ABAP Select data from SAP table KOMKBCF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMKBCF
*  INTO TABLE @DATA(IT_KOMKBCF2).
*--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_KOMKBCF INDEX 1 INTO DATA(WA_KOMKBCF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMKBCF>-APLID = 1.
<KOMKBCF>-NR = 1.
<KOMKBCF>-MSGCNT = 1.
<KOMKBCF>-ARBGB = 1.
<KOMKBCF>-MSGTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMKBCF-MSGNR, sy-vline,
  WA_KOMKBCF-MSGV1, sy-vline,
  WA_KOMKBCF-MSGV2, sy-vline,
  WA_KOMKBCF-MSGV3, sy-vline,
  WA_KOMKBCF-MSGV4, sy-vline,
  WA_KOMKBCF-SPRAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMKBCF 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_KOMKBCF 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_KOMKBCF INTO WA_KOMKBCF.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_KOMKBCF-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMKBCF-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMKBCF-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMKBCF-KOSTL.
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_KOMKBCF_STR, 
APLID TYPE STRING,
NR TYPE STRING,
MSGCNT TYPE STRING,
ARBGB TYPE STRING,
MSGTY TYPE STRING,
MSGNR TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
SPRAS TYPE STRING,
OBJKZ TYPE STRING,
OBJECT TYPE STRING,
SUBOBJ TYPE STRING,
DUPCOUNT TYPE STRING,
VBFIX TYPE STRING,
VEBE TYPE STRING,
VBSPZ TYPE STRING,
GRU1 TYPE STRING,
GRU2 TYPE STRING,
KOKRS TYPE STRING,
WERKS TYPE STRING,
LOGSYS TYPE STRING,
EKGRP TYPE STRING,
LABOR TYPE STRING,
KAPPLANER TYPE STRING,
DISPO TYPE STRING,
KOSTL TYPE STRING,
VAGRP TYPE STRING,
IX_KOMK TYPE STRING,
IX_KOMT1_V TYPE STRING,
IX_KOMT1_B TYPE STRING,
DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMKBCF_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_KOMKBCF_STR-APLID sy-vline 
WA_KOMKBCF_STR-NR sy-vline 
WA_KOMKBCF_STR-MSGCNT sy-vline 
WA_KOMKBCF_STR-ARBGB sy-vline 
WA_KOMKBCF_STR-MSGTY sy-vline 
WA_KOMKBCF_STR-MSGNR sy-vline 
WA_KOMKBCF_STR-MSGV1 sy-vline 
WA_KOMKBCF_STR-MSGV2 sy-vline 
WA_KOMKBCF_STR-MSGV3 sy-vline 
WA_KOMKBCF_STR-MSGV4 sy-vline 
WA_KOMKBCF_STR-SPRAS sy-vline 
WA_KOMKBCF_STR-OBJKZ sy-vline 
WA_KOMKBCF_STR-OBJECT sy-vline 
WA_KOMKBCF_STR-SUBOBJ sy-vline 
WA_KOMKBCF_STR-DUPCOUNT sy-vline 
WA_KOMKBCF_STR-VBFIX sy-vline 
WA_KOMKBCF_STR-VEBE sy-vline 
WA_KOMKBCF_STR-VBSPZ sy-vline 
WA_KOMKBCF_STR-GRU1 sy-vline 
WA_KOMKBCF_STR-GRU2 sy-vline 
WA_KOMKBCF_STR-KOKRS sy-vline 
WA_KOMKBCF_STR-WERKS sy-vline 
WA_KOMKBCF_STR-LOGSYS sy-vline 
WA_KOMKBCF_STR-EKGRP sy-vline 
WA_KOMKBCF_STR-LABOR sy-vline 
WA_KOMKBCF_STR-KAPPLANER sy-vline 
WA_KOMKBCF_STR-DISPO sy-vline 
WA_KOMKBCF_STR-KOSTL sy-vline 
WA_KOMKBCF_STR-VAGRP sy-vline 
WA_KOMKBCF_STR-IX_KOMK sy-vline 
WA_KOMKBCF_STR-IX_KOMT1_V sy-vline 
WA_KOMKBCF_STR-IX_KOMT1_B sy-vline 
WA_KOMKBCF_STR-DUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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