ABAP Select data from SAP table DDRTOBJFIELDSDIFF into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DDRTOBJFIELDSDIFF 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 DDRTOBJFIELDSDIFF. 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 DDRTOBJFIELDSDIFF 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_DDRTOBJFIELDSDIFF TYPE STANDARD TABLE OF DDRTOBJFIELDSDIFF,
      WA_DDRTOBJFIELDSDIFF TYPE DDRTOBJFIELDSDIFF,
      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: <DDRTOBJFIELDSDIFF> TYPE DDRTOBJFIELDSDIFF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DDRTOBJFIELDSDIFF
*  INTO TABLE @DATA(IT_DDRTOBJFIELDSDIFF2).
*--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_DDRTOBJFIELDSDIFF INDEX 1 INTO DATA(WA_DDRTOBJFIELDSDIFF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DDRTOBJFIELDSDIFF>-SOURCE = 1.
<DDRTOBJFIELDSDIFF>-DIAGNOSIS = 1.
<DDRTOBJFIELDSDIFF>-FIELDNAME = 1.
<DDRTOBJFIELDSDIFF>-POSITION = 1.
<DDRTOBJFIELDSDIFF>-DBTABPOS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DDRTOBJFIELDSDIFF-DEPTH, sy-vline,
  WA_DDRTOBJFIELDSDIFF-DTYP, sy-vline,
  WA_DDRTOBJFIELDSDIFF-DBLENGTH, sy-vline,
  WA_DDRTOBJFIELDSDIFF-DBLENGTH2, sy-vline,
  WA_DDRTOBJFIELDSDIFF-DECIMALS, sy-vline,
  WA_DDRTOBJFIELDSDIFF-OFFSET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DDRTOBJFIELDSDIFF 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_DDRTOBJFIELDSDIFF 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_DDRTOBJFIELDSDIFF INTO WA_DDRTOBJFIELDSDIFF.


*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 DTYPE, internal->external for field DTYP
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_DDRTOBJFIELDSDIFF-DTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DDRTOBJFIELDSDIFF-DTYP.
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_DDRTOBJFIELDSDIFF_STR, 
SOURCE TYPE STRING,
DIAGNOSIS TYPE STRING,
FIELDNAME TYPE STRING,
POSITION TYPE STRING,
DBTABPOS TYPE STRING,
DEPTH TYPE STRING,
DTYP TYPE STRING,
DBLENGTH TYPE STRING,
DBLENGTH2 TYPE STRING,
DECIMALS TYPE STRING,
OFFSET TYPE STRING,
EXLENGTH TYPE STRING,
FIELDTYPE TYPE STRING,
ABTYPE TYPE STRING,
EXID TYPE STRING,
DIGITS TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
ROLLNAME TYPE STRING,
PRECFIELD TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
CONVEXIT TYPE STRING,
MEMORYID TYPE STRING,
CHECKTABLE TYPE STRING,
COLINFO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DDRTOBJFIELDSDIFF_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_DDRTOBJFIELDSDIFF_STR-SOURCE sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-DIAGNOSIS sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-FIELDNAME sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-POSITION sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-DBTABPOS sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-DEPTH sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-DTYP sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-DBLENGTH sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-DBLENGTH2 sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-DECIMALS sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-OFFSET sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-EXLENGTH sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-FIELDTYPE sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-ABTYPE sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-EXID sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-DIGITS sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-FLAG1 sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-FLAG2 sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-FLAG3 sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-FLAG4 sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-ROLLNAME sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-PRECFIELD sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-REFTABLE sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-REFFIELD sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-CONVEXIT sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-MEMORYID sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-CHECKTABLE sy-vline 
WA_DDRTOBJFIELDSDIFF_STR-COLINFO sy-vline      INTO ld_text SEPARATED BY SPACE.

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