ABAP Select data from SAP table DIS_TOBJS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DIS_TOBJS
*  INTO TABLE @DATA(IT_DIS_TOBJS2).
*--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_DIS_TOBJS INDEX 1 INTO DATA(WA_DIS_TOBJS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DIS_TOBJS>-MANDT = 1.
<DIS_TOBJS>-GRPNR = 1.
<DIS_TOBJS>-ASS_OBJNR = 1.
<DIS_TOBJS>-OBJNR = 1.
<DIS_TOBJS>-WRTTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DIS_TOBJS-VRGNG, sy-vline,
  WA_DIS_TOBJS-KSTAR, sy-vline,
  WA_DIS_TOBJS-POSIT, sy-vline,
  WA_DIS_TOBJS-USPOB, sy-vline,
  WA_DIS_TOBJS-WAERS, sy-vline,
  WA_DIS_TOBJS-HRKFT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DIS_TOBJS 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_DIS_TOBJS 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_DIS_TOBJS INTO WA_DIS_TOBJS.


*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 ABPSP, internal->external for field GRPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_DIS_TOBJS-GRPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIS_TOBJS-GRPNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DIS_TOBJS-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIS_TOBJS-MEINS.
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_DIS_TOBJS_STR, 
MANDT TYPE STRING,
GRPNR TYPE STRING,
ASS_OBJNR TYPE STRING,
OBJNR TYPE STRING,
WRTTP TYPE STRING,
VRGNG TYPE STRING,
KSTAR TYPE STRING,
POSIT TYPE STRING,
USPOB TYPE STRING,
WAERS TYPE STRING,
HRKFT TYPE STRING,
GJAHR TYPE STRING,
BEKNZ TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
WTG TYPE STRING,
WOG TYPE STRING,
WKG TYPE STRING,
MEG TYPE STRING,
MEINS TYPE STRING,
LOEVM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DIS_TOBJS_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_DIS_TOBJS_STR-MANDT sy-vline 
WA_DIS_TOBJS_STR-GRPNR sy-vline 
WA_DIS_TOBJS_STR-ASS_OBJNR sy-vline 
WA_DIS_TOBJS_STR-OBJNR sy-vline 
WA_DIS_TOBJS_STR-WRTTP sy-vline 
WA_DIS_TOBJS_STR-VRGNG sy-vline 
WA_DIS_TOBJS_STR-KSTAR sy-vline 
WA_DIS_TOBJS_STR-POSIT sy-vline 
WA_DIS_TOBJS_STR-USPOB sy-vline 
WA_DIS_TOBJS_STR-WAERS sy-vline 
WA_DIS_TOBJS_STR-HRKFT sy-vline 
WA_DIS_TOBJS_STR-GJAHR sy-vline 
WA_DIS_TOBJS_STR-BEKNZ sy-vline 
WA_DIS_TOBJS_STR-BUKRS sy-vline 
WA_DIS_TOBJS_STR-GSBER sy-vline 
WA_DIS_TOBJS_STR-WTG sy-vline 
WA_DIS_TOBJS_STR-WOG sy-vline 
WA_DIS_TOBJS_STR-WKG sy-vline 
WA_DIS_TOBJS_STR-MEG sy-vline 
WA_DIS_TOBJS_STR-MEINS sy-vline 
WA_DIS_TOBJS_STR-LOEVM sy-vline      INTO ld_text SEPARATED BY SPACE.

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