ABAP Select data from SAP table KOMPM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMPM
*  INTO TABLE @DATA(IT_KOMPM2).
*--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_KOMPM INDEX 1 INTO DATA(WA_KOMPM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMPM>-MANDT = 1.
<KOMPM>-KPOSN = 1.
<KOMPM>-MATNR = 1.
<KOMPM>-CHARG = 1.
<KOMPM>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMPM-WKREG, sy-vline,
  WA_KOMPM-EAN11, sy-vline,
  WA_KOMPM-EANNR, sy-vline,
  WA_KOMPM-WAGRP, sy-vline,
  WA_KOMPM-KONDM, sy-vline,
  WA_KOMPM-PROVG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMPM 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_KOMPM 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_KOMPM INTO WA_KOMPM.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KOMPM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_KOMPM-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPM-EAN11.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field PMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KOMPM-PMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPM-PMATN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field PPRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMPM-PPRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMPM-PPRCTR.
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_KOMPM_STR, 
MANDT TYPE STRING,
KPOSN TYPE STRING,
MATNR TYPE STRING,
CHARG TYPE STRING,
WERKS TYPE STRING,
WKREG TYPE STRING,
EAN11 TYPE STRING,
EANNR TYPE STRING,
WAGRP TYPE STRING,
KONDM TYPE STRING,
PROVG TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
MATKL TYPE STRING,
TAXIM TYPE STRING,
TAXIK TYPE STRING,
TAXIW TYPE STRING,
TAXIL TYPE STRING,
TAXIR TYPE STRING,
KOLIF TYPE STRING,
KOLBO TYPE STRING,
KOLB2 TYPE STRING,
KOLB3 TYPE STRING,
KOLTS TYPE STRING,
KOLWG TYPE STRING,
LTSNR TYPE STRING,
WGLIF TYPE STRING,
EBONU TYPE STRING,
EBON2 TYPE STRING,
EBON3 TYPE STRING,
WGRU1 TYPE STRING,
WGRU2 TYPE STRING,
PRODH TYPE STRING,
PMATN TYPE STRING,
EKKOL TYPE STRING,
EKKOA TYPE STRING,
MTART TYPE STRING,
TAXM1 TYPE STRING,
TAXM2 TYPE STRING,
TAXM3 TYPE STRING,
TAXM4 TYPE STRING,
TAXM5 TYPE STRING,
TAXM6 TYPE STRING,
TAXM7 TYPE STRING,
TAXM8 TYPE STRING,
TAXM9 TYPE STRING,
ZTERM TYPE STRING,
SERNR TYPE STRING,
SPART TYPE STRING,
PRCTR TYPE STRING,
PPRCTR TYPE STRING,
BSGRU TYPE STRING,
HLAND TYPE STRING,
IX_KOMKM TYPE STRING,
UPDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMPM_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_KOMPM_STR-MANDT sy-vline 
WA_KOMPM_STR-KPOSN sy-vline 
WA_KOMPM_STR-MATNR sy-vline 
WA_KOMPM_STR-CHARG sy-vline 
WA_KOMPM_STR-WERKS sy-vline 
WA_KOMPM_STR-WKREG sy-vline 
WA_KOMPM_STR-EAN11 sy-vline 
WA_KOMPM_STR-EANNR sy-vline 
WA_KOMPM_STR-WAGRP sy-vline 
WA_KOMPM_STR-KONDM sy-vline 
WA_KOMPM_STR-PROVG sy-vline 
WA_KOMPM_STR-BWKEY sy-vline 
WA_KOMPM_STR-BWTAR sy-vline 
WA_KOMPM_STR-MATKL sy-vline 
WA_KOMPM_STR-TAXIM sy-vline 
WA_KOMPM_STR-TAXIK sy-vline 
WA_KOMPM_STR-TAXIW sy-vline 
WA_KOMPM_STR-TAXIL sy-vline 
WA_KOMPM_STR-TAXIR sy-vline 
WA_KOMPM_STR-KOLIF sy-vline 
WA_KOMPM_STR-KOLBO sy-vline 
WA_KOMPM_STR-KOLB2 sy-vline 
WA_KOMPM_STR-KOLB3 sy-vline 
WA_KOMPM_STR-KOLTS sy-vline 
WA_KOMPM_STR-KOLWG sy-vline 
WA_KOMPM_STR-LTSNR sy-vline 
WA_KOMPM_STR-WGLIF sy-vline 
WA_KOMPM_STR-EBONU sy-vline 
WA_KOMPM_STR-EBON2 sy-vline 
WA_KOMPM_STR-EBON3 sy-vline 
WA_KOMPM_STR-WGRU1 sy-vline 
WA_KOMPM_STR-WGRU2 sy-vline 
WA_KOMPM_STR-PRODH sy-vline 
WA_KOMPM_STR-PMATN sy-vline 
WA_KOMPM_STR-EKKOL sy-vline 
WA_KOMPM_STR-EKKOA sy-vline 
WA_KOMPM_STR-MTART sy-vline 
WA_KOMPM_STR-TAXM1 sy-vline 
WA_KOMPM_STR-TAXM2 sy-vline 
WA_KOMPM_STR-TAXM3 sy-vline 
WA_KOMPM_STR-TAXM4 sy-vline 
WA_KOMPM_STR-TAXM5 sy-vline 
WA_KOMPM_STR-TAXM6 sy-vline 
WA_KOMPM_STR-TAXM7 sy-vline 
WA_KOMPM_STR-TAXM8 sy-vline 
WA_KOMPM_STR-TAXM9 sy-vline 
WA_KOMPM_STR-ZTERM sy-vline 
WA_KOMPM_STR-SERNR sy-vline 
WA_KOMPM_STR-SPART sy-vline 
WA_KOMPM_STR-PRCTR sy-vline 
WA_KOMPM_STR-PPRCTR sy-vline 
WA_KOMPM_STR-BSGRU sy-vline 
WA_KOMPM_STR-HLAND sy-vline 
WA_KOMPM_STR-IX_KOMKM sy-vline 
WA_KOMPM_STR-UPDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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