ABAP Select data from SAP table IWP_S_IOBJ_INTERFACE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWP_S_IOBJ_INTERFACE
*  INTO TABLE @DATA(IT_IWP_S_IOBJ_INTERFACE2).
*--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_IWP_S_IOBJ_INTERFACE INDEX 1 INTO DATA(WA_IWP_S_IOBJ_INTERFACE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWP_S_IOBJ_INTERFACE>-INFOOBJECT = 1.
<IWP_S_IOBJ_INTERFACE>-TYPE = 1.
<IWP_S_IOBJ_INTERFACE>-ROLLNAME = 1.
<IWP_S_IOBJ_INTERFACE>-DOMNAME = 1.
<IWP_S_IOBJ_INTERFACE>-REFTABLE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWP_S_IOBJ_INTERFACE-REFFIELD, sy-vline,
  WA_IWP_S_IOBJ_INTERFACE-SIMPLE, sy-vline,
  WA_IWP_S_IOBJ_INTERFACE-DEF_TABLES, sy-vline,
  WA_IWP_S_IOBJ_INTERFACE-TEXT_TABLE, sy-vline,
  WA_IWP_S_IOBJ_INTERFACE-DOM_VALUES, sy-vline,
  WA_IWP_S_IOBJ_INTERFACE-COPY_NUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWP_S_IOBJ_INTERFACE 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_IWP_S_IOBJ_INTERFACE 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_IWP_S_IOBJ_INTERFACE INTO WA_IWP_S_IOBJ_INTERFACE.


*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 DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_IWP_S_IOBJ_INTERFACE-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWP_S_IOBJ_INTERFACE-DATATYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATP
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_IWP_S_IOBJ_INTERFACE-DATATP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWP_S_IOBJ_INTERFACE-DATATP.
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_IWP_S_IOBJ_INTERFACE_STR, 
INFOOBJECT TYPE STRING,
TYPE TYPE STRING,
ROLLNAME TYPE STRING,
DOMNAME TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
SIMPLE TYPE STRING,
DEF_TABLES TYPE STRING,
TEXT_TABLE TYPE STRING,
DOM_VALUES TYPE STRING,
COPY_NUMBER TYPE STRING,
ASSIGNMENTS TYPE STRING,
COMPOUNDS TYPE STRING,
ATTRIBUTES TYPE STRING,
DATATYPE TYPE STRING,
INTLEN TYPE STRING,
TIMDEPFL TYPE STRING,
TEXTSHORT TYPE STRING,
TEXTLONG TYPE STRING,
TXTTABFL TYPE STRING,
TXTSHFL TYPE STRING,
TXTMDFL TYPE STRING,
TXTLGFL TYPE STRING,
TXTTIMFL TYPE STRING,
KYFTP TYPE STRING,
UNITP TYPE STRING,
UNINM TYPE STRING,
DATATP TYPE STRING,
CHABASNM TYPE STRING,
CHASEL TYPE STRING,
F4QUERYEXEC TYPE STRING,
LOWERCASE TYPE STRING,
STATUS TYPE STRING,
REPLACED TYPE STRING,
AUTHRELFL TYPE STRING,
AUTHFIELD TYPE STRING,
FIELDNAME_LANGU TYPE STRING,
NOLANGU TYPE STRING,
HIETABFL TYPE STRING,
HIEVERFL TYPE STRING,
HIENMTFL TYPE STRING,
HIENDTFL TYPE STRING,
HIEINTFL TYPE STRING,
STR_NODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWP_S_IOBJ_INTERFACE_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_IWP_S_IOBJ_INTERFACE_STR-INFOOBJECT sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TYPE sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-ROLLNAME sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-DOMNAME sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-REFTABLE sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-REFFIELD sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-SIMPLE sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-DEF_TABLES sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TEXT_TABLE sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-DOM_VALUES sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-COPY_NUMBER sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-ASSIGNMENTS sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-COMPOUNDS sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-ATTRIBUTES sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-DATATYPE sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-INTLEN sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TIMDEPFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TEXTSHORT sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TEXTLONG sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TXTTABFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TXTSHFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TXTMDFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TXTLGFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-TXTTIMFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-KYFTP sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-UNITP sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-UNINM sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-DATATP sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-CHABASNM sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-CHASEL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-F4QUERYEXEC sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-LOWERCASE sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-STATUS sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-REPLACED sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-AUTHRELFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-AUTHFIELD sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-FIELDNAME_LANGU sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-NOLANGU sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-HIETABFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-HIEVERFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-HIENMTFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-HIENDTFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-HIEINTFL sy-vline 
WA_IWP_S_IOBJ_INTERFACE_STR-STR_NODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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