ABAP Select data from SAP table IWKXFOBJ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWKXFOBJ
*  INTO TABLE @DATA(IT_IWKXFOBJ2).
*--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_IWKXFOBJ INDEX 1 INTO DATA(WA_IWKXFOBJ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWKXFOBJ>-IONO = 1.
<IWKXFOBJ>-LOIO_CLASS = 1.
<IWKXFOBJ>-PHIO_CLASS = 1.
<IWKXFOBJ>-LOIO_ID = 1.
<IWKXFOBJ>-PHIO_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWKXFOBJ-NODE_LEVEL, sy-vline,
  WA_IWKXFOBJ-DIRECTORY, sy-vline,
  WA_IWKXFOBJ-FILE_COUNT, sy-vline,
  WA_IWKXFOBJ-FILE_NAME, sy-vline,
  WA_IWKXFOBJ-COMPFILE, sy-vline,
  WA_IWKXFOBJ-PROPERTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWKXFOBJ 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_IWKXFOBJ 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_IWKXFOBJ INTO WA_IWKXFOBJ.


*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_IWKXFOBJ_STR, 
IONO TYPE STRING,
LOIO_CLASS TYPE STRING,
PHIO_CLASS TYPE STRING,
LOIO_ID TYPE STRING,
PHIO_ID TYPE STRING,
NODE_LEVEL TYPE STRING,
DIRECTORY TYPE STRING,
FILE_COUNT TYPE STRING,
FILE_NAME TYPE STRING,
COMPFILE TYPE STRING,
PROPERTY TYPE STRING,
STATE TYPE STRING,
MASTERNR TYPE STRING,
SEQNR1 TYPE STRING,
SEQNR2 TYPE STRING,
PROCESS TYPE STRING,
ADDSECTION TYPE STRING,
PRPSECTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWKXFOBJ_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_IWKXFOBJ_STR-IONO sy-vline 
WA_IWKXFOBJ_STR-LOIO_CLASS sy-vline 
WA_IWKXFOBJ_STR-PHIO_CLASS sy-vline 
WA_IWKXFOBJ_STR-LOIO_ID sy-vline 
WA_IWKXFOBJ_STR-PHIO_ID sy-vline 
WA_IWKXFOBJ_STR-NODE_LEVEL sy-vline 
WA_IWKXFOBJ_STR-DIRECTORY sy-vline 
WA_IWKXFOBJ_STR-FILE_COUNT sy-vline 
WA_IWKXFOBJ_STR-FILE_NAME sy-vline 
WA_IWKXFOBJ_STR-COMPFILE sy-vline 
WA_IWKXFOBJ_STR-PROPERTY sy-vline 
WA_IWKXFOBJ_STR-STATE sy-vline 
WA_IWKXFOBJ_STR-MASTERNR sy-vline 
WA_IWKXFOBJ_STR-SEQNR1 sy-vline 
WA_IWKXFOBJ_STR-SEQNR2 sy-vline 
WA_IWKXFOBJ_STR-PROCESS sy-vline 
WA_IWKXFOBJ_STR-ADDSECTION sy-vline 
WA_IWKXFOBJ_STR-PRPSECTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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