ABAP Select data from SAP table /IWWRK/S_TGW_USER_DET_EXPAND into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /IWWRK/S_TGW_USER_DET_EXPAND 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 /IWWRK/S_TGW_USER_DET_EXPAND. 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 /IWWRK/S_TGW_USER_DET_EXPAND 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_/IWWRK/S_TGW_USER_DET_EXPAND TYPE STANDARD TABLE OF /IWWRK/S_TGW_USER_DET_EXPAND,
      WA_/IWWRK/S_TGW_USER_DET_EXPAND TYPE /IWWRK/S_TGW_USER_DET_EXPAND,
      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: </IWWRK/S_TGW_USER_DET_EXPAND> TYPE /IWWRK/S_TGW_USER_DET_EXPAND.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /IWWRK/S_TGW_USER_DET_EXPAND
  INTO TABLE IT_/IWWRK/S_TGW_USER_DET_EXPAND.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /IWWRK/S_TGW_USER_DET_EXPAND
*  INTO TABLE @DATA(IT_/IWWRK/S_TGW_USER_DET_EXPAND2).
*--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_/IWWRK/S_TGW_USER_DET_EXPAND INDEX 1 INTO DATA(WA_/IWWRK/S_TGW_USER_DET_EXPAND2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/IWWRK/S_TGW_USER_DET_EXPAND ASSIGNING </IWWRK/S_TGW_USER_DET_EXPAND>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</IWWRK/S_TGW_USER_DET_EXPAND>-UNIQUE_NAME = 1.
</IWWRK/S_TGW_USER_DET_EXPAND>-DISPLAY_NAME = 1.
</IWWRK/S_TGW_USER_DET_EXPAND>-FIRST_NAME = 1.
</IWWRK/S_TGW_USER_DET_EXPAND>-LAST_NAME = 1.
</IWWRK/S_TGW_USER_DET_EXPAND>-COMPANY = 1.

ENDLOOP.

LOOP AT IT_/IWWRK/S_TGW_USER_DET_EXPAND INTO WA_/IWWRK/S_TGW_USER_DET_EXPAND.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/IWWRK/S_TGW_USER_DET_EXPAND-DEPARTMENT, sy-vline,
  WA_/IWWRK/S_TGW_USER_DET_EXPAND-EMAIL, sy-vline,
  WA_/IWWRK/S_TGW_USER_DET_EXPAND-ADDRESS, sy-vline,
  WA_/IWWRK/S_TGW_USER_DET_EXPAND-STREET, sy-vline,
  WA_/IWWRK/S_TGW_USER_DET_EXPAND-STREET_NUMBER, sy-vline,
  WA_/IWWRK/S_TGW_USER_DET_EXPAND-CITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/IWWRK/S_TGW_USER_DET_EXPAND 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_/IWWRK/S_TGW_USER_DET_EXPAND 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_/IWWRK/S_TGW_USER_DET_EXPAND INTO WA_/IWWRK/S_TGW_USER_DET_EXPAND.


*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_/IWWRK/S_TGW_USER_DET_EXPAND_STR, 
UNIQUE_NAME TYPE STRING,
DISPLAY_NAME TYPE STRING,
FIRST_NAME TYPE STRING,
LAST_NAME TYPE STRING,
COMPANY TYPE STRING,
DEPARTMENT TYPE STRING,
EMAIL TYPE STRING,
ADDRESS TYPE STRING,
STREET TYPE STRING,
STREET_NUMBER TYPE STRING,
CITY TYPE STRING,
POSTAL_CODE TYPE STRING,
STATE TYPE STRING,
COUNTRY TYPE STRING,
WORK_PHONE TYPE STRING,
MOBILE_PHONE TYPE STRING,
HOME_PHONE TYPE STRING,
MIME_TYPE TYPE STRING,
SUBSTITUTED_USERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/IWWRK/S_TGW_USER_DET_EXPAND_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_/IWWRK/S_TGW_USER_DET_EXPAND_STR-UNIQUE_NAME sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-DISPLAY_NAME sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-FIRST_NAME sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-LAST_NAME sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-COMPANY sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-DEPARTMENT sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-EMAIL sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-ADDRESS sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-STREET sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-STREET_NUMBER sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-CITY sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-POSTAL_CODE sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-STATE sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-COUNTRY sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-WORK_PHONE sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-MOBILE_PHONE sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-HOME_PHONE sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-MIME_TYPE sy-vline 
WA_/IWWRK/S_TGW_USER_DET_EXPAND_STR-SUBSTITUTED_USERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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