ABAP Select data from SAP table DWN05 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DWN05 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 DWN05. 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 DWN05 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_DWN05 TYPE STANDARD TABLE OF DWN05,
      WA_DWN05 TYPE DWN05,
      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: <DWN05> TYPE DWN05.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DWN05.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DWN05
  INTO TABLE IT_DWN05.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DWN05
*  INTO TABLE @DATA(IT_DWN052).
*--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_DWN05 INDEX 1 INTO DATA(WA_DWN052).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DWN05 ASSIGNING <DWN05>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DWN05>-ARBPL = 1.
<DWN05>-WERKS = 1.
<DWN05>-WTEXT = 1.
<DWN05>-KOSTL = 1.
<DWN05>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_DWN05 INTO WA_DWN05.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DWN05-ENDDA, sy-vline,
  WA_DWN05-BDEGR, sy-vline,
  WA_DWN05-VGW01, sy-vline,
  WA_DWN05-MAS01, sy-vline,
  WA_DWN05-VGS01, sy-vline,
  WA_DWN05-VGW02, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DWN05 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_DWN05 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_DWN05 INTO WA_DWN05.


*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 KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DWN05-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DWN05-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MAS01
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DWN05-MAS01
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DWN05-MAS01.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MAS02
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DWN05-MAS02
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DWN05-MAS02.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MAS03
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DWN05-MAS03
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DWN05-MAS03.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MAS04
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DWN05-MAS04
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DWN05-MAS04.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MAS05
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DWN05-MAS05
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DWN05-MAS05.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MAS06
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DWN05-MAS06
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DWN05-MAS06.
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_DWN05_STR, 
ARBPL TYPE STRING,
WERKS TYPE STRING,
WTEXT TYPE STRING,
KOSTL TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
BDEGR TYPE STRING,
VGW01 TYPE STRING,
MAS01 TYPE STRING,
VGS01 TYPE STRING,
VGW02 TYPE STRING,
MAS02 TYPE STRING,
VGS02 TYPE STRING,
VGW03 TYPE STRING,
MAS03 TYPE STRING,
VGS03 TYPE STRING,
VGW04 TYPE STRING,
MAS04 TYPE STRING,
VGS04 TYPE STRING,
VGW05 TYPE STRING,
MAS05 TYPE STRING,
VGS05 TYPE STRING,
VGW06 TYPE STRING,
MAS06 TYPE STRING,
VGS06 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DWN05_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_DWN05_STR-ARBPL sy-vline 
WA_DWN05_STR-WERKS sy-vline 
WA_DWN05_STR-WTEXT sy-vline 
WA_DWN05_STR-KOSTL sy-vline 
WA_DWN05_STR-BEGDA sy-vline 
WA_DWN05_STR-ENDDA sy-vline 
WA_DWN05_STR-BDEGR sy-vline 
WA_DWN05_STR-VGW01 sy-vline 
WA_DWN05_STR-MAS01 sy-vline 
WA_DWN05_STR-VGS01 sy-vline 
WA_DWN05_STR-VGW02 sy-vline 
WA_DWN05_STR-MAS02 sy-vline 
WA_DWN05_STR-VGS02 sy-vline 
WA_DWN05_STR-VGW03 sy-vline 
WA_DWN05_STR-MAS03 sy-vline 
WA_DWN05_STR-VGS03 sy-vline 
WA_DWN05_STR-VGW04 sy-vline 
WA_DWN05_STR-MAS04 sy-vline 
WA_DWN05_STR-VGS04 sy-vline 
WA_DWN05_STR-VGW05 sy-vline 
WA_DWN05_STR-MAS05 sy-vline 
WA_DWN05_STR-VGS05 sy-vline 
WA_DWN05_STR-VGW06 sy-vline 
WA_DWN05_STR-MAS06 sy-vline 
WA_DWN05_STR-VGS06 sy-vline      INTO ld_text SEPARATED BY SPACE.

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