ABAP Select data from SAP table KOMWB_MATCHING_HEADER_MAINTAIN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KOMWB_MATCHING_HEADER_MAINTAIN 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_MATCHING_HEADER_MAINTAIN. 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_MATCHING_HEADER_MAINTAIN 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_MATCHING_HEADER_MAINTAIN TYPE STANDARD TABLE OF KOMWB_MATCHING_HEADER_MAINTAIN,
      WA_KOMWB_MATCHING_HEADER_MAINTAIN TYPE KOMWB_MATCHING_HEADER_MAINTAIN,
      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_MATCHING_HEADER_MAINTAIN> TYPE KOMWB_MATCHING_HEADER_MAINTAIN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMWB_MATCHING_HEADER_MAINTAIN
*  INTO TABLE @DATA(IT_KOMWB_MATCHING_HEADER_MAINTAIN2).
*--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_MATCHING_HEADER_MAINTAIN INDEX 1 INTO DATA(WA_KOMWB_MATCHING_HEADER_MAINTAIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMWB_MATCHING_HEADER_MAINTAIN>-MATCHING_INTERNAL_ID = 1.
<KOMWB_MATCHING_HEADER_MAINTAIN>-TCTYP_TO = 1.
<KOMWB_MATCHING_HEADER_MAINTAIN>-TKONN = 1.
<KOMWB_MATCHING_HEADER_MAINTAIN>-TKONN_EX = 1.
<KOMWB_MATCHING_HEADER_MAINTAIN>-BTBSTA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMWB_MATCHING_HEADER_MAINTAIN-KUNNR, sy-vline,
  WA_KOMWB_MATCHING_HEADER_MAINTAIN-ERNAM, sy-vline,
  WA_KOMWB_MATCHING_HEADER_MAINTAIN-ERDAT, sy-vline,
  WA_KOMWB_MATCHING_HEADER_MAINTAIN-ERZEIT, sy-vline,
  WA_KOMWB_MATCHING_HEADER_MAINTAIN-AENAM, sy-vline,
  WA_KOMWB_MATCHING_HEADER_MAINTAIN-AEDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMWB_MATCHING_HEADER_MAINTAIN 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_MATCHING_HEADER_MAINTAIN 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_MATCHING_HEADER_MAINTAIN INTO WA_KOMWB_MATCHING_HEADER_MAINTAIN.


*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_KOMWB_MATCHING_HEADER_MAINTAIN-TKONN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWB_MATCHING_HEADER_MAINTAIN-TKONN.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit EXCRT, internal->external for field TKRATE_MM
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_KOMWB_MATCHING_HEADER_MAINTAIN-TKRATE_MM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWB_MATCHING_HEADER_MAINTAIN-TKRATE_MM.
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_MATCHING_HEADER_MAINTAIN_STR, 
MATCHING_INTERNAL_ID TYPE STRING,
TCTYP_TO TYPE STRING,
TKONN TYPE STRING,
TKONN_EX TYPE STRING,
BTBSTA TYPE STRING,
KUNNR TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZEIT TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AEZEIT TYPE STRING,
TKSACHB TYPE STRING,
TKWAERS TYPE STRING,
TKRATE TYPE STRING,
KURST TYPE STRING,
BUDAT TYPE STRING,
KVEWE TYPE STRING,
KAPPL TYPE STRING,
KSCHL TYPE STRING,
KAWRT TYPE STRING,
KBETR TYPE STRING,
KWERT TYPE STRING,
WAERS TYPE STRING,
KSCHL_SD TYPE STRING,
KWERT_SD TYPE STRING,
KOEIN_SD TYPE STRING,
KSCHL_MM TYPE STRING,
KWERT_MM TYPE STRING,
KOEIN_MM TYPE STRING,
AUGRU TYPE STRING,
ABSSC TYPE STRING,
AUDAT TYPE STRING,
WKURS_DAT TYPE STRING,
KURRF TYPE STRING,
ELIFN TYPE STRING,
TEW_TYPE TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VKGRP TYPE STRING,
VKBUR TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
EBDAT TYPE STRING,
NETWR_SD TYPE STRING,
SDWRS TYPE STRING,
TKRATE_SD TYPE STRING,
KURST_SD TYPE STRING,
PRSDT_SD TYPE STRING,
ZTERM_SALES TYPE STRING,
VALDTD TYPE STRING,
NETWR_MM TYPE STRING,
WAERS_PURCH TYPE STRING,
TKRATE_MM TYPE STRING,
KURST_MM TYPE STRING,
PRSDT_MM TYPE STRING,
ZTERM TYPE STRING,
VALDT TYPE STRING,
TC_RELEASED TYPE STRING,
COMPANY_CODE TYPE STRING,
SET_VARIANT TYPE STRING,
SETT_MODE TYPE STRING,
SETT_STATUS TYPE STRING,
STATGR TYPE STRING,
COMPLETE TYPE STRING,
QUAN_COMPLETE TYPE STRING,
UPDKZ TYPE STRING,
BEZEI_TCTYP TYPE STRING,
BEZEI_KUNNR TYPE STRING,
BEZEI_LIFNR TYPE STRING,
BEZEI_STATUS TYPE STRING,
AMPEL_STATUS TYPE STRING,
VTEXT_KSCHL TYPE STRING,
BEZEI_CURT TYPE STRING,
BEZEI_VKORG TYPE STRING,
BEZEI_VTWEG TYPE STRING,
BEZEI_SPART TYPE STRING,
TXT_VTRBER TYPE STRING,
BEZEI_VKBUR TYPE STRING,
BEZEI_VKGRP TYPE STRING,
BEZEI_EKORG TYPE STRING,
BEZEI_EKGRP TYPE STRING,
BEZEI_CURT_SD TYPE STRING,
