ABAP Select data from SAP table VKONV 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 VKONV 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 VKONV. 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 VKONV 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_VKONV TYPE STANDARD TABLE OF VKONV,
      WA_VKONV TYPE VKONV,
      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: <VKONV> TYPE VKONV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VKONV
*  INTO TABLE @DATA(IT_VKONV2).
*--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_VKONV INDEX 1 INTO DATA(WA_VKONV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VKONV>-MANDT = 1.
<VKONV>-KNUMV = 1.
<VKONV>-KPOSN = 1.
<VKONV>-STUNR = 1.
<VKONV>-ZAEHK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VKONV-KAPPL, sy-vline,
  WA_VKONV-KSCHL, sy-vline,
  WA_VKONV-KDATU, sy-vline,
  WA_VKONV-KRECH, sy-vline,
  WA_VKONV-KAWRT, sy-vline,
  WA_VKONV-KBETR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VKONV 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_VKONV 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_VKONV INTO WA_VKONV.


*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 EXCRT, internal->external for field KKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_VKONV-KKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONV-KKURS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SAKN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKONV-SAKN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONV-SAKN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAKN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VKONV-SAKN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONV-SAKN2.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field KONMS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VKONV-KONMS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VKONV-KONMS.
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_VKONV_STR, 
MANDT TYPE STRING,
KNUMV TYPE STRING,
KPOSN TYPE STRING,
STUNR TYPE STRING,
ZAEHK TYPE STRING,
KAPPL TYPE STRING,
KSCHL TYPE STRING,
KDATU TYPE STRING,
KRECH TYPE STRING,
KAWRT TYPE STRING,
KBETR TYPE STRING,
WAERS TYPE STRING,
KKURS TYPE STRING,
KPEIN TYPE STRING,
KMEIN TYPE STRING,
KUMZA TYPE STRING,
KUMNE TYPE STRING,
KNTYP TYPE STRING,
KSTAT TYPE STRING,
KNPRS TYPE STRING,
KRUEK TYPE STRING,
KRELI TYPE STRING,
KHERK TYPE STRING,
KGRPE TYPE STRING,
KOUPD TYPE STRING,
KOLNR TYPE STRING,
KNUMH TYPE STRING,
KOPOS TYPE STRING,
KVSL1 TYPE STRING,
SAKN1 TYPE STRING,
MWSK1 TYPE STRING,
KVSL2 TYPE STRING,
SAKN2 TYPE STRING,
MWSK2 TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
KDIFF TYPE STRING,
KWERT TYPE STRING,
KSTEU TYPE STRING,
KINAK TYPE STRING,
KOAID TYPE STRING,
ZAEKO TYPE STRING,
KMXAW TYPE STRING,
KMXWR TYPE STRING,
KFAKTOR TYPE STRING,
KDUPL TYPE STRING,
KFAKTOR1 TYPE STRING,
KZBZG TYPE STRING,
KSTBS TYPE STRING,
KONMS TYPE STRING,
KONWS TYPE STRING,
KAWRT_K TYPE STRING,
KWAEH TYPE STRING,
KWERT_K TYPE STRING,
KFKIV TYPE STRING,
KVARC TYPE STRING,
KMPRS TYPE STRING,
PRSQU TYPE STRING,
VARCOND TYPE STRING,
STUFE TYPE STRING,
WEGXX TYPE STRING,
KTREL TYPE STRING,
MDFLG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VKONV_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_VKONV_STR-MANDT sy-vline 
WA_VKONV_STR-KNUMV sy-vline 
WA_VKONV_STR-KPOSN sy-vline 
WA_VKONV_STR-STUNR sy-vline 
WA_VKONV_STR-ZAEHK sy-vline 
WA_VKONV_STR-KAPPL sy-vline 
WA_VKONV_STR-KSCHL sy-vline 
WA_VKONV_STR-KDATU sy-vline 
WA_VKONV_STR-KRECH sy-vline 
WA_VKONV_STR-KAWRT sy-vline 
WA_VKONV_STR-KBETR sy-vline 
WA_VKONV_STR-WAERS sy-vline 
WA_VKONV_STR-KKURS sy-vline 
WA_VKONV_STR-KPEIN sy-vline 
WA_VKONV_STR-KMEIN sy-vline 
WA_VKONV_STR-KUMZA sy-vline 
WA_VKONV_STR-KUMNE sy-vline 
WA_VKONV_STR-KNTYP sy-vline 
WA_VKONV_STR-KSTAT sy-vline 
WA_VKONV_STR-KNPRS sy-vline 
WA_VKONV_STR-KRUEK sy-vline 
WA_VKONV_STR-KRELI sy-vline 
WA_VKONV_STR-KHERK sy-vline 
WA_VKONV_STR-KGRPE sy-vline 
WA_VKONV_STR-KOUPD sy-vline 
WA_VKONV_STR-KOLNR sy-vline 
WA_VKONV_STR-KNUMH sy-vline 
WA_VKONV_STR-KOPOS sy-vline 
WA_VKONV_STR-KVSL1 sy-vline 
WA_VKONV_STR-SAKN1 sy-vline 
WA_VKONV_STR-MWSK1 sy-vline 
WA_VKONV_STR-KVSL2 sy-vline 
WA_VKONV_STR-SAKN2 sy-vline 
WA_VKONV_STR-MWSK2 sy-vline 
WA_VKONV_STR-LIFNR sy-vline 
WA_VKONV_STR-KUNNR sy-vline 
WA_VKONV_STR-KDIFF sy-vline 
WA_VKONV_STR-KWERT sy-vline 
WA_VKONV_STR-KSTEU sy-vline 
WA_VKONV_STR-KINAK sy-vline 
WA_VKONV_STR-KOAID sy-vline 
WA_VKONV_STR-ZAEKO sy-vline 
WA_VKONV_STR-KMXAW sy-vline 
WA_VKONV_STR-KMXWR sy-vline 
WA_VKONV_STR-KFAKTOR sy-vline 
WA_VKONV_STR-KDUPL sy-vline 
WA_VKONV_STR-KFAKTOR1 sy-vline 
WA_VKONV_STR-KZBZG sy-vline 
WA_VKONV_STR-KSTBS sy-vline 
WA_VKONV_STR-KONMS sy-vline 
WA_VKONV_STR-KONWS sy-vline 
WA_VKONV_STR-KAWRT_K sy-vline 
WA_VKONV_STR-KWAEH sy-vline 
WA_VKONV_STR-KWERT_K sy-vline 
WA_VKONV_STR-KFKIV sy-vline 
WA_VKONV_STR-KVARC sy-vline 
WA_VKONV_STR-KMPRS sy-vline 
WA_VKONV_STR-PRSQU sy-vline 
WA_VKONV_STR-VARCOND sy-vline 
WA_VKONV_STR-STUFE sy-vline 
WA_VKONV_STR-WEGXX sy-vline 
WA_VKONV_STR-KTREL sy-vline 
WA_VKONV_STR-MDFLG sy-vline      INTO ld_text SEPARATED BY SPACE.

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