ABAP Select data from SAP table /CIDCAD/DISPLAY_COPY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /CIDCAD/DISPLAY_COPY 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 /CIDCAD/DISPLAY_COPY. 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 /CIDCAD/DISPLAY_COPY 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_/CIDCAD/DISPLAY_COPY TYPE STANDARD TABLE OF /CIDCAD/DISPLAY_COPY,
      WA_/CIDCAD/DISPLAY_COPY TYPE /CIDCAD/DISPLAY_COPY,
      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: </CIDCAD/DISPLAY_COPY> TYPE /CIDCAD/DISPLAY_COPY.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /CIDCAD/DISPLAY_COPY
  INTO TABLE IT_/CIDCAD/DISPLAY_COPY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /CIDCAD/DISPLAY_COPY
*  INTO TABLE @DATA(IT_/CIDCAD/DISPLAY_COPY2).
*--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_/CIDCAD/DISPLAY_COPY INDEX 1 INTO DATA(WA_/CIDCAD/DISPLAY_COPY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/CIDCAD/DISPLAY_COPY ASSIGNING </CIDCAD/DISPLAY_COPY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</CIDCAD/DISPLAY_COPY>-DOCUMENTTYPE = 1.
</CIDCAD/DISPLAY_COPY>-DOCUMENTNUMBER = 1.
</CIDCAD/DISPLAY_COPY>-DOCUMENTVERSION = 1.
</CIDCAD/DISPLAY_COPY>-DOCUMENTPART = 1.
</CIDCAD/DISPLAY_COPY>-DESCRIPTION = 1.

ENDLOOP.

LOOP AT IT_/CIDCAD/DISPLAY_COPY INTO WA_/CIDCAD/DISPLAY_COPY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/CIDCAD/DISPLAY_COPY-USERNAME, sy-vline,
  WA_/CIDCAD/DISPLAY_COPY-STATUSEXTERN, sy-vline,
  WA_/CIDCAD/DISPLAY_COPY-STATUSINTERN, sy-vline,
  WA_/CIDCAD/DISPLAY_COPY-WSAPPLICATION, sy-vline,
  WA_/CIDCAD/DISPLAY_COPY-DOCPATH, sy-vline,
  WA_/CIDCAD/DISPLAY_COPY-DOCFILE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/CIDCAD/DISPLAY_COPY 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_/CIDCAD/DISPLAY_COPY 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_/CIDCAD/DISPLAY_COPY INTO WA_/CIDCAD/DISPLAY_COPY.


*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 ALPHA, internal->external for field DOCUMENTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/CIDCAD/DISPLAY_COPY-DOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CIDCAD/DISPLAY_COPY-DOCUMENTNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOKNR_NEW
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/CIDCAD/DISPLAY_COPY-DOKNR_NEW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CIDCAD/DISPLAY_COPY-DOKNR_NEW.
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_/CIDCAD/DISPLAY_COPY_STR, 
DOCUMENTTYPE TYPE STRING,
DOCUMENTNUMBER TYPE STRING,
DOCUMENTVERSION TYPE STRING,
DOCUMENTPART TYPE STRING,
DESCRIPTION TYPE STRING,
USERNAME TYPE STRING,
STATUSEXTERN TYPE STRING,
STATUSINTERN TYPE STRING,
WSAPPLICATION TYPE STRING,
DOCPATH TYPE STRING,
DOCFILE TYPE STRING,
USERDEFINED4 TYPE STRING,
CHECKEDIN TYPE STRING,
REL_TYPE TYPE STRING,
IS_SELECTED TYPE STRING,
CHECKED_IN_ICON TYPE STRING,
OBJ_TYPE_ICON TYPE STRING,
ACTUAL_ICON TYPE STRING,
REL_TYPE_ICON TYPE STRING,
ACTION_NR TYPE STRING,
ACTION_STATE TYPE STRING,
MESSAGE TYPE STRING,
EXECUTE_COPY TYPE STRING,
DOKNR_NEW TYPE STRING,
COPYLINKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/CIDCAD/DISPLAY_COPY_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_/CIDCAD/DISPLAY_COPY_STR-DOCUMENTTYPE sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-DOCUMENTNUMBER sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-DOCUMENTVERSION sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-DOCUMENTPART sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-DESCRIPTION sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-USERNAME sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-STATUSEXTERN sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-STATUSINTERN sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-WSAPPLICATION sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-DOCPATH sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-DOCFILE sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-USERDEFINED4 sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-CHECKEDIN sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-REL_TYPE sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-IS_SELECTED sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-CHECKED_IN_ICON sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-OBJ_TYPE_ICON sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-ACTUAL_ICON sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-REL_TYPE_ICON sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-ACTION_NR sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-ACTION_STATE sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-MESSAGE sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-EXECUTE_COPY sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-DOKNR_NEW sy-vline 
WA_/CIDCAD/DISPLAY_COPY_STR-COPYLINKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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