ABAP Select data from SAP table MDS_S4_DD03L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDS_S4_DD03L 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 MDS_S4_DD03L. 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 MDS_S4_DD03L 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_MDS_S4_DD03L TYPE STANDARD TABLE OF MDS_S4_DD03L,
      WA_MDS_S4_DD03L TYPE MDS_S4_DD03L,
      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: <MDS_S4_DD03L> TYPE MDS_S4_DD03L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MDS_S4_DD03L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MDS_S4_DD03L
  INTO TABLE IT_MDS_S4_DD03L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDS_S4_DD03L
*  INTO TABLE @DATA(IT_MDS_S4_DD03L2).
*--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_MDS_S4_DD03L INDEX 1 INTO DATA(WA_MDS_S4_DD03L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MDS_S4_DD03L ASSIGNING <MDS_S4_DD03L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDS_S4_DD03L>-MT_ID = 1.
<MDS_S4_DD03L>-SENDER_RECEIVER = 1.
<MDS_S4_DD03L>-TABNAME = 1.
<MDS_S4_DD03L>-FIELDNAME = 1.
<MDS_S4_DD03L>-AS4LOCAL = 1.

ENDLOOP.

LOOP AT IT_MDS_S4_DD03L INTO WA_MDS_S4_DD03L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDS_S4_DD03L-AS4VERS, sy-vline,
  WA_MDS_S4_DD03L-POS, sy-vline,
  WA_MDS_S4_DD03L-KEYFLAG, sy-vline,
  WA_MDS_S4_DD03L-MANDATORY, sy-vline,
  WA_MDS_S4_DD03L-ROLLNAME, sy-vline,
  WA_MDS_S4_DD03L-CHECKTABLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDS_S4_DD03L 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_MDS_S4_DD03L 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_MDS_S4_DD03L INTO WA_MDS_S4_DD03L.


*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_MDS_S4_DD03L_STR, 
MT_ID TYPE STRING,
SENDER_RECEIVER TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
AS4LOCAL TYPE STRING,
AS4VERS TYPE STRING,
POS 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,
NOTNULL TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
DECIMALS TYPE STRING,
DOMNAME TYPE STRING,
SHLPORIGIN TYPE STRING,
TABLETYPE TYPE STRING,
DEPTH TYPE STRING,
COMPTYPE TYPE STRING,
REFTYPE TYPE STRING,
LANGUFLAG TYPE STRING,
DBPOSITION TYPE STRING,
ANONYMOUS TYPE STRING,
OUTPUTSTYLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDS_S4_DD03L_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_MDS_S4_DD03L_STR-MT_ID sy-vline 
WA_MDS_S4_DD03L_STR-SENDER_RECEIVER sy-vline 
WA_MDS_S4_DD03L_STR-TABNAME sy-vline 
WA_MDS_S4_DD03L_STR-FIELDNAME sy-vline 
WA_MDS_S4_DD03L_STR-AS4LOCAL sy-vline 
WA_MDS_S4_DD03L_STR-AS4VERS sy-vline 
WA_MDS_S4_DD03L_STR-POS sy-vline 
WA_MDS_S4_DD03L_STR-KEYFLAG sy-vline 
WA_MDS_S4_DD03L_STR-MANDATORY sy-vline 
WA_MDS_S4_DD03L_STR-ROLLNAME sy-vline 
WA_MDS_S4_DD03L_STR-CHECKTABLE sy-vline 
WA_MDS_S4_DD03L_STR-ADMINFIELD sy-vline 
WA_MDS_S4_DD03L_STR-INTTYPE sy-vline 
WA_MDS_S4_DD03L_STR-INTLEN sy-vline 
WA_MDS_S4_DD03L_STR-REFTABLE sy-vline 
WA_MDS_S4_DD03L_STR-PRECFIELD sy-vline 
WA_MDS_S4_DD03L_STR-REFFIELD sy-vline 
WA_MDS_S4_DD03L_STR-CONROUT sy-vline 
WA_MDS_S4_DD03L_STR-NOTNULL sy-vline 
WA_MDS_S4_DD03L_STR-DATATYPE sy-vline 
WA_MDS_S4_DD03L_STR-LENG sy-vline 
WA_MDS_S4_DD03L_STR-DECIMALS sy-vline 
WA_MDS_S4_DD03L_STR-DOMNAME sy-vline 
WA_MDS_S4_DD03L_STR-SHLPORIGIN sy-vline 
WA_MDS_S4_DD03L_STR-TABLETYPE sy-vline 
WA_MDS_S4_DD03L_STR-DEPTH sy-vline 
WA_MDS_S4_DD03L_STR-COMPTYPE sy-vline 
WA_MDS_S4_DD03L_STR-REFTYPE sy-vline 
WA_MDS_S4_DD03L_STR-LANGUFLAG sy-vline 
WA_MDS_S4_DD03L_STR-DBPOSITION sy-vline 
WA_MDS_S4_DD03L_STR-ANONYMOUS sy-vline 
WA_MDS_S4_DD03L_STR-OUTPUTSTYLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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