ABAP Select data from SAP table DISPCASELINKDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DISPCASELINKDR
*  INTO TABLE @DATA(IT_DISPCASELINKDR2).
*--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_DISPCASELINKDR INDEX 1 INTO DATA(WA_DISPCASELINKDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DISPCASELINKDR>-MANDT = 1.
<DISPCASELINKDR>-DRAFTUUID = 1.
<DISPCASELINKDR>-PARENTDRAFTUUID = 1.
<DISPCASELINKDR>-LOGICALSYSTEM = 1.
<DISPCASELINKDR>-OBJECTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DISPCASELINKDR-OBJECTKEY, sy-vline,
  WA_DISPCASELINKDR-RELATIONTOLINKEDOBJECT, sy-vline,
  WA_DISPCASELINKDR-DISPUTECASEUUID, sy-vline,
  WA_DISPCASELINKDR-OBJECTCLASSIFICATION, sy-vline,
  WA_DISPCASELINKDR-OBJECTISCONFIRMED, sy-vline,
  WA_DISPCASELINKDR-OBJECTISVOIDED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DISPCASELINKDR 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_DISPCASELINKDR 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_DISPCASELINKDR INTO WA_DISPCASELINKDR.


*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 LOGICALSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DISPCASELINKDR-LOGICALSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DISPCASELINKDR-LOGICALSYSTEM.
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_DISPCASELINKDR_STR, 
MANDT TYPE STRING,
DRAFTUUID TYPE STRING,
PARENTDRAFTUUID TYPE STRING,
LOGICALSYSTEM TYPE STRING,
OBJECTTYPE TYPE STRING,
OBJECTKEY TYPE STRING,
RELATIONTOLINKEDOBJECT TYPE STRING,
DISPUTECASEUUID TYPE STRING,
OBJECTCLASSIFICATION TYPE STRING,
OBJECTISCONFIRMED TYPE STRING,
OBJECTISVOIDED TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DISPCASELINKDR_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_DISPCASELINKDR_STR-MANDT sy-vline 
WA_DISPCASELINKDR_STR-DRAFTUUID sy-vline 
WA_DISPCASELINKDR_STR-PARENTDRAFTUUID sy-vline 
WA_DISPCASELINKDR_STR-LOGICALSYSTEM sy-vline 
WA_DISPCASELINKDR_STR-OBJECTTYPE sy-vline 
WA_DISPCASELINKDR_STR-OBJECTKEY sy-vline 
WA_DISPCASELINKDR_STR-RELATIONTOLINKEDOBJECT sy-vline 
WA_DISPCASELINKDR_STR-DISPUTECASEUUID sy-vline 
WA_DISPCASELINKDR_STR-OBJECTCLASSIFICATION sy-vline 
WA_DISPCASELINKDR_STR-OBJECTISCONFIRMED sy-vline 
WA_DISPCASELINKDR_STR-OBJECTISVOIDED sy-vline 
WA_DISPCASELINKDR_STR-HASACTIVEENTITY sy-vline 
WA_DISPCASELINKDR_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_DISPCASELINKDR_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_DISPCASELINKDR_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_DISPCASELINKDR_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_DISPCASELINKDR_STR-DRAFTENTITYOPERATIONCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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