ABAP Select data from SAP table KV02F into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KV02F 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 KV02F. 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 KV02F 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_KV02F TYPE STANDARD TABLE OF KV02F,
      WA_KV02F TYPE KV02F,
      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: <KV02F> TYPE KV02F.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KV02F.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KV02F
  INTO TABLE IT_KV02F.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KV02F
*  INTO TABLE @DATA(IT_KV02F2).
*--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_KV02F INDEX 1 INTO DATA(WA_KV02F2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KV02F ASSIGNING <KV02F>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KV02F>-KALNR = 1.
<KV02F>-KLVAR = 1.
<KV02F>-ELEHK = 1.
<KV02F>-MAFLG = 1.
<KV02F>-OPFLG = 1.

ENDLOOP.

LOOP AT IT_KV02F INTO WA_KV02F.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KV02F-CSFLG, sy-vline,
  WA_KV02F-SPFLG, sy-vline,
  WA_KV02F-PLDAT, sy-vline,
  WA_KV02F-AUSID, sy-vline,
  WA_KV02F-APROZ, sy-vline,
  WA_KV02F-PRCTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KV02F 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_KV02F 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_KV02F INTO WA_KV02F.


*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 PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02F-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02F-PRCTR.
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_KV02F_STR, 
KALNR TYPE STRING,
KLVAR TYPE STRING,
ELEHK TYPE STRING,
MAFLG TYPE STRING,
OPFLG TYPE STRING,
CSFLG TYPE STRING,
SPFLG TYPE STRING,
PLDAT TYPE STRING,
AUSID TYPE STRING,
APROZ TYPE STRING,
PRCTR TYPE STRING,
GSBER TYPE STRING,
KURST TYPE STRING,
SPART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KV02F_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_KV02F_STR-KALNR sy-vline 
WA_KV02F_STR-KLVAR sy-vline 
WA_KV02F_STR-ELEHK sy-vline 
WA_KV02F_STR-MAFLG sy-vline 
WA_KV02F_STR-OPFLG sy-vline 
WA_KV02F_STR-CSFLG sy-vline 
WA_KV02F_STR-SPFLG sy-vline 
WA_KV02F_STR-PLDAT sy-vline 
WA_KV02F_STR-AUSID sy-vline 
WA_KV02F_STR-APROZ sy-vline 
WA_KV02F_STR-PRCTR sy-vline 
WA_KV02F_STR-GSBER sy-vline 
WA_KV02F_STR-KURST sy-vline 
WA_KV02F_STR-SPART sy-vline      INTO ld_text SEPARATED BY SPACE.

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