ABAP Select data from SAP table KV02C into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KV02C 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 KV02C. 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 KV02C 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_KV02C TYPE STANDARD TABLE OF KV02C,
      WA_KV02C TYPE KV02C,
      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: <KV02C> TYPE KV02C.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KV02C.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KV02C
  INTO TABLE IT_KV02C.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KV02C
*  INTO TABLE @DATA(IT_KV02C2).
*--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_KV02C INDEX 1 INTO DATA(WA_KV02C2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KV02C ASSIGNING <KV02C>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KV02C>-MATNR = 1.
<KV02C>-WERKS = 1.
<KV02C>-PWERK = 1.
<KV02C>-AUFNR = 1.
<KV02C>-POSNR = 1.

ENDLOOP.

LOOP AT IT_KV02C INTO WA_KV02C.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KV02C-KDAUF, sy-vline,
  WA_KV02C-KDPOS, sy-vline,
  WA_KV02C-PROJN, sy-vline,
  WA_KV02C-PROCNR, sy-vline,
  WA_KV02C-BWTAR, sy-vline,
  WA_KV02C-SOBKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KV02C 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_KV02C 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_KV02C INTO WA_KV02C.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KV02C-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02C-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02C-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02C-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02C-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02C-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PROJN
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_KV02C-PROJN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02C-PROJN.
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_KV02C_STR, 
MATNR TYPE STRING,
WERKS TYPE STRING,
PWERK TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PROJN TYPE STRING,
PROCNR TYPE STRING,
BWTAR TYPE STRING,
SOBKZ TYPE STRING,
KLVAR TYPE STRING,
KLVAS TYPE STRING,
TVERS TYPE STRING,
AKDAT TYPE STRING,
FXPRU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KV02C_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_KV02C_STR-MATNR sy-vline 
WA_KV02C_STR-WERKS sy-vline 
WA_KV02C_STR-PWERK sy-vline 
WA_KV02C_STR-AUFNR sy-vline 
WA_KV02C_STR-POSNR sy-vline 
WA_KV02C_STR-KDAUF sy-vline 
WA_KV02C_STR-KDPOS sy-vline 
WA_KV02C_STR-PROJN sy-vline 
WA_KV02C_STR-PROCNR sy-vline 
WA_KV02C_STR-BWTAR sy-vline 
WA_KV02C_STR-SOBKZ sy-vline 
WA_KV02C_STR-KLVAR sy-vline 
WA_KV02C_STR-KLVAS sy-vline 
WA_KV02C_STR-TVERS sy-vline 
WA_KV02C_STR-AKDAT sy-vline 
WA_KV02C_STR-FXPRU sy-vline      INTO ld_text SEPARATED BY SPACE.

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