ABAP Select data from SAP table DDUDMPAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DDUDMPAR
*  INTO TABLE @DATA(IT_DDUDMPAR2).
*--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_DDUDMPAR INDEX 1 INTO DATA(WA_DDUDMPAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DDUDMPAR>-CALLER = 1.
<DDUDMPAR>-ENTID = 1.
<DDUDMPAR>-VERSION = 1.
<DDUDMPAR>-VARIANT = 1.
<DDUDMPAR>-KURZBEZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DDUDMPAR-LANGBEZ, sy-vline,
  WA_DDUDMPAR-EATTID, sy-vline,
  WA_DDUDMPAR-VERSIONA, sy-vline,
  WA_DDUDMPAR-KURZBEZA, sy-vline,
  WA_DDUDMPAR-LANGBEZA, sy-vline,
  WA_DDUDMPAR-EAPOS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DDUDMPAR 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_DDUDMPAR 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_DDUDMPAR INTO WA_DDUDMPAR.


*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_DDUDMPAR-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DDUDMPAR-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_DDUDMPAR_STR, 
CALLER TYPE STRING,
ENTID TYPE STRING,
VERSION TYPE STRING,
VARIANT TYPE STRING,
KURZBEZ TYPE STRING,
LANGBEZ TYPE STRING,
EATTID TYPE STRING,
VERSIONA TYPE STRING,
KURZBEZA TYPE STRING,
LANGBEZA TYPE STRING,
EAPOS TYPE STRING,
ROLLNAME TYPE STRING,
DOMNAME TYPE STRING,
DDTEXT TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
CHECKTABLE TYPE STRING,
GRUNDSICHT TYPE STRING,
KRZTXTVOLL TYPE STRING,
DOMAININFO TYPE STRING,
SAVED TYPE STRING,
FLAG2 TYPE STRING,
UMSETZFLAG TYPE STRING,
READONLY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DDUDMPAR_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_DDUDMPAR_STR-CALLER sy-vline 
WA_DDUDMPAR_STR-ENTID sy-vline 
WA_DDUDMPAR_STR-VERSION sy-vline 
WA_DDUDMPAR_STR-VARIANT sy-vline 
WA_DDUDMPAR_STR-KURZBEZ sy-vline 
WA_DDUDMPAR_STR-LANGBEZ sy-vline 
WA_DDUDMPAR_STR-EATTID sy-vline 
WA_DDUDMPAR_STR-VERSIONA sy-vline 
WA_DDUDMPAR_STR-KURZBEZA sy-vline 
WA_DDUDMPAR_STR-LANGBEZA sy-vline 
WA_DDUDMPAR_STR-EAPOS sy-vline 
WA_DDUDMPAR_STR-ROLLNAME sy-vline 
WA_DDUDMPAR_STR-DOMNAME sy-vline 
WA_DDUDMPAR_STR-DDTEXT sy-vline 
WA_DDUDMPAR_STR-DATATYPE sy-vline 
WA_DDUDMPAR_STR-LENG sy-vline 
WA_DDUDMPAR_STR-CHECKTABLE sy-vline 
WA_DDUDMPAR_STR-GRUNDSICHT sy-vline 
WA_DDUDMPAR_STR-KRZTXTVOLL sy-vline 
WA_DDUDMPAR_STR-DOMAININFO sy-vline 
WA_DDUDMPAR_STR-SAVED sy-vline 
WA_DDUDMPAR_STR-FLAG2 sy-vline 
WA_DDUDMPAR_STR-UMSETZFLAG sy-vline 
WA_DDUDMPAR_STR-READONLY sy-vline      INTO ld_text SEPARATED BY SPACE.

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