ABAP Select data from SAP table DTADBEW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DTADBEW
*  INTO TABLE @DATA(IT_DTADBEW2).
*--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_DTADBEW INDEX 1 INTO DATA(WA_DTADBEW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DTADBEW>-W01 = 1.
<DTADBEW>-W02 = 1.
<DTADBEW>-W06 = 1.
<DTADBEW>-W18 = 1.
<DTADBEW>-W19 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DTADBEW-W31, sy-vline,
  WA_DTADBEW-W57, sy-vline,
  WA_DTADBEW-W72, sy-vline,
  WA_DTADBEW-W87, sy-vline,
  WA_DTADBEW-W99, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_DTADBEW 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_DTADBEW 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_DTADBEW INTO WA_DTADBEW.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_DTADBEW_STR, 
W01 TYPE STRING,
W02 TYPE STRING,
W06 TYPE STRING,
W18 TYPE STRING,
W19 TYPE STRING,
W31 TYPE STRING,
W57 TYPE STRING,
W72 TYPE STRING,
W87 TYPE STRING,
W99 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DTADBEW_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_DTADBEW_STR-W01 sy-vline 
WA_DTADBEW_STR-W02 sy-vline 
WA_DTADBEW_STR-W06 sy-vline 
WA_DTADBEW_STR-W18 sy-vline 
WA_DTADBEW_STR-W19 sy-vline 
WA_DTADBEW_STR-W31 sy-vline 
WA_DTADBEW_STR-W57 sy-vline 
WA_DTADBEW_STR-W72 sy-vline 
WA_DTADBEW_STR-W87 sy-vline 
WA_DTADBEW_STR-W99 sy-vline      INTO ld_text SEPARATED BY SPACE.

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