ABAP Select data from SAP table DD03D into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DD03D 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 DD03D. 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 DD03D 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_DD03D TYPE STANDARD TABLE OF DD03D,
      WA_DD03D TYPE DD03D,
      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: <DD03D> TYPE DD03D.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DD03D.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DD03D
  INTO TABLE IT_DD03D.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DD03D
*  INTO TABLE @DATA(IT_DD03D2).
*--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_DD03D INDEX 1 INTO DATA(WA_DD03D2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DD03D ASSIGNING <DD03D>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DD03D>-FIELDNAME = 1.
<DD03D>-KEYFLAG = 1.
<DD03D>-ROLLNAME = 1.
<DD03D>-DOMNAME = 1.
<DD03D>-CHECKTABLE = 1.

ENDLOOP.

LOOP AT IT_DD03D INTO WA_DD03D.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DD03D-REFTABLE, sy-vline,
  WA_DD03D-REFFIELD, sy-vline,
  WA_DD03D-DATATYPE, sy-vline,
  WA_DD03D-LENG, sy-vline,
  WA_DD03D-ENTITYTAB, sy-vline,
  WA_DD03D-DDTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DD03D 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_DD03D 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_DD03D INTO WA_DD03D.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DD03D-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD03D-DATATYPE.
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_DD03D_STR, 
FIELDNAME TYPE STRING,
KEYFLAG TYPE STRING,
ROLLNAME TYPE STRING,
DOMNAME TYPE STRING,
CHECKTABLE TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
ENTITYTAB TYPE STRING,
DDTEXT TYPE STRING,
INTTYPE TYPE STRING,
INTLEN TYPE STRING,
NOTNULL TYPE STRING,
DECIMALS TYPE STRING,
NULLABLE TYPE STRING,
INDXFIELD TYPE STRING,
DEFFDNAME TYPE STRING,
TYPENAME TYPE STRING,
GROUPNAME TYPE STRING,
VALEXI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DD03D_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_DD03D_STR-FIELDNAME sy-vline 
WA_DD03D_STR-KEYFLAG sy-vline 
WA_DD03D_STR-ROLLNAME sy-vline 
WA_DD03D_STR-DOMNAME sy-vline 
WA_DD03D_STR-CHECKTABLE sy-vline 
WA_DD03D_STR-REFTABLE sy-vline 
WA_DD03D_STR-REFFIELD sy-vline 
WA_DD03D_STR-DATATYPE sy-vline 
WA_DD03D_STR-LENG sy-vline 
WA_DD03D_STR-ENTITYTAB sy-vline 
WA_DD03D_STR-DDTEXT sy-vline 
WA_DD03D_STR-INTTYPE sy-vline 
WA_DD03D_STR-INTLEN sy-vline 
WA_DD03D_STR-NOTNULL sy-vline 
WA_DD03D_STR-DECIMALS sy-vline 
WA_DD03D_STR-NULLABLE sy-vline 
WA_DD03D_STR-INDXFIELD sy-vline 
WA_DD03D_STR-DEFFDNAME sy-vline 
WA_DD03D_STR-TYPENAME sy-vline 
WA_DD03D_STR-GROUPNAME sy-vline 
WA_DD03D_STR-VALEXI sy-vline      INTO ld_text SEPARATED BY SPACE.

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