ABAP Select data from SAP table KV02V into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KV02V 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 KV02V. 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 KV02V 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_KV02V TYPE STANDARD TABLE OF KV02V,
      WA_KV02V TYPE KV02V,
      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: <KV02V> TYPE KV02V.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KV02V.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KV02V
  INTO TABLE IT_KV02V.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KV02V
*  INTO TABLE @DATA(IT_KV02V2).
*--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_KV02V INDEX 1 INTO DATA(WA_KV02V2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KV02V ASSIGNING <KV02V>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KV02V>-MEINH = 1.
<KV02V>-MEGBTR = 1.
<KV02V>-WAERSK = 1.
<KV02V>-WKGBTR = 1.
<KV02V>-WKFBTR = 1.

ENDLOOP.

LOOP AT IT_KV02V INTO WA_KV02V.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KV02V-WAERSB, sy-vline,
  WA_KV02V-WBGBTR, sy-vline,
  WA_KV02V-WBFBTR, sy-vline,
  WA_KV02V-WAERSO, sy-vline,
  WA_KV02V-WOGBTR, sy-vline,
  WA_KV02V-WOFBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KV02V 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_KV02V 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_KV02V INTO WA_KV02V.


*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 CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KV02V-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02V-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINHM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KV02V-MEINHM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02V-MEINHM.
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_KV02V_STR, 
MEINH TYPE STRING,
MEGBTR TYPE STRING,
WAERSK TYPE STRING,
WKGBTR TYPE STRING,
WKFBTR TYPE STRING,
WAERSB TYPE STRING,
WBGBTR TYPE STRING,
WBFBTR TYPE STRING,
WAERSO TYPE STRING,
WOGBTR TYPE STRING,
WOFBTR TYPE STRING,
MEINHM TYPE STRING,
MEGBTM TYPE STRING,
WAERMK TYPE STRING,
WKGBTM TYPE STRING,
WKFBTM TYPE STRING,
WAERMB TYPE STRING,
WBGBTM TYPE STRING,
WBFBTM TYPE STRING,
WAERMO TYPE STRING,
WOGBTM TYPE STRING,
WOFBTM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KV02V_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_KV02V_STR-MEINH sy-vline 
WA_KV02V_STR-MEGBTR sy-vline 
WA_KV02V_STR-WAERSK sy-vline 
WA_KV02V_STR-WKGBTR sy-vline 
WA_KV02V_STR-WKFBTR sy-vline 
WA_KV02V_STR-WAERSB sy-vline 
WA_KV02V_STR-WBGBTR sy-vline 
WA_KV02V_STR-WBFBTR sy-vline 
WA_KV02V_STR-WAERSO sy-vline 
WA_KV02V_STR-WOGBTR sy-vline 
WA_KV02V_STR-WOFBTR sy-vline 
WA_KV02V_STR-MEINHM sy-vline 
WA_KV02V_STR-MEGBTM sy-vline 
WA_KV02V_STR-WAERMK sy-vline 
WA_KV02V_STR-WKGBTM sy-vline 
WA_KV02V_STR-WKFBTM sy-vline 
WA_KV02V_STR-WAERMB sy-vline 
WA_KV02V_STR-WBGBTM sy-vline 
WA_KV02V_STR-WBFBTM sy-vline 
WA_KV02V_STR-WAERMO sy-vline 
WA_KV02V_STR-WOGBTM sy-vline 
WA_KV02V_STR-WOFBTM sy-vline      INTO ld_text SEPARATED BY SPACE.

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