ABAP Select data from SAP table DD25D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DD25D 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 DD25D. 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 DD25D 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_DD25D TYPE STANDARD TABLE OF DD25D,
      WA_DD25D TYPE DD25D,
      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: <DD25D> TYPE DD25D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DD25D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DD25D
  INTO TABLE IT_DD25D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DD25D
*  INTO TABLE @DATA(IT_DD25D2).
*--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_DD25D INDEX 1 INTO DATA(WA_DD25D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DD25D ASSIGNING <DD25D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DD25D>-VIEWNAME = 1.
<DD25D>-VIEWGRANT = 1.
<DD25D>-ROOTTAB = 1.
<DD25D>-VIEWCLASS = 1.
<DD25D>-TABCLASS = 1.

ENDLOOP.

LOOP AT IT_DD25D INTO WA_DD25D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DD25D-DDTEXT, sy-vline,
  WA_DD25D-CONTFLAG, sy-vline,
  WA_DD25D-RFCENABLE, sy-vline,
  WA_DD25D-VIEWCLTEXT, sy-vline,
  WA_DD25D-EXISTTEXT, sy-vline,
  WA_DD25D-CUSTOMAUTH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DD25D 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_DD25D 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_DD25D INTO WA_DD25D.


*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_DD25D_STR, 
VIEWNAME TYPE STRING,
VIEWGRANT TYPE STRING,
ROOTTAB TYPE STRING,
VIEWCLASS TYPE STRING,
TABCLASS TYPE STRING,
DDTEXT TYPE STRING,
CONTFLAG TYPE STRING,
RFCENABLE TYPE STRING,
VIEWCLTEXT TYPE STRING,
EXISTTEXT TYPE STRING,
CUSTOMAUTH TYPE STRING,
CVIEW_INFO TYPE STRING,
UDENTITY TYPE STRING,
UDLONGTEXT TYPE STRING,
APPVIEW TYPE STRING,
GLOBALFLAG TYPE STRING,
CV_MAINT TYPE STRING,
CDSVIEW_SOURCE TYPE STRING,
CDSVIEW_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DD25D_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_DD25D_STR-VIEWNAME sy-vline 
WA_DD25D_STR-VIEWGRANT sy-vline 
WA_DD25D_STR-ROOTTAB sy-vline 
WA_DD25D_STR-VIEWCLASS sy-vline 
WA_DD25D_STR-TABCLASS sy-vline 
WA_DD25D_STR-DDTEXT sy-vline 
WA_DD25D_STR-CONTFLAG sy-vline 
WA_DD25D_STR-RFCENABLE sy-vline 
WA_DD25D_STR-VIEWCLTEXT sy-vline 
WA_DD25D_STR-EXISTTEXT sy-vline 
WA_DD25D_STR-CUSTOMAUTH sy-vline 
WA_DD25D_STR-CVIEW_INFO sy-vline 
WA_DD25D_STR-UDENTITY sy-vline 
WA_DD25D_STR-UDLONGTEXT sy-vline 
WA_DD25D_STR-APPVIEW sy-vline 
WA_DD25D_STR-GLOBALFLAG sy-vline 
WA_DD25D_STR-CV_MAINT sy-vline 
WA_DD25D_STR-CDSVIEW_SOURCE sy-vline 
WA_DD25D_STR-CDSVIEW_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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