ABAP Select data from SAP table KV02G into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KV02G 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 KV02G. 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 KV02G 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_KV02G TYPE STANDARD TABLE OF KV02G,
      WA_KV02G TYPE KV02G,
      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: <KV02G> TYPE KV02G.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KV02G.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KV02G
  INTO TABLE IT_KV02G.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KV02G
*  INTO TABLE @DATA(IT_KV02G2).
*--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_KV02G INDEX 1 INTO DATA(WA_KV02G2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KV02G ASSIGNING <KV02G>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KV02G>-KOKRS = 1.
<KV02G>-CWAER = 1.
<KV02G>-KTOPL = 1.
<KV02G>-LMONA = 1.
<KV02G>-OBJNR = 1.

ENDLOOP.

LOOP AT IT_KV02G INTO WA_KV02G.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KV02G-OBART, sy-vline,
  WA_KV02G-AUFNR, sy-vline,
  WA_KV02G-POSNR, sy-vline,
  WA_KV02G-AUTYP, sy-vline,
  WA_KV02G-AUART, sy-vline,
  WA_KV02G-MLTPS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KV02G 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_KV02G 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_KV02G INTO WA_KV02G.


*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 AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-SAFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-SAFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-KOSTV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-KOSTV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-MEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-MEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWVRS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-AWVRS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-AWVRS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFVS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-REFVS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-REFVS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWVSB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-AWVSB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-AWVSB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWVSV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-AWVSV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-AWVSV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-VERSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WRTTP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KV02G-WRTTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KV02G-WRTTP.
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_KV02G_STR, 
KOKRS TYPE STRING,
CWAER TYPE STRING,
KTOPL TYPE STRING,
LMONA TYPE STRING,
OBJNR TYPE STRING,
OBART TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
AUTYP TYPE STRING,
AUART TYPE STRING,
MLTPS TYPE STRING,
SAFNR TYPE STRING,
BUKRS TYPE STRING,
WAERS TYPE STRING,
KOSTV TYPE STRING,
KURST TYPE STRING,
PRCTR TYPE STRING,
GSBER TYPE STRING,
SPART TYPE STRING,
WERKS TYPE STRING,
OWAER TYPE STRING,
MENGE TYPE STRING,
MEINH TYPE STRING,
LOSGR TYPE STRING,
MEINS TYPE STRING,
NOTOK TYPE STRING,
AWVRS TYPE STRING,
AFWIP TYPE STRING,
AFSCP TYPE STRING,
AFCTL TYPE STRING,
AFOUT TYPE STRING,
AFSTL TYPE STRING,
VALTY TYPE STRING,
REFVS TYPE STRING,
WIPDF TYPE STRING,
ABWDF TYPE STRING,
ACTDF TYPE STRING,
PLNDF TYPE STRING,
DELTA TYPE STRING,
AWVSB TYPE STRING,
AWVSV TYPE STRING,
VERSN TYPE STRING,
WRTTP TYPE STRING,
TABPX TYPE STRING,
PLFKO TYPE STRING,
PLAKO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KV02G_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_KV02G_STR-KOKRS sy-vline 
WA_KV02G_STR-CWAER sy-vline 
WA_KV02G_STR-KTOPL sy-vline 
WA_KV02G_STR-LMONA sy-vline 
WA_KV02G_STR-OBJNR sy-vline 
WA_KV02G_STR-OBART sy-vline 
WA_KV02G_STR-AUFNR sy-vline 
WA_KV02G_STR-POSNR sy-vline 
WA_KV02G_STR-AUTYP sy-vline 
WA_KV02G_STR-AUART sy-vline 
WA_KV02G_STR-MLTPS sy-vline 
WA_KV02G_STR-SAFNR sy-vline 
WA_KV02G_STR-BUKRS sy-vline 
WA_KV02G_STR-WAERS sy-vline 
WA_KV02G_STR-KOSTV sy-vline 
WA_KV02G_STR-KURST sy-vline 
WA_KV02G_STR-PRCTR sy-vline 
WA_KV02G_STR-GSBER sy-vline 
WA_KV02G_STR-SPART sy-vline 
WA_KV02G_STR-WERKS sy-vline 
WA_KV02G_STR-OWAER sy-vline 
WA_KV02G_STR-MENGE sy-vline 
WA_KV02G_STR-MEINH sy-vline 
WA_KV02G_STR-LOSGR sy-vline 
WA_KV02G_STR-MEINS sy-vline 
WA_KV02G_STR-NOTOK sy-vline 
WA_KV02G_STR-AWVRS sy-vline 
WA_KV02G_STR-AFWIP sy-vline 
WA_KV02G_STR-AFSCP sy-vline 
WA_KV02G_STR-AFCTL sy-vline 
WA_KV02G_STR-AFOUT sy-vline 
WA_KV02G_STR-AFSTL sy-vline 
WA_KV02G_STR-VALTY sy-vline 
WA_KV02G_STR-REFVS sy-vline 
WA_KV02G_STR-WIPDF sy-vline 
WA_KV02G_STR-ABWDF sy-vline 
WA_KV02G_STR-ACTDF sy-vline 
WA_KV02G_STR-PLNDF sy-vline 
WA_KV02G_STR-DELTA sy-vline 
WA_KV02G_STR-AWVSB sy-vline 
WA_KV02G_STR-AWVSV sy-vline 
WA_KV02G_STR-VERSN sy-vline 
WA_KV02G_STR-WRTTP sy-vline 
WA_KV02G_STR-TABPX sy-vline 
WA_KV02G_STR-PLFKO sy-vline 
WA_KV02G_STR-PLAKO sy-vline      INTO ld_text SEPARATED BY SPACE.

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