ABAP Select data from SAP table KOMWB_MATCH_KEY_WBHD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMWB_MATCH_KEY_WBHD
*  INTO TABLE @DATA(IT_KOMWB_MATCH_KEY_WBHD2).
*--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_KOMWB_MATCH_KEY_WBHD INDEX 1 INTO DATA(WA_KOMWB_MATCH_KEY_WBHD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMWB_MATCH_KEY_WBHD>-ELIFN = 1.
<KOMWB_MATCH_KEY_WBHD>-EKORG = 1.
<KOMWB_MATCH_KEY_WBHD>-EKGRP = 1.
<KOMWB_MATCH_KEY_WBHD>-IHREZ = 1.
<KOMWB_MATCH_KEY_WBHD>-EBDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMWB_MATCH_KEY_WBHD-EINDT, sy-vline,
  WA_KOMWB_MATCH_KEY_WBHD-LPEIN_INT, sy-vline,
  WA_KOMWB_MATCH_KEY_WBHD-WAERS_PURCH, sy-vline,
  WA_KOMWB_MATCH_KEY_WBHD-TKRATE_MM, sy-vline,
  WA_KOMWB_MATCH_KEY_WBHD-KURST_MM, sy-vline,
  WA_KOMWB_MATCH_KEY_WBHD-ZTERM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMWB_MATCH_KEY_WBHD 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_KOMWB_MATCH_KEY_WBHD 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_KOMWB_MATCH_KEY_WBHD INTO WA_KOMWB_MATCH_KEY_WBHD.


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

*Conversion exit EXCRT, internal->external for field TKRATE_MM
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_KOMWB_MATCH_KEY_WBHD-TKRATE_MM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWB_MATCH_KEY_WBHD-TKRATE_MM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUSNR_MM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMWB_MATCH_KEY_WBHD-AUSNR_MM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWB_MATCH_KEY_WBHD-AUSNR_MM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LLIEF_MM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMWB_MATCH_KEY_WBHD-LLIEF_MM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWB_MATCH_KEY_WBHD-LLIEF_MM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LCNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMWB_MATCH_KEY_WBHD-LCNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWB_MATCH_KEY_WBHD-LCNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field POSEX_E
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMWB_MATCH_KEY_WBHD-POSEX_E
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWB_MATCH_KEY_WBHD-POSEX_E.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSK_SD
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_KOMWB_MATCH_KEY_WBHD-KURSK_SD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWB_MATCH_KEY_WBHD-KURSK_SD.
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_KOMWB_MATCH_KEY_WBHD_STR, 
ELIFN TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
IHREZ TYPE STRING,
EBDAT TYPE STRING,
EINDT TYPE STRING,
LPEIN_INT TYPE STRING,
WAERS_PURCH TYPE STRING,
TKRATE_MM TYPE STRING,
KURST_MM TYPE STRING,
ZTERM TYPE STRING,
VALDT TYPE STRING,
TERMDES_MM TYPE STRING,
PRSDT_MM TYPE STRING,
PRSDT_SD TYPE STRING,
WERK_MM TYPE STRING,
INCO1_MM TYPE STRING,
INCO2_MM TYPE STRING,
IHRAN TYPE STRING,
EDATU_VBAK TYPE STRING,
PRGRS_VBAK TYPE STRING,
INCO1_SD TYPE STRING,
INCO2_SD TYPE STRING,
ZTERM_SALES TYPE STRING,
TERMDES_SD TYPE STRING,
VALDTD TYPE STRING,
ZLSCH TYPE STRING,
AUSNR_MM TYPE STRING,
ANGNR_MM TYPE STRING,
KDATB_MM TYPE STRING,
KDATE_MM TYPE STRING,
VERKF_MM TYPE STRING,
TELF1_MM TYPE STRING,
LLIEF_MM TYPE STRING,
UNSEZ_MM TYPE STRING,
EVERS_MM TYPE STRING,
BSTAE_MM TYPE STRING,
KZABS_MM TYPE STRING,
LABNR TYPE STRING,
KZAZU TYPE STRING,
HKLA TYPE STRING,
LCNUM TYPE STRING,
ABSSC TYPE STRING,
AKPRZ TYPE STRING,
KUFIX TYPE STRING,
BSTYP TYPE STRING,
BSART TYPE STRING,
VSART TYPE STRING,
BSTKD_E TYPE STRING,
POSEX_E TYPE STRING,
BSTKD TYPE STRING,
BSTDK TYPE STRING,
BSTDK_E TYPE STRING,
KALSM_MM TYPE STRING,
KNUMV_MM TYPE STRING,
KURSK_SD TYPE STRING,
RESWK TYPE STRING,
RETPC TYPE STRING,
DPTYP TYPE STRING,
DPPCT TYPE STRING,
DPAMT TYPE STRING,
DPDAT TYPE STRING,
PODKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMWB_MATCH_KEY_WBHD_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_KOMWB_MATCH_KEY_WBHD_STR-ELIFN sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-EKORG sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-EKGRP sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-IHREZ sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-EBDAT sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-EINDT sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-LPEIN_INT sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-WAERS_PURCH sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-TKRATE_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-KURST_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-ZTERM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-VALDT sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-TERMDES_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-PRSDT_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-PRSDT_SD sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-WERK_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-INCO1_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-INCO2_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-IHRAN sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-EDATU_VBAK sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-PRGRS_VBAK sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-INCO1_SD sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-INCO2_SD sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-ZTERM_SALES sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-TERMDES_SD sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-VALDTD sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-ZLSCH sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-AUSNR_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-ANGNR_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-KDATB_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-KDATE_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-VERKF_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-TELF1_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-LLIEF_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-UNSEZ_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-EVERS_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-BSTAE_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-KZABS_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-LABNR sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-KZAZU sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-HKLA sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-LCNUM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-ABSSC sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-AKPRZ sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-KUFIX sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-BSTYP sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-BSART sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-VSART sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-BSTKD_E sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-POSEX_E sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-BSTKD sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-BSTDK sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-BSTDK_E sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-KALSM_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-KNUMV_MM sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-KURSK_SD sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-RESWK sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-RETPC sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-DPTYP sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-DPPCT sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-DPAMT sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-DPDAT sy-vline 
WA_KOMWB_MATCH_KEY_WBHD_STR-PODKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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