ABAP Select data from SAP table VKKKANKO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKKKANKO
*  INTO TABLE @DATA(IT_VKKKANKO2).
*--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_VKKKANKO INDEX 1 INTO DATA(WA_VKKKANKO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKKKANKO>-ACODE = 1.
<VKKKANKO>-MANDT = 1.
<VKKKANKO>-OPBUK = 1.
<VKKKANKO>-VKTYP = 1.
<VKKKANKO>-VKONT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKKKANKO-RBZNR, sy-vline,
  WA_VKKKANKO-RBART, sy-vline,
  WA_VKKKANKO-RRBZN, sy-vline,
  WA_VKKKANKO-RRBAR, sy-vline,
  WA_VKKKANKO-VKPBZ, sy-vline,
  WA_VKKKANKO-GPART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKKKANKO 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_VKKKANKO 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_VKKKANKO INTO WA_VKKKANKO.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field EKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKKKANKO-EKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKKKANKO-EKONT.
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_VKKKANKO_STR, 
ACODE TYPE STRING,
MANDT TYPE STRING,
OPBUK TYPE STRING,
VKTYP TYPE STRING,
VKONT TYPE STRING,
RBZNR TYPE STRING,
RBART TYPE STRING,
RRBZN TYPE STRING,
RRBAR TYPE STRING,
VKPBZ TYPE STRING,
GPART TYPE STRING,
ABWRH TYPE STRING,
ABWRE TYPE STRING,
ABWRA TYPE STRING,
EZAWE TYPE STRING,
EBVTY TYPE STRING,
EKONT TYPE STRING,
ABART TYPE STRING,
AZAWE TYPE STRING,
ABVTY TYPE STRING,
VTRST TYPE STRING,
ABGRD TYPE STRING,
EXRYT TYPE STRING,
DEXBT TYPE STRING,
LNDSL TYPE STRING,
EARNB TYPE STRING,
EARRH TYPE STRING,
EARRE TYPE STRING,
EARRA TYPE STRING,
STOPD TYPE STRING,
STOPG TYPE STRING,
BEGRU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKKKANKO_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_VKKKANKO_STR-ACODE sy-vline 
WA_VKKKANKO_STR-MANDT sy-vline 
WA_VKKKANKO_STR-OPBUK sy-vline 
WA_VKKKANKO_STR-VKTYP sy-vline 
WA_VKKKANKO_STR-VKONT sy-vline 
WA_VKKKANKO_STR-RBZNR sy-vline 
WA_VKKKANKO_STR-RBART sy-vline 
WA_VKKKANKO_STR-RRBZN sy-vline 
WA_VKKKANKO_STR-RRBAR sy-vline 
WA_VKKKANKO_STR-VKPBZ sy-vline 
WA_VKKKANKO_STR-GPART sy-vline 
WA_VKKKANKO_STR-ABWRH sy-vline 
WA_VKKKANKO_STR-ABWRE sy-vline 
WA_VKKKANKO_STR-ABWRA sy-vline 
WA_VKKKANKO_STR-EZAWE sy-vline 
WA_VKKKANKO_STR-EBVTY sy-vline 
WA_VKKKANKO_STR-EKONT sy-vline 
WA_VKKKANKO_STR-ABART sy-vline 
WA_VKKKANKO_STR-AZAWE sy-vline 
WA_VKKKANKO_STR-ABVTY sy-vline 
WA_VKKKANKO_STR-VTRST sy-vline 
WA_VKKKANKO_STR-ABGRD sy-vline 
WA_VKKKANKO_STR-EXRYT sy-vline 
WA_VKKKANKO_STR-DEXBT sy-vline 
WA_VKKKANKO_STR-LNDSL sy-vline 
WA_VKKKANKO_STR-EARNB sy-vline 
WA_VKKKANKO_STR-EARRH sy-vline 
WA_VKKKANKO_STR-EARRE sy-vline 
WA_VKKKANKO_STR-EARRA sy-vline 
WA_VKKKANKO_STR-STOPD sy-vline 
WA_VKKKANKO_STR-STOPG sy-vline 
WA_VKKKANKO_STR-BEGRU sy-vline      INTO ld_text SEPARATED BY SPACE.

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