ABAP Select data from SAP table KOMWBHI_REFC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMWBHI_REFC
*  INTO TABLE @DATA(IT_KOMWBHI_REFC2).
*--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_KOMWBHI_REFC INDEX 1 INTO DATA(WA_KOMWBHI_REFC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMWBHI_REFC>-TKONN = 1.
<KOMWBHI_REFC>-TPOSN = 1.
<KOMWBHI_REFC>-KWMENG = 1.
<KOMWBHI_REFC>-MENGE = 1.
<KOMWBHI_REFC>-EINDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMWBHI_REFC-SPLITT, sy-vline,
  WA_KOMWBHI_REFC-COUNTER, sy-vline,
  WA_KOMWBHI_REFC-SPLITT_MENGE, sy-vline,
  WA_KOMWBHI_REFC-SPLITT_MENGE_SO, sy-vline,
  WA_KOMWBHI_REFC-QUAN_UOM, sy-vline,
  WA_KOMWBHI_REFC-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMWBHI_REFC 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_KOMWBHI_REFC 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_KOMWBHI_REFC INTO WA_KOMWBHI_REFC.


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

*Conversion exit CUNIT, internal->external for field QUAN_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KOMWBHI_REFC-QUAN_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWBHI_REFC-QUAN_UOM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KOMWBHI_REFC-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWBHI_REFC-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_KOMWBHI_REFC-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWBHI_REFC-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TKONN_FROM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMWBHI_REFC-TKONN_FROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWBHI_REFC-TKONN_FROM.
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_KOMWBHI_REFC_STR, 
TKONN TYPE STRING,
TPOSN TYPE STRING,
KWMENG TYPE STRING,
MENGE TYPE STRING,
EINDT TYPE STRING,
SPLITT TYPE STRING,
COUNTER TYPE STRING,
SPLITT_MENGE TYPE STRING,
SPLITT_MENGE_SO TYPE STRING,
QUAN_UOM TYPE STRING,
MATNR TYPE STRING,
ARKTX TYPE STRING,
MEINS TYPE STRING,
VRKME TYPE STRING,
TKONN_FROM TYPE STRING,
TPOSN_FROM TYPE STRING,
EDATU TYPE STRING,
UEPOS TYPE STRING,
WERKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMWBHI_REFC_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_KOMWBHI_REFC_STR-TKONN sy-vline 
WA_KOMWBHI_REFC_STR-TPOSN sy-vline 
WA_KOMWBHI_REFC_STR-KWMENG sy-vline 
WA_KOMWBHI_REFC_STR-MENGE sy-vline 
WA_KOMWBHI_REFC_STR-EINDT sy-vline 
WA_KOMWBHI_REFC_STR-SPLITT sy-vline 
WA_KOMWBHI_REFC_STR-COUNTER sy-vline 
WA_KOMWBHI_REFC_STR-SPLITT_MENGE sy-vline 
WA_KOMWBHI_REFC_STR-SPLITT_MENGE_SO sy-vline 
WA_KOMWBHI_REFC_STR-QUAN_UOM sy-vline 
WA_KOMWBHI_REFC_STR-MATNR sy-vline 
WA_KOMWBHI_REFC_STR-ARKTX sy-vline 
WA_KOMWBHI_REFC_STR-MEINS sy-vline 
WA_KOMWBHI_REFC_STR-VRKME sy-vline 
WA_KOMWBHI_REFC_STR-TKONN_FROM sy-vline 
WA_KOMWBHI_REFC_STR-TPOSN_FROM sy-vline 
WA_KOMWBHI_REFC_STR-EDATU sy-vline 
WA_KOMWBHI_REFC_STR-UEPOS sy-vline 
WA_KOMWBHI_REFC_STR-WERKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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