ABAP Select data from SAP table DDTRINFMDS_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DDTRINFMDS_S
*  INTO TABLE @DATA(IT_DDTRINFMDS_S2).
*--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_DDTRINFMDS_S INDEX 1 INTO DATA(WA_DDTRINFMDS_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DDTRINFMDS_S>-TRKORR = 1.
<DDTRINFMDS_S>-LANGU = 1.
<DDTRINFMDS_S>-AS4TEXT = 1.
<DDTRINFMDS_S>-TRFUNCTION = 1.
<DDTRINFMDS_S>-TRSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DDTRINFMDS_S-TARSYSTEM, sy-vline,
  WA_DDTRINFMDS_S-KORRDEV, sy-vline,
  WA_DDTRINFMDS_S-AS4USER, sy-vline,
  WA_DDTRINFMDS_S-AS4DATE, sy-vline,
  WA_DDTRINFMDS_S-AS4TIME, sy-vline,
  WA_DDTRINFMDS_S-STRKORR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DDTRINFMDS_S 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_DDTRINFMDS_S 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_DDTRINFMDS_S INTO WA_DDTRINFMDS_S.


*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 LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_DDTRINFMDS_S-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DDTRINFMDS_S-LANGU.
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_DDTRINFMDS_S_STR, 
TRKORR TYPE STRING,
LANGU TYPE STRING,
AS4TEXT TYPE STRING,
TRFUNCTION TYPE STRING,
TRSTATUS TYPE STRING,
TARSYSTEM TYPE STRING,
KORRDEV TYPE STRING,
AS4USER TYPE STRING,
AS4DATE TYPE STRING,
AS4TIME TYPE STRING,
STRKORR TYPE STRING,
AS4POS TYPE STRING,
OBJ_NAME TYPE STRING,
KZ_MDS_TBL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DDTRINFMDS_S_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_DDTRINFMDS_S_STR-TRKORR sy-vline 
WA_DDTRINFMDS_S_STR-LANGU sy-vline 
WA_DDTRINFMDS_S_STR-AS4TEXT sy-vline 
WA_DDTRINFMDS_S_STR-TRFUNCTION sy-vline 
WA_DDTRINFMDS_S_STR-TRSTATUS sy-vline 
WA_DDTRINFMDS_S_STR-TARSYSTEM sy-vline 
WA_DDTRINFMDS_S_STR-KORRDEV sy-vline 
WA_DDTRINFMDS_S_STR-AS4USER sy-vline 
WA_DDTRINFMDS_S_STR-AS4DATE sy-vline 
WA_DDTRINFMDS_S_STR-AS4TIME sy-vline 
WA_DDTRINFMDS_S_STR-STRKORR sy-vline 
WA_DDTRINFMDS_S_STR-AS4POS sy-vline 
WA_DDTRINFMDS_S_STR-OBJ_NAME sy-vline 
WA_DDTRINFMDS_S_STR-KZ_MDS_TBL sy-vline      INTO ld_text SEPARATED BY SPACE.

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