ABAP Select data from SAP table KOMWBHK_WBGT_LIST_DISPLAY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMWBHK_WBGT_LIST_DISPLAY
*  INTO TABLE @DATA(IT_KOMWBHK_WBGT_LIST_DISPLAY2).
*--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_KOMWBHK_WBGT_LIST_DISPLAY INDEX 1 INTO DATA(WA_KOMWBHK_WBGT_LIST_DISPLAY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KOMWBHK_WBGT_LIST_DISPLAY>-MANDT = 1.
<KOMWBHK_WBGT_LIST_DISPLAY>-DOC_TYPE = 1.
<KOMWBHK_WBGT_LIST_DISPLAY>-DOC_TYPE_TEXT = 1.
<KOMWBHK_WBGT_LIST_DISPLAY>-VBELN = 1.
<KOMWBHK_WBGT_LIST_DISPLAY>-GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMWBHK_WBGT_LIST_DISPLAY-TKONN, sy-vline,
  WA_KOMWBHK_WBGT_LIST_DISPLAY-BTBSTA, sy-vline,
  WA_KOMWBHK_WBGT_LIST_DISPLAY-BEZEI_STATUS, sy-vline,
  WA_KOMWBHK_WBGT_LIST_DISPLAY-TCTYP, sy-vline,
  WA_KOMWBHK_WBGT_LIST_DISPLAY-BEZEI_TCTYP, sy-vline,
  WA_KOMWBHK_WBGT_LIST_DISPLAY-KUNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMWBHK_WBGT_LIST_DISPLAY 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_KOMWBHK_WBGT_LIST_DISPLAY 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_KOMWBHK_WBGT_LIST_DISPLAY INTO WA_KOMWBHK_WBGT_LIST_DISPLAY.


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

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

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

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMWBHK_WBGT_LIST_DISPLAY-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWBHK_WBGT_LIST_DISPLAY-KUNNR.
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_KOMWBHK_WBGT_LIST_DISPLAY_STR, 
MANDT TYPE STRING,
DOC_TYPE TYPE STRING,
DOC_TYPE_TEXT TYPE STRING,
VBELN TYPE STRING,
GJAHR TYPE STRING,
TKONN TYPE STRING,
BTBSTA TYPE STRING,
BEZEI_STATUS TYPE STRING,
TCTYP TYPE STRING,
BEZEI_TCTYP TYPE STRING,
KUNNR TYPE STRING,
BEZEI_KUNNR TYPE STRING,
TKWAERS TYPE STRING,
NETWR_SD TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
TKSACHB TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
TKONN_EX TYPE STRING,
TEW_TYPE TYPE STRING,
DEL_FLAG TYPE STRING,
NOMINATION_KEY TYPE STRING,
NOMINATION_ITEM TYPE STRING,
NOM_HEADER_ITEM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMWBHK_WBGT_LIST_DISPLAY_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_KOMWBHK_WBGT_LIST_DISPLAY_STR-MANDT sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-DOC_TYPE sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-DOC_TYPE_TEXT sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-VBELN sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-GJAHR sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-TKONN sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-BTBSTA sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-BEZEI_STATUS sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-TCTYP sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-BEZEI_TCTYP sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-KUNNR sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-BEZEI_KUNNR sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-TKWAERS sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-NETWR_SD sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-VKORG sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-VTWEG sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-SPART sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-TKSACHB sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-ERNAM sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-ERDAT sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-TKONN_EX sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-TEW_TYPE sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-DEL_FLAG sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-NOMINATION_KEY sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-NOMINATION_ITEM sy-vline 
WA_KOMWBHK_WBGT_LIST_DISPLAY_STR-NOM_HEADER_ITEM sy-vline      INTO ld_text SEPARATED BY SPACE.

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