BEZEI_CURT_MM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMWB_MATCHING_HEADER_MAINTAIN_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_MATCHING_HEADER_MAINTAIN_STR-MATCHING_INTERNAL_ID sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TCTYP_TO sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TKONN sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TKONN_EX sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BTBSTA sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KUNNR sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-ERNAM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-ERDAT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-ERZEIT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-AENAM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-AEDAT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-AEZEIT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TKSACHB sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TKWAERS sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TKRATE sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KURST sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BUDAT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KVEWE sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KAPPL sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KSCHL sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KAWRT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KBETR sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KWERT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-WAERS sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KSCHL_SD sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KWERT_SD sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KOEIN_SD sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KSCHL_MM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KWERT_MM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KOEIN_MM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-AUGRU sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-ABSSC sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-AUDAT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-WKURS_DAT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KURRF sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-ELIFN sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TEW_TYPE sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-VKORG sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-VTWEG sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-SPART sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-VKGRP sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-VKBUR sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-EKORG sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-EKGRP sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-EBDAT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-NETWR_SD sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-SDWRS sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TKRATE_SD sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KURST_SD sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-PRSDT_SD sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-ZTERM_SALES sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-VALDTD sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-NETWR_MM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-WAERS_PURCH sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TKRATE_MM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-KURST_MM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-PRSDT_MM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-ZTERM sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-VALDT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TC_RELEASED sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-COMPANY_CODE sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-SET_VARIANT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-SETT_MODE sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-SETT_STATUS sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-STATGR sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-COMPLETE sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-QUAN_COMPLETE sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-UPDKZ sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_TCTYP sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_KUNNR sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_LIFNR sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_STATUS sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-AMPEL_STATUS sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-VTEXT_KSCHL sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_CURT sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_VKORG sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_VTWEG sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_SPART sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-TXT_VTRBER sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_VKBUR sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_VKGRP sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_EKORG sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_EKGRP sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_CURT_SD sy-vline 
WA_KOMWB_MATCHING_HEADER_MAINTAIN_STR-BEZEI_CURT_MM sy-vline      INTO ld_text SEPARATED BY SPACE.

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