-TXART sy-vline 
WA_DVKTX_STR-POSNR sy-vline 
WA_DVKTX_STR-SPRAS sy-vline 
WA_DVKTX_STR-TEXT1 sy-vline 
WA_DVKTX_STR-TEXT2 sy-vline 
WA_DVKTX_STR-TEXT3 sy-vline 
WA_DVKTX_STR-TEXT4 sy-vline 
WA_DVKTX_STR-TEXT5 sy-vline 
WA_DVKTX_STR-TEXT6 sy-vline 
WA_DVKTX_STR-TEXT7 sy-vline 
WA_DVKTX_STR-TEXT8 sy-vline 
WA_DVKTX_STR-TEXT9 sy-vline 
WA_DVKTX_STR-TEXT10 sy-vline 
WA_DVKTX_STR-TEXT11 sy-vline 
WA_DVKTX_STR-TEXT12 sy-vline 
WA_DVKTX_STR-TEXT13 sy-vline 
WA_DVKTX_STR-TEXT14 sy-vline 
WA_DVKTX_STR-TEXT15 sy-vline 
WA_DVKTX_STR-TEXT16 sy-vline 
WA_DVKTX_STR-TEXT17 sy-vline 
WA_DVKTX_STR-TEXT18 sy-vline 
WA_DVKTX_STR-TEXT19 sy-vline 
WA_DVKTX_STR-TEXT20 sy-vline 
WA_DVKTX_STR-TEXT21 sy-vline 
WA_DVKTX_STR-TEXT22 sy-vline 
WA_DVKTX_STR-TEXT23 sy-vline 
WA_DVKTX_STR-TEXT24 sy-vline 
WA_DVKTX_STR-TEXT25 sy-vline 
WA_DVKTX_STR-TEXT26 sy-vline 
WA_DVKTX_STR-TEXT27 sy-vline 
WA_DVKTX_STR-TEXT28 sy-vline 
WA_DVKTX_STR-TEXT29 sy-vline 
WA_DVKTX_STR-TEXT30 sy-vline 
WA_DVKTX_STR-TEXT31 sy-vline 
WA_DVKTX_STR-TEXT32 sy-vline 
WA_DVKTX_STR-TEXT33 sy-vline 
WA_DVKTX_STR-TEXT34 sy-vline 
WA_DVKTX_STR-TEXT35 sy-vline 
WA_DVKTX_STR-TEXT36 sy-vline 
WA_DVKTX_STR-TEXT37 sy-vline 
WA_DVKTX_STR-TEXT38 sy-vline 
WA_DVKTX_STR-TEXT39 sy-vline 
WA_DVKTX_STR-TEXT40 sy-vline 
WA_DVKTX_STR-TEXT41 sy-vline 
WA_DVKTX_STR-TEXT42 sy-vline 
WA_DVKTX_STR-TEXT43 sy-vline 
WA_DVKTX_STR-TEXT44 sy-vline 
WA_DVKTX_STR-TEXT45 sy-vline 
WA_DVKTX_STR-TEXT46 sy-vline 
WA_DVKTX_STR-TEXT47 sy-vline 
WA_DVKTX_STR-TEXT48 sy-vline 
WA_DVKTX_STR-TEXT49 sy-vline 
WA_DVKTX_STR-TEXT50 sy-vline 
WA_DVKTX_STR-TEXT51 sy-vline 
WA_DVKTX_STR-TEXT52 sy-vline 
WA_DVKTX_STR-TEXT53 sy-vline 
WA_DVKTX_STR-TEXT54 sy-vline 
WA_DVKTX_STR-TEXT55 sy-vline 
WA_DVKTX_STR-TEXT56 sy-vline 
WA_DVKTX_STR-TEXT57 sy-vline      INTO ld_text SEPARATED BY SPACE.

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