ABAP Select data from SAP table CKMLDUVNCO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKMLDUVNCO
*  INTO TABLE @DATA(IT_CKMLDUVNCO2).
*--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_CKMLDUVNCO INDEX 1 INTO DATA(WA_CKMLDUVNCO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKMLDUVNCO>-MANDT = 1.
<CKMLDUVNCO>-IBLNR = 1.
<CKMLDUVNCO>-GJAHR = 1.
<CKMLDUVNCO>-ZEILI = 1.
<CKMLDUVNCO>-POSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKMLDUVNCO-MEINS, sy-vline,
  WA_CKMLDUVNCO-MENGE_VERB, sy-vline,
  WA_CKMLDUVNCO-MENGE_PROG, sy-vline,
  WA_CKMLDUVNCO-MENGE, sy-vline,
  WA_CKMLDUVNCO-MBLNR, sy-vline,
  WA_CKMLDUVNCO-MJAHR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKMLDUVNCO 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_CKMLDUVNCO 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_CKMLDUVNCO INTO WA_CKMLDUVNCO.


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

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUVNCO-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUVNCO-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUVNCO-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUVNCO-MJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit GJAHR, internal->external for field MJAHR_REV
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUVNCO-MJAHR_REV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUVNCO-MJAHR_REV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS2
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUVNCO-MEINS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUVNCO-MEINS2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUVNCO-MBLNR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUVNCO-MBLNR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR2
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUVNCO-MJAHR2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUVNCO-MJAHR2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR2_REV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUVNCO-MBLNR2_REV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUVNCO-MBLNR2_REV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field MJAHR2_REV
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUVNCO-MJAHR2_REV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUVNCO-MJAHR2_REV.
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_CKMLDUVNCO_STR, 
MANDT TYPE STRING,
IBLNR TYPE STRING,
GJAHR TYPE STRING,
ZEILI TYPE STRING,
POSNR TYPE STRING,
MEINS TYPE STRING,
MENGE_VERB TYPE STRING,
MENGE_PROG TYPE STRING,
MENGE TYPE STRING,
MBLNR TYPE STRING,
MJAHR TYPE STRING,
ZEILE TYPE STRING,
DISTRIB TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
KALNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
KSTRG TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
OBJNR TYPE STRING,
AUF_MATNR TYPE STRING,
PKOSA TYPE STRING,
MAN_POS TYPE STRING,
BWART_ORIG TYPE STRING,
MBLNR_REV TYPE STRING,
MJAHR_REV TYPE STRING,
ZEILE_REV TYPE STRING,
MENG2 TYPE STRING,
MEINS2 TYPE STRING,
MENG2_PROG TYPE STRING,
MBLNR2 TYPE STRING,
MJAHR2 TYPE STRING,
ZEILE2 TYPE STRING,
MBLNR2_REV TYPE STRING,
MJAHR2_REV TYPE STRING,
ZEILE2_REV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKMLDUVNCO_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_CKMLDUVNCO_STR-MANDT sy-vline 
WA_CKMLDUVNCO_STR-IBLNR sy-vline 
WA_CKMLDUVNCO_STR-GJAHR sy-vline 
WA_CKMLDUVNCO_STR-ZEILI sy-vline 
WA_CKMLDUVNCO_STR-POSNR sy-vline 
WA_CKMLDUVNCO_STR-MEINS sy-vline 
WA_CKMLDUVNCO_STR-MENGE_VERB sy-vline 
WA_CKMLDUVNCO_STR-MENGE_PROG sy-vline 
WA_CKMLDUVNCO_STR-MENGE sy-vline 
WA_CKMLDUVNCO_STR-MBLNR sy-vline 
WA_CKMLDUVNCO_STR-MJAHR sy-vline 
WA_CKMLDUVNCO_STR-ZEILE sy-vline 
WA_CKMLDUVNCO_STR-DISTRIB sy-vline 
WA_CKMLDUVNCO_STR-KOKRS sy-vline 
WA_CKMLDUVNCO_STR-KOSTL sy-vline 
WA_CKMLDUVNCO_STR-KALNR sy-vline 
WA_CKMLDUVNCO_STR-KDAUF sy-vline 
WA_CKMLDUVNCO_STR-KDPOS sy-vline 
WA_CKMLDUVNCO_STR-AUFNR sy-vline 
WA_CKMLDUVNCO_STR-AUFPS sy-vline 
WA_CKMLDUVNCO_STR-KSTRG sy-vline 
WA_CKMLDUVNCO_STR-AUFPL sy-vline 
WA_CKMLDUVNCO_STR-APLZL sy-vline 
WA_CKMLDUVNCO_STR-OBJNR sy-vline 
WA_CKMLDUVNCO_STR-AUF_MATNR sy-vline 
WA_CKMLDUVNCO_STR-PKOSA sy-vline 
WA_CKMLDUVNCO_STR-MAN_POS sy-vline 
WA_CKMLDUVNCO_STR-BWART_ORIG sy-vline 
WA_CKMLDUVNCO_STR-MBLNR_REV sy-vline 
WA_CKMLDUVNCO_STR-MJAHR_REV sy-vline 
WA_CKMLDUVNCO_STR-ZEILE_REV sy-vline 
WA_CKMLDUVNCO_STR-MENG2 sy-vline 
WA_CKMLDUVNCO_STR-MEINS2 sy-vline 
WA_CKMLDUVNCO_STR-MENG2_PROG sy-vline 
WA_CKMLDUVNCO_STR-MBLNR2 sy-vline 
WA_CKMLDUVNCO_STR-MJAHR2 sy-vline 
WA_CKMLDUVNCO_STR-ZEILE2 sy-vline 
WA_CKMLDUVNCO_STR-MBLNR2_REV sy-vline 
WA_CKMLDUVNCO_STR-MJAHR2_REV sy-vline 
WA_CKMLDUVNCO_STR-ZEILE2_REV sy-vline      INTO ld_text SEPARATED BY SPACE.

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