ABAP Select data from SAP table DDRTOBJINTERNALTABLE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DDRTOBJINTERNALTABLE
*  INTO TABLE @DATA(IT_DDRTOBJINTERNALTABLE2).
*--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_DDRTOBJINTERNALTABLE INDEX 1 INTO DATA(WA_DDRTOBJINTERNALTABLE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DDRTOBJINTERNALTABLE>-INDEX_ACCESS = 1.
<DDRTOBJINTERNALTABLE>-INITIAL_SIZE = 1.
<DDRTOBJINTERNALTABLE>-FURTHER_2ND_KEYS = 1.
<DDRTOBJINTERNALTABLE>-TYPE_GROUP = 1.
<DDRTOBJINTERNALTABLE>-TYPE_NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DDRTOBJINTERNALTABLE-ROW_TYPE_STRUCTURED_LENGTH_DB, sy-vline,
  WA_DDRTOBJINTERNALTABLE-ROW_TYPE_DDIC_TYPE_KIND, sy-vline,
  WA_DDRTOBJINTERNALTABLE-ROW_TYPE_LENGTH_DB, sy-vline,
  WA_DDRTOBJINTERNALTABLE-KEY_NAME, sy-vline,
  WA_DDRTOBJINTERNALTABLE-IS_KEY_UNIQUE, sy-vline,
  WA_DDRTOBJINTERNALTABLE-IS_PRIMARY_KEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DDRTOBJINTERNALTABLE 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_DDRTOBJINTERNALTABLE 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_DDRTOBJINTERNALTABLE INTO WA_DDRTOBJINTERNALTABLE.


*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_DDRTOBJINTERNALTABLE_STR, 
INDEX_ACCESS TYPE STRING,
INITIAL_SIZE TYPE STRING,
FURTHER_2ND_KEYS TYPE STRING,
TYPE_GROUP TYPE STRING,
TYPE_NAME TYPE STRING,
ROW_TYPE_STRUCTURED_LENGTH_DB TYPE STRING,
ROW_TYPE_DDIC_TYPE_KIND TYPE STRING,
ROW_TYPE_LENGTH_DB TYPE STRING,
KEY_NAME TYPE STRING,
IS_KEY_UNIQUE TYPE STRING,
IS_PRIMARY_KEY TYPE STRING,
IS_REDUNDANT TYPE STRING,
KEY_KIND TYPE STRING,
COMPONENT_KIND TYPE STRING,
NAME TYPE STRING,
COMPONENT_POSITION TYPE STRING,
DDIC_TYPE_KIND TYPE STRING,
DDIC_TYPE_NAME TYPE STRING,
LENGTH_DB TYPE STRING,
OFFSET TYPE STRING,
DECIMALS TYPE STRING,
BOX_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DDRTOBJINTERNALTABLE_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_DDRTOBJINTERNALTABLE_STR-INDEX_ACCESS sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-INITIAL_SIZE sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-FURTHER_2ND_KEYS sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-TYPE_GROUP sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-TYPE_NAME sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-ROW_TYPE_STRUCTURED_LENGTH_DB sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-ROW_TYPE_DDIC_TYPE_KIND sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-ROW_TYPE_LENGTH_DB sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-KEY_NAME sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-IS_KEY_UNIQUE sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-IS_PRIMARY_KEY sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-IS_REDUNDANT sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-KEY_KIND sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-COMPONENT_KIND sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-NAME sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-COMPONENT_POSITION sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-DDIC_TYPE_KIND sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-DDIC_TYPE_NAME sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-LENGTH_DB sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-OFFSET sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-DECIMALS sy-vline 
WA_DDRTOBJINTERNALTABLE_STR-BOX_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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