ABAP Select data from SAP table DMS_DATA_CARRIER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DMS_DATA_CARRIER
*  INTO TABLE @DATA(IT_DMS_DATA_CARRIER2).
*--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_DMS_DATA_CARRIER INDEX 1 INTO DATA(WA_DMS_DATA_CARRIER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DMS_DATA_CARRIER>-TYPDT = 1.
<DMS_DATA_CARRIER>-ONLIN = 1.
<DMS_DATA_CARRIER>-DPRIN = 1.
<DMS_DATA_CARRIER>-ARCHV = 1.
<DMS_DATA_CARRIER>-ADRTP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DMS_DATA_CARRIER-CADSY, sy-vline,
  WA_DMS_DATA_CARRIER-CVTEXT, sy-vline,
  WA_DMS_DATA_CARRIER-FILEP, sy-vline,
  WA_DMS_DATA_CARRIER-DSERV, sy-vline,
  WA_DMS_DATA_CARRIER-THIRDP, sy-vline,
  WA_DMS_DATA_CARRIER-KPRO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DMS_DATA_CARRIER 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_DMS_DATA_CARRIER 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_DMS_DATA_CARRIER INTO WA_DMS_DATA_CARRIER.


*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_DMS_DATA_CARRIER_STR, 
TYPDT TYPE STRING,
ONLIN TYPE STRING,
DPRIN TYPE STRING,
ARCHV TYPE STRING,
ADRTP TYPE STRING,
CADSY TYPE STRING,
CVTEXT TYPE STRING,
FILEP TYPE STRING,
DSERV TYPE STRING,
THIRDP TYPE STRING,
KPRO TYPE STRING,
NTADR TYPE STRING,
SERVERPATH TYPE STRING,
FTP_CNAME TYPE STRING,
DTTRG TYPE STRING,
PRFXP TYPE STRING,
STORAGE_TYPE TYPE STRING,
INACTIVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DMS_DATA_CARRIER_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_DMS_DATA_CARRIER_STR-TYPDT sy-vline 
WA_DMS_DATA_CARRIER_STR-ONLIN sy-vline 
WA_DMS_DATA_CARRIER_STR-DPRIN sy-vline 
WA_DMS_DATA_CARRIER_STR-ARCHV sy-vline 
WA_DMS_DATA_CARRIER_STR-ADRTP sy-vline 
WA_DMS_DATA_CARRIER_STR-CADSY sy-vline 
WA_DMS_DATA_CARRIER_STR-CVTEXT sy-vline 
WA_DMS_DATA_CARRIER_STR-FILEP sy-vline 
WA_DMS_DATA_CARRIER_STR-DSERV sy-vline 
WA_DMS_DATA_CARRIER_STR-THIRDP sy-vline 
WA_DMS_DATA_CARRIER_STR-KPRO sy-vline 
WA_DMS_DATA_CARRIER_STR-NTADR sy-vline 
WA_DMS_DATA_CARRIER_STR-SERVERPATH sy-vline 
WA_DMS_DATA_CARRIER_STR-FTP_CNAME sy-vline 
WA_DMS_DATA_CARRIER_STR-DTTRG sy-vline 
WA_DMS_DATA_CARRIER_STR-PRFXP sy-vline 
WA_DMS_DATA_CARRIER_STR-STORAGE_TYPE sy-vline 
WA_DMS_DATA_CARRIER_STR-INACTIVE sy-vline      INTO ld_text SEPARATED BY SPACE.

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