ABAP Select data from SAP table KOMKBRS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMKBRS
*  INTO TABLE @DATA(IT_KOMKBRS2).
*--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_KOMKBRS INDEX 1 INTO DATA(WA_KOMKBRS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMKBRS>-ACCTNO = 1.
<KOMKBRS>-RET_MATNR = 1.
<KOMKBRS>-BUKRS = 1.
<KOMKBRS>-ROLEACM = 1.
<KOMKBRS>-OTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMKBRS-OBJID, sy-vline,
  WA_KOMKBRS-ACCTSTATE, sy-vline,
  WA_KOMKBRS-VKORG, sy-vline,
  WA_KOMKBRS-VTWEG, sy-vline,
  WA_KOMKBRS-NRART, sy-vline,
  WA_KOMKBRS-PARNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMKBRS 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_KOMKBRS 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_KOMKBRS INTO WA_KOMKBRS.


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

*Conversion exit MATN1, internal->external for field RET_MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KOMKBRS-RET_MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMKBRS-RET_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_KOMKBRS_STR, 
ACCTNO TYPE STRING,
RET_MATNR TYPE STRING,
BUKRS TYPE STRING,
ROLEACM TYPE STRING,
OTYPE TYPE STRING,
OBJID TYPE STRING,
ACCTSTATE TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
NRART TYPE STRING,
PARNR TYPE STRING,
ACMAN TYPE STRING,
ACMANTY TYPE STRING,
ACHOL TYPE STRING,
ACHOLTY TYPE STRING,
CHNGTYPE TYPE STRING,
CUSTNO_PR TYPE STRING,
SUPPNO_PR TYPE STRING,
MATCUSTNO TYPE STRING,
MATSUPPNO TYPE STRING,
MATGR TYPE STRING,
ACCTNO_S TYPE STRING,
CPSTATEHD TYPE STRING,
INTCOM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMKBRS_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_KOMKBRS_STR-ACCTNO sy-vline 
WA_KOMKBRS_STR-RET_MATNR sy-vline 
WA_KOMKBRS_STR-BUKRS sy-vline 
WA_KOMKBRS_STR-ROLEACM sy-vline 
WA_KOMKBRS_STR-OTYPE sy-vline 
WA_KOMKBRS_STR-OBJID sy-vline 
WA_KOMKBRS_STR-ACCTSTATE sy-vline 
WA_KOMKBRS_STR-VKORG sy-vline 
WA_KOMKBRS_STR-VTWEG sy-vline 
WA_KOMKBRS_STR-NRART sy-vline 
WA_KOMKBRS_STR-PARNR sy-vline 
WA_KOMKBRS_STR-ACMAN sy-vline 
WA_KOMKBRS_STR-ACMANTY sy-vline 
WA_KOMKBRS_STR-ACHOL sy-vline 
WA_KOMKBRS_STR-ACHOLTY sy-vline 
WA_KOMKBRS_STR-CHNGTYPE sy-vline 
WA_KOMKBRS_STR-CUSTNO_PR sy-vline 
WA_KOMKBRS_STR-SUPPNO_PR sy-vline 
WA_KOMKBRS_STR-MATCUSTNO sy-vline 
WA_KOMKBRS_STR-MATSUPPNO sy-vline 
WA_KOMKBRS_STR-MATGR sy-vline 
WA_KOMKBRS_STR-ACCTNO_S sy-vline 
WA_KOMKBRS_STR-CPSTATEHD sy-vline 
WA_KOMKBRS_STR-INTCOM sy-vline      INTO ld_text SEPARATED BY SPACE.

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