ABAP Select data from SAP table KOMTCKOCX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMTCKOCX
*  INTO TABLE @DATA(IT_KOMTCKOCX2).
*--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_KOMTCKOCX INDEX 1 INTO DATA(WA_KOMTCKOCX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMTCKOCX>-TPOSN = 1.
<KOMTCKOCX>-STUNR = 1.
<KOMTCKOCX>-ZAEHK = 1.
<KOMTCKOCX>-KSCHL = 1.
<KOMTCKOCX>-KBETR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMTCKOCX-WAERS, sy-vline,
  WA_KOMTCKOCX-KMEIN, sy-vline,
  WA_KOMTCKOCX-KPEIN, sy-vline,
  WA_KOMTCKOCX-UPDKZ, sy-vline,
  WA_KOMTCKOCX-KWERT, sy-vline,
  WA_KOMTCKOCX-KSTEU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMTCKOCX 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_KOMTCKOCX 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_KOMTCKOCX INTO WA_KOMTCKOCX.


*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 TKONN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMTCKOCX-TKONN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMTCKOCX-TKONN.
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_KOMTCKOCX_STR, 
TPOSN TYPE STRING,
STUNR TYPE STRING,
ZAEHK TYPE STRING,
KSCHL TYPE STRING,
KBETR TYPE STRING,
WAERS TYPE STRING,
KMEIN TYPE STRING,
KPEIN TYPE STRING,
UPDKZ TYPE STRING,
KWERT TYPE STRING,
KSTEU TYPE STRING,
FORMSTATUS TYPE STRING,
KOAID TYPE STRING,
KUMZA TYPE STRING,
KUMNE TYPE STRING,
KRECH TYPE STRING,
KAWRT TYPE STRING,
KDIFF TYPE STRING,
KKURS TYPE STRING,
KINAK TYPE STRING,
KSTAT TYPE STRING,
KMPRS TYPE STRING,
KGRPE TYPE STRING,
KHERK TYPE STRING,
KDATU TYPE STRING,
KZBZG TYPE STRING,
KSTBS TYPE STRING,
KONWS TYPE STRING,
KONMS TYPE STRING,
KBFLAG TYPE STRING,
TKONN TYPE STRING,
OLDPO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMTCKOCX_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_KOMTCKOCX_STR-TPOSN sy-vline 
WA_KOMTCKOCX_STR-STUNR sy-vline 
WA_KOMTCKOCX_STR-ZAEHK sy-vline 
WA_KOMTCKOCX_STR-KSCHL sy-vline 
WA_KOMTCKOCX_STR-KBETR sy-vline 
WA_KOMTCKOCX_STR-WAERS sy-vline 
WA_KOMTCKOCX_STR-KMEIN sy-vline 
WA_KOMTCKOCX_STR-KPEIN sy-vline 
WA_KOMTCKOCX_STR-UPDKZ sy-vline 
WA_KOMTCKOCX_STR-KWERT sy-vline 
WA_KOMTCKOCX_STR-KSTEU sy-vline 
WA_KOMTCKOCX_STR-FORMSTATUS sy-vline 
WA_KOMTCKOCX_STR-KOAID sy-vline 
WA_KOMTCKOCX_STR-KUMZA sy-vline 
WA_KOMTCKOCX_STR-KUMNE sy-vline 
WA_KOMTCKOCX_STR-KRECH sy-vline 
WA_KOMTCKOCX_STR-KAWRT sy-vline 
WA_KOMTCKOCX_STR-KDIFF sy-vline 
WA_KOMTCKOCX_STR-KKURS sy-vline 
WA_KOMTCKOCX_STR-KINAK sy-vline 
WA_KOMTCKOCX_STR-KSTAT sy-vline 
WA_KOMTCKOCX_STR-KMPRS sy-vline 
WA_KOMTCKOCX_STR-KGRPE sy-vline 
WA_KOMTCKOCX_STR-KHERK sy-vline 
WA_KOMTCKOCX_STR-KDATU sy-vline 
WA_KOMTCKOCX_STR-KZBZG sy-vline 
WA_KOMTCKOCX_STR-KSTBS sy-vline 
WA_KOMTCKOCX_STR-KONWS sy-vline 
WA_KOMTCKOCX_STR-KONMS sy-vline 
WA_KOMTCKOCX_STR-KBFLAG sy-vline 
WA_KOMTCKOCX_STR-TKONN sy-vline 
WA_KOMTCKOCX_STR-OLDPO sy-vline      INTO ld_text SEPARATED BY SPACE.

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