ABAP Select data from SAP table KOMWBGT_REC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KOMWBGT_REC
*  INTO TABLE @DATA(IT_KOMWBGT_REC2).
*--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_KOMWBGT_REC INDEX 1 INTO DATA(WA_KOMWBGT_REC2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KOMWBGT_REC-ERNAM, sy-vline,
  WA_KOMWBGT_REC-ERDAT, sy-vline,
  WA_KOMWBGT_REC-TEW_TYPE, sy-vline,
  WA_KOMWBGT_REC-MASTER_STEP, sy-vline,
  WA_KOMWBGT_REC-SCENARIO, sy-vline,
  WA_KOMWBGT_REC-BUSINESS_STEP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KOMWBGT_REC 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_KOMWBGT_REC 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_KOMWBGT_REC INTO WA_KOMWBGT_REC.


*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_KOMWBGT_REC-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWBGT_REC-VBELN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field TKONN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KOMWBGT_REC-TKONN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KOMWBGT_REC-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_KOMWBGT_REC_STR, 
MANDT TYPE STRING,
DOC_TYPE TYPE STRING,
VBELN TYPE STRING,
GJAHR TYPE STRING,
TKONN TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
TEW_TYPE TYPE STRING,
MASTER_STEP TYPE STRING,
SCENARIO TYPE STRING,
BUSINESS_STEP TYPE STRING,
TKONN_EX TYPE STRING,
COMPLETE TYPE STRING,
ERROR_TEW TYPE STRING,
PRE_STEP TYPE STRING,
ORIGINAL_STEP TYPE STRING,
TEW_MODE TYPE STRING,
DEL_FLAG TYPE STRING,
REL_FLAG TYPE STRING,
SEND_COMPL TYPE STRING,
EXP_DOC_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KOMWBGT_REC_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_KOMWBGT_REC_STR-MANDT sy-vline 
WA_KOMWBGT_REC_STR-DOC_TYPE sy-vline 
WA_KOMWBGT_REC_STR-VBELN sy-vline 
WA_KOMWBGT_REC_STR-GJAHR sy-vline 
WA_KOMWBGT_REC_STR-TKONN sy-vline 
WA_KOMWBGT_REC_STR-ERNAM sy-vline 
WA_KOMWBGT_REC_STR-ERDAT sy-vline 
WA_KOMWBGT_REC_STR-TEW_TYPE sy-vline 
WA_KOMWBGT_REC_STR-MASTER_STEP sy-vline 
WA_KOMWBGT_REC_STR-SCENARIO sy-vline 
WA_KOMWBGT_REC_STR-BUSINESS_STEP sy-vline 
WA_KOMWBGT_REC_STR-TKONN_EX sy-vline 
WA_KOMWBGT_REC_STR-COMPLETE sy-vline 
WA_KOMWBGT_REC_STR-ERROR_TEW sy-vline 
WA_KOMWBGT_REC_STR-PRE_STEP sy-vline 
WA_KOMWBGT_REC_STR-ORIGINAL_STEP sy-vline 
WA_KOMWBGT_REC_STR-TEW_MODE sy-vline 
WA_KOMWBGT_REC_STR-DEL_FLAG sy-vline 
WA_KOMWBGT_REC_STR-REL_FLAG sy-vline 
WA_KOMWBGT_REC_STR-SEND_COMPL sy-vline 
WA_KOMWBGT_REC_STR-EXP_DOC_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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