ABAP Select data from SAP table DD03N into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DD03N 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 DD03N. 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 DD03N 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_DD03N TYPE STANDARD TABLE OF DD03N,
      WA_DD03N TYPE DD03N,
      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: <DD03N> TYPE DD03N.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DD03N.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DD03N
  INTO TABLE IT_DD03N.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DD03N
*  INTO TABLE @DATA(IT_DD03N2).
*--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_DD03N INDEX 1 INTO DATA(WA_DD03N2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DD03N ASSIGNING <DD03N>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DD03N>-TABNAME = 1.
<DD03N>-FIELDNAME = 1.
<DD03N>-FLDSTAT = 1.
<DD03N>-ROLLSTAT = 1.
<DD03N>-DOMSTAT = 1.

ENDLOOP.

LOOP AT IT_DD03N INTO WA_DD03N.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DD03N-POSITION, sy-vline,
  WA_DD03N-KEYFLAG, sy-vline,
  WA_DD03N-MANDATORY, sy-vline,
  WA_DD03N-ROLLNAME, sy-vline,
  WA_DD03N-CHECKTABLE, sy-vline,
  WA_DD03N-ADMINFIELD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DD03N 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_DD03N 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_DD03N INTO WA_DD03N.


*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 ISOLA, internal->external for field DTELMASTER
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DD03N-DTELMASTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD03N-DTELMASTER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DD03N-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD03N-DATATYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field DOMMASTER
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DD03N-DOMMASTER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DD03N-DOMMASTER.
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_DD03N_STR, 
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
FLDSTAT TYPE STRING,
ROLLSTAT TYPE STRING,
DOMSTAT TYPE STRING,
POSITION TYPE STRING,
KEYFLAG TYPE STRING,
MANDATORY TYPE STRING,
ROLLNAME TYPE STRING,
CHECKTABLE TYPE STRING,
ADMINFIELD TYPE STRING,
INTTYPE TYPE STRING,
INTLEN TYPE STRING,
REFTABLE TYPE STRING,
PRECFIELD TYPE STRING,
REFFIELD TYPE STRING,
CONROUT TYPE STRING,
DOMNAME TYPE STRING,
ROUTPUTLEN TYPE STRING,
MEMORYID TYPE STRING,
LOGFLAG TYPE STRING,
HEADLEN TYPE STRING,
SCRLEN1 TYPE STRING,
SCRLEN2 TYPE STRING,
SCRLEN3 TYPE STRING,
ACTFLAG TYPE STRING,
APPLCLASS TYPE STRING,
AUTHCLASS TYPE STRING,
AS4USER TYPE STRING,
AS4DATE TYPE STRING,
AS4TIME TYPE STRING,
DTELMASTER TYPE STRING,
RESERVEDTE TYPE STRING,
DTELGLOBAL TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
OUTPUTLEN TYPE STRING,
DECIMALS TYPE STRING,
LOWERCASE TYPE STRING,
SIGNFLAG TYPE STRING,
LANGFLAG TYPE STRING,
VALEXI TYPE STRING,
ENTITYTAB TYPE STRING,
CONVEXIT TYPE STRING,
MASK TYPE STRING,
MASKLEN TYPE STRING,
ACTFLAG1 TYPE STRING,
APPLCLASS1 TYPE STRING,
AUTHCLASS1 TYPE STRING,
AS4USER1 TYPE STRING,
AS4DATE1 TYPE STRING,
AS4TIME1 TYPE STRING,
DOMMASTER TYPE STRING,
RESERVEDOM TYPE STRING,
DOMGLOBAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DD03N_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_DD03N_STR-TABNAME sy-vline 
WA_DD03N_STR-FIELDNAME sy-vline 
WA_DD03N_STR-FLDSTAT sy-vline 
WA_DD03N_STR-ROLLSTAT sy-vline 
WA_DD03N_STR-DOMSTAT sy-vline 
WA_DD03N_STR-POSITION sy-vline 
WA_DD03N_STR-KEYFLAG sy-vline 
WA_DD03N_STR-MANDATORY sy-vline 
WA_DD03N_STR-ROLLNAME sy-vline 
WA_DD03N_STR-CHECKTABLE sy-vline 
WA_DD03N_STR-ADMINFIELD sy-vline 
WA_DD03N_STR-INTTYPE sy-vline 
WA_DD03N_STR-INTLEN sy-vline 
WA_DD03N_STR-REFTABLE sy-vline 
WA_DD03N_STR-PRECFIELD sy-vline 
WA_DD03N_STR-REFFIELD sy-vline 
WA_DD03N_STR-CONROUT sy-vline 
WA_DD03N_STR-DOMNAME sy-vline 
WA_DD03N_STR-ROUTPUTLEN sy-vline 
WA_DD03N_STR-MEMORYID sy-vline 
WA_DD03N_STR-LOGFLAG sy-vline 
WA_DD03N_STR-HEADLEN sy-vline 
WA_DD03N_STR-SCRLEN1 sy-vline 
WA_DD03N_STR-SCRLEN2 sy-vline 
WA_DD03N_STR-SCRLEN3 sy-vline 
WA_DD03N_STR-ACTFLAG sy-vline 
WA_DD03N_STR-APPLCLASS sy-vline 
WA_DD03N_STR-AUTHCLASS sy-vline 
WA_DD03N_STR-AS4USER sy-vline 
WA_DD03N_STR-AS4DATE sy-vline 
WA_DD03N_STR-AS4TIME sy-vline 
WA_DD03N_STR-DTELMASTER sy-vline 
WA_DD03N_STR-RESERVEDTE sy-vline 
WA_DD03N_STR-DTELGLOBAL sy-vline 
WA_DD03N_STR-DATATYPE sy-vline 
WA_DD03N_STR-LENG sy-vline 
WA_DD03N_STR-OUTPUTLEN sy-vline 
WA_DD03N_STR-DECIMALS sy-vline 
WA_DD03N_STR-LOWERCASE sy-vline 
WA_DD03N_STR-SIGNFLAG sy-vline 
WA_DD03N_STR-LANGFLAG sy-vline 
WA_DD03N_STR-VALEXI sy-vline 
WA_DD03N_STR-ENTITYTAB sy-vline 
WA_DD03N_STR-CONVEXIT sy-vline 
WA_DD03N_STR-MASK sy-vline 
WA_DD03N_STR-MASKLEN sy-vline 
WA_DD03N_STR-ACTFLAG1 sy-vline 
WA_DD03N_STR-APPLCLASS1 sy-vline 
WA_DD03N_STR-AUTHCLASS1 sy-vline 
WA_DD03N_STR-AS4USER1 sy-vline 
WA_DD03N_STR-AS4DATE1 sy-vline 
WA_DD03N_STR-AS4TIME1 sy-vline 
WA_DD03N_STR-DOMMASTER sy-vline 
WA_DD03N_STR-RESERVEDOM sy-vline 
WA_DD03N_STR-DOMGLOBAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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