ABAP Select data from SAP table K840006 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP K840006 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 K840006. 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 K840006 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_K840006 TYPE STANDARD TABLE OF K840006,
      WA_K840006 TYPE K840006,
      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: <K840006> TYPE K840006.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_K840006.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM K840006
  INTO TABLE IT_K840006.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM K840006
*  INTO TABLE @DATA(IT_K8400062).
*--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_K840006 INDEX 1 INTO DATA(WA_K8400062).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_K840006 ASSIGNING <K840006>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<K840006>-TRKEYNR = 1.
<K840006>-PERIO = 1.
<K840006>-UNITIN = 1.
<K840006>-UNITOUT = 1.
<K840006>-KOMGIN = 1.

ENDLOOP.

LOOP AT IT_K840006 INTO WA_K840006.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_K840006-KOMGOUT, sy-vline,
  WA_K840006-KOWFX, sy-vline,
  WA_K840006-KOWGS, sy-vline,
  WA_K840006-KOWGSB, sy-vline,
  WA_K840006-KOWGSO, sy-vline,
  WA_K840006-MENGEIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_K840006 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_K840006 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_K840006 INTO WA_K840006.


*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 CUNIT, internal->external for field UNITIN
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_K840006-UNITIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_K840006-UNITIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITOUT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_K840006-UNITOUT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_K840006-UNITOUT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WRTFX
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_K840006-WRTFX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_K840006-WRTFX.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WRTGS
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_K840006-WRTGS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_K840006-WRTGS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WRTGSO
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_K840006-WRTGSO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_K840006-WRTGSO.
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_K840006_STR, 
TRKEYNR TYPE STRING,
PERIO TYPE STRING,
UNITIN TYPE STRING,
UNITOUT TYPE STRING,
KOMGIN TYPE STRING,
KOMGOUT TYPE STRING,
KOWFX TYPE STRING,
KOWGS TYPE STRING,
KOWGSB TYPE STRING,
KOWGSO TYPE STRING,
MENGEIN TYPE STRING,
MENGEOUT TYPE STRING,
WRTFX TYPE STRING,
WRTGS TYPE STRING,
WRTGSB TYPE STRING,
WRTGSO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_K840006_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_K840006_STR-TRKEYNR sy-vline 
WA_K840006_STR-PERIO sy-vline 
WA_K840006_STR-UNITIN sy-vline 
WA_K840006_STR-UNITOUT sy-vline 
WA_K840006_STR-KOMGIN sy-vline 
WA_K840006_STR-KOMGOUT sy-vline 
WA_K840006_STR-KOWFX sy-vline 
WA_K840006_STR-KOWGS sy-vline 
WA_K840006_STR-KOWGSB sy-vline 
WA_K840006_STR-KOWGSO sy-vline 
WA_K840006_STR-MENGEIN sy-vline 
WA_K840006_STR-MENGEOUT sy-vline 
WA_K840006_STR-WRTFX sy-vline 
WA_K840006_STR-WRTGS sy-vline 
WA_K840006_STR-WRTGSB sy-vline 
WA_K840006_STR-WRTGSO sy-vline      INTO ld_text SEPARATED BY SPACE.

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