ABAP Select data from SAP table WS2_EXT_SDL_GET_SAP_SYSTEM_DET into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WS2_EXT_SDL_GET_SAP_SYSTEM_DET 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 WS2_EXT_SDL_GET_SAP_SYSTEM_DET. 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 WS2_EXT_SDL_GET_SAP_SYSTEM_DET 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_WS2_EXT_SDL_GET_SAP_SYSTEM_DET TYPE STANDARD TABLE OF WS2_EXT_SDL_GET_SAP_SYSTEM_DET,
      WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET TYPE WS2_EXT_SDL_GET_SAP_SYSTEM_DET,
      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: <WS2_EXT_SDL_GET_SAP_SYSTEM_DET> TYPE WS2_EXT_SDL_GET_SAP_SYSTEM_DET.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WS2_EXT_SDL_GET_SAP_SYSTEM_DET.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WS2_EXT_SDL_GET_SAP_SYSTEM_DET
  INTO TABLE IT_WS2_EXT_SDL_GET_SAP_SYSTEM_DET.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WS2_EXT_SDL_GET_SAP_SYSTEM_DET
*  INTO TABLE @DATA(IT_WS2_EXT_SDL_GET_SAP_SYSTEM_DET2).
*--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_WS2_EXT_SDL_GET_SAP_SYSTEM_DET INDEX 1 INTO DATA(WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WS2_EXT_SDL_GET_SAP_SYSTEM_DET ASSIGNING <WS2_EXT_SDL_GET_SAP_SYSTEM_DET>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WS2_EXT_SDL_GET_SAP_SYSTEM_DET>-CONTROLLER = 1.
<WS2_EXT_SDL_GET_SAP_SYSTEM_DET>-CONNECTIONS = 1.
<WS2_EXT_SDL_GET_SAP_SYSTEM_DET>-CONTROLLER = 1.
<WS2_EXT_SDL_GET_SAP_SYSTEM_DET>-ITEM = 1.
<WS2_EXT_SDL_GET_SAP_SYSTEM_DET>-PARAMETERS = 1.

ENDLOOP.

LOOP AT IT_WS2_EXT_SDL_GET_SAP_SYSTEM_DET INTO WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET-CONTROLLER, sy-vline,
  WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET-ITEM, sy-vline,
  WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET-RETURN, sy-vline,
  WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET-CONTROLLER, sy-vline,
  WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET-RC, sy-vline,
  WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET-TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET 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_WS2_EXT_SDL_GET_SAP_SYSTEM_DET 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_WS2_EXT_SDL_GET_SAP_SYSTEM_DET INTO WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET.


*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_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR, 
CONTROLLER TYPE STRING,
CONNECTIONS TYPE STRING,
CONTROLLER TYPE STRING,
ITEM TYPE STRING,
PARAMETERS TYPE STRING,
CONTROLLER TYPE STRING,
ITEM TYPE STRING,
RETURN TYPE STRING,
CONTROLLER TYPE STRING,
RC TYPE STRING,
TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_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_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-CONTROLLER sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-CONNECTIONS sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-CONTROLLER sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-ITEM sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-PARAMETERS sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-CONTROLLER sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-ITEM sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-RETURN sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-CONTROLLER sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-RC sy-vline 
WA_WS2_EXT_SDL_GET_SAP_SYSTEM_DET_STR-TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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