ABAP Select data from SAP table KOMWBHEEX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMWBHEEX
*  INTO TABLE @DATA(IT_KOMWBHEEX2).
*--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_KOMWBHEEX INDEX 1 INTO DATA(WA_KOMWBHEEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMWBHEEX>-TKONN = 1.
<KOMWBHEEX>-TPOSN = 1.
<KOMWBHEEX>-TPOSN_SUB = 1.
<KOMWBHEEX>-TEINN = 1.
<KOMWBHEEX>-OLDPO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMWBHEEX-OLDTE, sy-vline,
  WA_KOMWBHEEX-ERNAM, sy-vline,
  WA_KOMWBHEEX-ERDAT, sy-vline,
  WA_KOMWBHEEX-ERZET, sy-vline,
  WA_KOMWBHEEX-KWMENG, sy-vline,
  WA_KOMWBHEEX-VRKME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMWBHEEX 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_KOMWBHEEX 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_KOMWBHEEX INTO WA_KOMWBHEEX.


*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_KOMWBHEEX-TKONN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWBHEEX-TKONN.
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_KOMWBHEEX_STR, 
TKONN TYPE STRING,
TPOSN TYPE STRING,
TPOSN_SUB TYPE STRING,
TEINN TYPE STRING,
OLDPO TYPE STRING,
OLDTE TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
KWMENG TYPE STRING,
VRKME TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
EDATU_SD TYPE STRING,
EDATU_MM TYPE STRING,
LPEIN_SD TYPE STRING,
LPEIN_MM TYPE STRING,
UPDKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMWBHEEX_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_KOMWBHEEX_STR-TKONN sy-vline 
WA_KOMWBHEEX_STR-TPOSN sy-vline 
WA_KOMWBHEEX_STR-TPOSN_SUB sy-vline 
WA_KOMWBHEEX_STR-TEINN sy-vline 
WA_KOMWBHEEX_STR-OLDPO sy-vline 
WA_KOMWBHEEX_STR-OLDTE sy-vline 
WA_KOMWBHEEX_STR-ERNAM sy-vline 
WA_KOMWBHEEX_STR-ERDAT sy-vline 
WA_KOMWBHEEX_STR-ERZET sy-vline 
WA_KOMWBHEEX_STR-KWMENG sy-vline 
WA_KOMWBHEEX_STR-VRKME sy-vline 
WA_KOMWBHEEX_STR-MENGE sy-vline 
WA_KOMWBHEEX_STR-MEINS sy-vline 
WA_KOMWBHEEX_STR-EDATU_SD sy-vline 
WA_KOMWBHEEX_STR-EDATU_MM sy-vline 
WA_KOMWBHEEX_STR-LPEIN_SD sy-vline 
WA_KOMWBHEEX_STR-LPEIN_MM sy-vline 
WA_KOMWBHEEX_STR-UPDKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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