ABAP Select data from SAP table IWR3LRES into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IWR3LRES 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 IWR3LRES. 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 IWR3LRES 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_IWR3LRES TYPE STANDARD TABLE OF IWR3LRES,
      WA_IWR3LRES TYPE IWR3LRES,
      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: <IWR3LRES> TYPE IWR3LRES.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IWR3LRES.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IWR3LRES
  INTO TABLE IT_IWR3LRES.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWR3LRES
*  INTO TABLE @DATA(IT_IWR3LRES2).
*--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_IWR3LRES INDEX 1 INTO DATA(WA_IWR3LRES2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IWR3LRES ASSIGNING <IWR3LRES>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWR3LRES>-ID_RESULT = 1.
<IWR3LRES>-COUNT_LINK = 1.
<IWR3LRES>-TYPE_RES = 1.
<IWR3LRES>-STRUCCLASS = 1.
<IWR3LRES>-STRUCOBJID = 1.

ENDLOOP.

LOOP AT IT_IWR3LRES INTO WA_IWR3LRES.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWR3LRES-TOPICCLASS, sy-vline,
  WA_IWR3LRES-TOPICOBJID, sy-vline,
  WA_IWR3LRES-TITLE, sy-vline,
  WA_IWR3LRES-TECHNAME, sy-vline,
  WA_IWR3LRES-CREATED_BY, sy-vline,
  WA_IWR3LRES-CREATED_AT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWR3LRES 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_IWR3LRES 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_IWR3LRES INTO WA_IWR3LRES.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IWR3LRES-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWR3LRES-LANGU.
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_IWR3LRES_STR, 
ID_RESULT TYPE STRING,
COUNT_LINK TYPE STRING,
TYPE_RES TYPE STRING,
STRUCCLASS TYPE STRING,
STRUCOBJID TYPE STRING,
TOPICCLASS TYPE STRING,
TOPICOBJID TYPE STRING,
TITLE TYPE STRING,
TECHNAME TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_AT TYPE STRING,
F_ID TYPE STRING,
F_TITLE TYPE STRING,
F_TECHNAME TYPE STRING,
DELIVER TYPE STRING,
F_RESPNSB TYPE STRING,
ID TYPE STRING,
DEVCLASS TYPE STRING,
TCODE TYPE STRING,
PROGRAMM TYPE STRING,
DYNPRONR TYPE STRING,
SPEC_PRG TYPE STRING,
SPEC_TEXT TYPE STRING,
ENTRY_BY TYPE STRING,
ENTRY_DAT TYPE STRING,
INDUSTRY TYPE STRING,
INDUSTRYRL TYPE STRING,
COUNTRY TYPE STRING,
NO_LINK TYPE STRING,
SPEC_DYNP TYPE STRING,
EXPORTKEY TYPE STRING,
RESPONSIBL TYPE STRING,
STRUC_NEW TYPE STRING,
FLAG TYPE STRING,
LANGU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWR3LRES_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_IWR3LRES_STR-ID_RESULT sy-vline 
WA_IWR3LRES_STR-COUNT_LINK sy-vline 
WA_IWR3LRES_STR-TYPE_RES sy-vline 
WA_IWR3LRES_STR-STRUCCLASS sy-vline 
WA_IWR3LRES_STR-STRUCOBJID sy-vline 
WA_IWR3LRES_STR-TOPICCLASS sy-vline 
WA_IWR3LRES_STR-TOPICOBJID sy-vline 
WA_IWR3LRES_STR-TITLE sy-vline 
WA_IWR3LRES_STR-TECHNAME sy-vline 
WA_IWR3LRES_STR-CREATED_BY sy-vline 
WA_IWR3LRES_STR-CREATED_AT sy-vline 
WA_IWR3LRES_STR-F_ID sy-vline 
WA_IWR3LRES_STR-F_TITLE sy-vline 
WA_IWR3LRES_STR-F_TECHNAME sy-vline 
WA_IWR3LRES_STR-DELIVER sy-vline 
WA_IWR3LRES_STR-F_RESPNSB sy-vline 
WA_IWR3LRES_STR-ID sy-vline 
WA_IWR3LRES_STR-DEVCLASS sy-vline 
WA_IWR3LRES_STR-TCODE sy-vline 
WA_IWR3LRES_STR-PROGRAMM sy-vline 
WA_IWR3LRES_STR-DYNPRONR sy-vline 
WA_IWR3LRES_STR-SPEC_PRG sy-vline 
WA_IWR3LRES_STR-SPEC_TEXT sy-vline 
WA_IWR3LRES_STR-ENTRY_BY sy-vline 
WA_IWR3LRES_STR-ENTRY_DAT sy-vline 
WA_IWR3LRES_STR-INDUSTRY sy-vline 
WA_IWR3LRES_STR-INDUSTRYRL sy-vline 
WA_IWR3LRES_STR-COUNTRY sy-vline 
WA_IWR3LRES_STR-NO_LINK sy-vline 
WA_IWR3LRES_STR-SPEC_DYNP sy-vline 
WA_IWR3LRES_STR-EXPORTKEY sy-vline 
WA_IWR3LRES_STR-RESPONSIBL sy-vline 
WA_IWR3LRES_STR-STRUC_NEW sy-vline 
WA_IWR3LRES_STR-FLAG sy-vline 
WA_IWR3LRES_STR-LANGU sy-vline      INTO ld_text SEPARATED BY SPACE.

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