ABAP Select data from SAP table KOMK2_VV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KOMK2_VV 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 KOMK2_VV. 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 KOMK2_VV 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_KOMK2_VV TYPE STANDARD TABLE OF KOMK2_VV,
      WA_KOMK2_VV TYPE KOMK2_VV,
      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: <KOMK2_VV> TYPE KOMK2_VV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KOMK2_VV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KOMK2_VV
  INTO TABLE IT_KOMK2_VV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMK2_VV
*  INTO TABLE @DATA(IT_KOMK2_VV2).
*--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_KOMK2_VV INDEX 1 INTO DATA(WA_KOMK2_VV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KOMK2_VV ASSIGNING <KOMK2_VV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMK2_VV>-VERTT = 1.
<KOMK2_VV>-VERTN = 1.
<KOMK2_VV>-VBEWA = 1.
<KOMK2_VV>-HKONT = 1.
<KOMK2_VV>-ZLSPR = 1.

ENDLOOP.

LOOP AT IT_KOMK2_VV INTO WA_KOMK2_VV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMK2_VV-REGUL, sy-vline,
  WA_KOMK2_VV-STCD1, sy-vline,
  WA_KOMK2_VV-PSTLZ, sy-vline,
  WA_KOMK2_VV-PSTL2, sy-vline,
  WA_KOMK2_VV-PSKTO, sy-vline,
  WA_KOMK2_VV-PFACH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMK2_VV 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_KOMK2_VV 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_KOMK2_VV INTO WA_KOMK2_VV.


*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 VERTN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_VV-VERTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_VV-VERTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMK2_VV-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMK2_VV-HKONT.
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_KOMK2_VV_STR, 
VERTT TYPE STRING,
VERTN TYPE STRING,
VBEWA TYPE STRING,
HKONT TYPE STRING,
ZLSPR TYPE STRING,
REGUL TYPE STRING,
STCD1 TYPE STRING,
PSTLZ TYPE STRING,
PSTL2 TYPE STRING,
PSKTO TYPE STRING,
PFACH TYPE STRING,
ORT01 TYPE STRING,
STRAS TYPE STRING,
STKZU TYPE STRING,
STKZA TYPE STRING,
REGIO TYPE STRING,
BKONT TYPE STRING,
BANKS TYPE STRING,
BANKN TYPE STRING,
BANKL TYPE STRING,
LAND1 TYPE STRING,
EMPFG TYPE STRING,
DTAWS TYPE STRING,
DTAMS TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
BVTYP TYPE STRING,
HBKID TYPE STRING,
ZINKZ TYPE STRING,
PERNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMK2_VV_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_KOMK2_VV_STR-VERTT sy-vline 
WA_KOMK2_VV_STR-VERTN sy-vline 
WA_KOMK2_VV_STR-VBEWA sy-vline 
WA_KOMK2_VV_STR-HKONT sy-vline 
WA_KOMK2_VV_STR-ZLSPR sy-vline 
WA_KOMK2_VV_STR-REGUL sy-vline 
WA_KOMK2_VV_STR-STCD1 sy-vline 
WA_KOMK2_VV_STR-PSTLZ sy-vline 
WA_KOMK2_VV_STR-PSTL2 sy-vline 
WA_KOMK2_VV_STR-PSKTO sy-vline 
WA_KOMK2_VV_STR-PFACH sy-vline 
WA_KOMK2_VV_STR-ORT01 sy-vline 
WA_KOMK2_VV_STR-STRAS sy-vline 
WA_KOMK2_VV_STR-STKZU sy-vline 
WA_KOMK2_VV_STR-STKZA sy-vline 
WA_KOMK2_VV_STR-REGIO sy-vline 
WA_KOMK2_VV_STR-BKONT sy-vline 
WA_KOMK2_VV_STR-BANKS sy-vline 
WA_KOMK2_VV_STR-BANKN sy-vline 
WA_KOMK2_VV_STR-BANKL sy-vline 
WA_KOMK2_VV_STR-LAND1 sy-vline 
WA_KOMK2_VV_STR-EMPFG sy-vline 
WA_KOMK2_VV_STR-DTAWS sy-vline 
WA_KOMK2_VV_STR-DTAMS sy-vline 
WA_KOMK2_VV_STR-NAME1 sy-vline 
WA_KOMK2_VV_STR-NAME2 sy-vline 
WA_KOMK2_VV_STR-NAME3 sy-vline 
WA_KOMK2_VV_STR-NAME4 sy-vline 
WA_KOMK2_VV_STR-BVTYP sy-vline 
WA_KOMK2_VV_STR-HBKID sy-vline 
WA_KOMK2_VV_STR-ZINKZ sy-vline 
WA_KOMK2_VV_STR-PERNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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