ABAP Select data from SAP table KOMWBRD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMWBRD
*  INTO TABLE @DATA(IT_KOMWBRD2).
*--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_KOMWBRD INDEX 1 INTO DATA(WA_KOMWBRD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMWBRD>-MANDT = 1.
<KOMWBRD>-WBELN = 1.
<KOMWBRD>-KOART = 1.
<KOMWBRD>-ERZET = 1.
<KOMWBRD>-ERDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMWBRD-ERNAM, sy-vline,
  WA_KOMWBRD-AEDAT, sy-vline,
  WA_KOMWBRD-_DATAAGING, sy-vline,
  WA_KOMWBRD-BANKN, sy-vline,
  WA_KOMWBRD-BANKL, sy-vline,
  WA_KOMWBRD-BANKS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMWBRD 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_KOMWBRD 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_KOMWBRD INTO WA_KOMWBRD.


*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 WBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMWBRD-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWBRD-WBELN.
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_KOMWBRD_STR, 
MANDT TYPE STRING,
WBELN TYPE STRING,
KOART TYPE STRING,
ERZET TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
_DATAAGING TYPE STRING,
BANKN TYPE STRING,
BANKL TYPE STRING,
BANKS TYPE STRING,
BKONT TYPE STRING,
BKREF TYPE STRING,
DTAWS TYPE STRING,
DTAMS TYPE STRING,
STCD1 TYPE STRING,
STCD2 TYPE STRING,
STCD3 TYPE STRING,
STCD4 TYPE STRING,
STKZN TYPE STRING,
STKZA TYPE STRING,
STKZU TYPE STRING,
FITYP TYPE STRING,
STCDT TYPE STRING,
J_1KFREPRE TYPE STRING,
J_1KFTBUS TYPE STRING,
J_1KFTIND TYPE STRING,
UPDKZ TYPE STRING,
IBAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMWBRD_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_KOMWBRD_STR-MANDT sy-vline 
WA_KOMWBRD_STR-WBELN sy-vline 
WA_KOMWBRD_STR-KOART sy-vline 
WA_KOMWBRD_STR-ERZET sy-vline 
WA_KOMWBRD_STR-ERDAT sy-vline 
WA_KOMWBRD_STR-ERNAM sy-vline 
WA_KOMWBRD_STR-AEDAT sy-vline 
WA_KOMWBRD_STR-_DATAAGING sy-vline 
WA_KOMWBRD_STR-BANKN sy-vline 
WA_KOMWBRD_STR-BANKL sy-vline 
WA_KOMWBRD_STR-BANKS sy-vline 
WA_KOMWBRD_STR-BKONT sy-vline 
WA_KOMWBRD_STR-BKREF sy-vline 
WA_KOMWBRD_STR-DTAWS sy-vline 
WA_KOMWBRD_STR-DTAMS sy-vline 
WA_KOMWBRD_STR-STCD1 sy-vline 
WA_KOMWBRD_STR-STCD2 sy-vline 
WA_KOMWBRD_STR-STCD3 sy-vline 
WA_KOMWBRD_STR-STCD4 sy-vline 
WA_KOMWBRD_STR-STKZN sy-vline 
WA_KOMWBRD_STR-STKZA sy-vline 
WA_KOMWBRD_STR-STKZU sy-vline 
WA_KOMWBRD_STR-FITYP sy-vline 
WA_KOMWBRD_STR-STCDT sy-vline 
WA_KOMWBRD_STR-J_1KFREPRE sy-vline 
WA_KOMWBRD_STR-J_1KFTBUS sy-vline 
WA_KOMWBRD_STR-J_1KFTIND sy-vline 
WA_KOMWBRD_STR-UPDKZ sy-vline 
WA_KOMWBRD_STR-IBAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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