ABAP Select data from SAP table CKMLDUVACTCO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CKMLDUVACTCO
*  INTO TABLE @DATA(IT_CKMLDUVACTCO2).
*--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_CKMLDUVACTCO INDEX 1 INTO DATA(WA_CKMLDUVACTCO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CKMLDUVACTCO>-MANDT = 1.
<CKMLDUVACTCO>-OBJNR = 1.
<CKMLDUVACTCO>-GJAHR = 1.
<CKMLDUVACTCO>-BELNR = 1.
<CKMLDUVACTCO>-POSNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CKMLDUVACTCO-DATE_FROM, sy-vline,
  WA_CKMLDUVACTCO-DATE_TO, sy-vline,
  WA_CKMLDUVACTCO-UNIT, sy-vline,
  WA_CKMLDUVACTCO-QUANTITY, sy-vline,
  WA_CKMLDUVACTCO-DIFF_QUANT_OLD, sy-vline,
  WA_CKMLDUVACTCO-DIFF_QUANT_PROG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CKMLDUVACTCO 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_CKMLDUVACTCO 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_CKMLDUVACTCO INTO WA_CKMLDUVACTCO.


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

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

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

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

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

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

*Conversion exit MATN1, internal->external for field AUF_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CKMLDUVACTCO-AUF_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CKMLDUVACTCO-AUF_MATNR.
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_CKMLDUVACTCO_STR, 
MANDT TYPE STRING,
OBJNR TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
POSNR TYPE STRING,
DATE_FROM TYPE STRING,
DATE_TO TYPE STRING,
UNIT TYPE STRING,
QUANTITY TYPE STRING,
DIFF_QUANT_OLD TYPE STRING,
DIFF_QUANT_PROG TYPE STRING,
DIFF_QUANT TYPE STRING,
CO_BELNR TYPE STRING,
DOCDISP TYPE STRING,
CO_BUZEI TYPE STRING,
CO_GJAHR TYPE STRING,
DISTRIB TYPE STRING,
AUFNR TYPE STRING,
AUFPS TYPE STRING,
KSTRG TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
PAROB TYPE STRING,
AUF_MATNR TYPE STRING,
KALNR TYPE STRING,
MAN_POS TYPE STRING,
BELNR_REV TYPE STRING,
POSNR_REV TYPE STRING,
DOCDISP_REV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CKMLDUVACTCO_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_CKMLDUVACTCO_STR-MANDT sy-vline 
WA_CKMLDUVACTCO_STR-OBJNR sy-vline 
WA_CKMLDUVACTCO_STR-GJAHR sy-vline 
WA_CKMLDUVACTCO_STR-BELNR sy-vline 
WA_CKMLDUVACTCO_STR-POSNR sy-vline 
WA_CKMLDUVACTCO_STR-DATE_FROM sy-vline 
WA_CKMLDUVACTCO_STR-DATE_TO sy-vline 
WA_CKMLDUVACTCO_STR-UNIT sy-vline 
WA_CKMLDUVACTCO_STR-QUANTITY sy-vline 
WA_CKMLDUVACTCO_STR-DIFF_QUANT_OLD sy-vline 
WA_CKMLDUVACTCO_STR-DIFF_QUANT_PROG sy-vline 
WA_CKMLDUVACTCO_STR-DIFF_QUANT sy-vline 
WA_CKMLDUVACTCO_STR-CO_BELNR sy-vline 
WA_CKMLDUVACTCO_STR-DOCDISP sy-vline 
WA_CKMLDUVACTCO_STR-CO_BUZEI sy-vline 
WA_CKMLDUVACTCO_STR-CO_GJAHR sy-vline 
WA_CKMLDUVACTCO_STR-DISTRIB sy-vline 
WA_CKMLDUVACTCO_STR-AUFNR sy-vline 
WA_CKMLDUVACTCO_STR-AUFPS sy-vline 
WA_CKMLDUVACTCO_STR-KSTRG sy-vline 
WA_CKMLDUVACTCO_STR-AUFPL sy-vline 
WA_CKMLDUVACTCO_STR-APLZL sy-vline 
WA_CKMLDUVACTCO_STR-PAROB sy-vline 
WA_CKMLDUVACTCO_STR-AUF_MATNR sy-vline 
WA_CKMLDUVACTCO_STR-KALNR sy-vline 
WA_CKMLDUVACTCO_STR-MAN_POS sy-vline 
WA_CKMLDUVACTCO_STR-BELNR_REV sy-vline 
WA_CKMLDUVACTCO_STR-POSNR_REV sy-vline 
WA_CKMLDUVACTCO_STR-DOCDISP_REV sy-vline      INTO ld_text SEPARATED BY SPACE.

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