ABAP Select data from SAP table DCOUTPUT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DCOUTPUT
*  INTO TABLE @DATA(IT_DCOUTPUT2).
*--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_DCOUTPUT INDEX 1 INTO DATA(WA_DCOUTPUT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DCOUTPUT>-OUTPUTLEN = 1.
<DCOUTPUT>-MAXOUTPLEN = 1.
<DCOUTPUT>-LOWERCASE = 1.
<DCOUTPUT>-TYPSIGN = 1.
<DCOUTPUT>-CONVPERMIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DCOUTPUT-CONVEXIT, sy-vline,
  WA_DCOUTPUT-OUTPUTSTYLE, sy-vline,
  WA_DCOUTPUT-MEMORYID, sy-vline,
  WA_DCOUTPUT-MEMPERMIT, sy-vline,
  WA_DCOUTPUT-BIDIPERMIT, sy-vline,
  WA_DCOUTPUT-LTRPERMIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DCOUTPUT 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_DCOUTPUT 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_DCOUTPUT INTO WA_DCOUTPUT.


*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_DCOUTPUT_STR, 
OUTPUTLEN TYPE STRING,
MAXOUTPLEN TYPE STRING,
LOWERCASE TYPE STRING,
TYPSIGN TYPE STRING,
CONVPERMIT TYPE STRING,
CONVEXIT TYPE STRING,
OUTPUTSTYLE TYPE STRING,
MEMORYID TYPE STRING,
MEMPERMIT TYPE STRING,
BIDIPERMIT TYPE STRING,
LTRPERMIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DCOUTPUT_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_DCOUTPUT_STR-OUTPUTLEN sy-vline 
WA_DCOUTPUT_STR-MAXOUTPLEN sy-vline 
WA_DCOUTPUT_STR-LOWERCASE sy-vline 
WA_DCOUTPUT_STR-TYPSIGN sy-vline 
WA_DCOUTPUT_STR-CONVPERMIT sy-vline 
WA_DCOUTPUT_STR-CONVEXIT sy-vline 
WA_DCOUTPUT_STR-OUTPUTSTYLE sy-vline 
WA_DCOUTPUT_STR-MEMORYID sy-vline 
WA_DCOUTPUT_STR-MEMPERMIT sy-vline 
WA_DCOUTPUT_STR-BIDIPERMIT sy-vline 
WA_DCOUTPUT_STR-LTRPERMIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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