ABAP Select data from SAP table TGSUO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TGSUO
*  INTO TABLE @DATA(IT_TGSUO2).
*--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_TGSUO INDEX 1 INTO DATA(WA_TGSUO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TGSUO>-UNAME = 1.
<TGSUO>-NEWVIEW = 1.
<TGSUO>-DEPTH = 1.
<TGSUO>-DISPLAY = 1.
<TGSUO>-KNOCKON = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TGSUO-REPRESENT, sy-vline,
  WA_TGSUO-PROFILE, sy-vline,
  WA_TGSUO-DIRECTION, sy-vline,
  WA_TGSUO-ROTATION, sy-vline,
  WA_TGSUO-GRID, sy-vline,
  WA_TGSUO-ALIGNMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TGSUO 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_TGSUO 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_TGSUO INTO WA_TGSUO.


*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_TGSUO_STR, 
UNAME TYPE STRING,
NEWVIEW TYPE STRING,
DEPTH TYPE STRING,
DISPLAY TYPE STRING,
KNOCKON TYPE STRING,
REPRESENT TYPE STRING,
PROFILE TYPE STRING,
DIRECTION TYPE STRING,
ROTATION TYPE STRING,
GRID TYPE STRING,
ALIGNMENT TYPE STRING,
OFONT TYPE STRING,
OUTERSCALX TYPE STRING,
OUTERSCALY TYPE STRING,
INNERSCALX TYPE STRING,
INNERSCALY TYPE STRING,
SHADOW TYPE STRING,
SOLID TYPE STRING,
LINEWRAP TYPE STRING,
LINKLOOK TYPE STRING,
LFONT TYPE STRING,
LBUTTON TYPE STRING,
LTEXT TYPE STRING,
ARROWS TYPE STRING,
GROUPTEXTS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TGSUO_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_TGSUO_STR-UNAME sy-vline 
WA_TGSUO_STR-NEWVIEW sy-vline 
WA_TGSUO_STR-DEPTH sy-vline 
WA_TGSUO_STR-DISPLAY sy-vline 
WA_TGSUO_STR-KNOCKON sy-vline 
WA_TGSUO_STR-REPRESENT sy-vline 
WA_TGSUO_STR-PROFILE sy-vline 
WA_TGSUO_STR-DIRECTION sy-vline 
WA_TGSUO_STR-ROTATION sy-vline 
WA_TGSUO_STR-GRID sy-vline 
WA_TGSUO_STR-ALIGNMENT sy-vline 
WA_TGSUO_STR-OFONT sy-vline 
WA_TGSUO_STR-OUTERSCALX sy-vline 
WA_TGSUO_STR-OUTERSCALY sy-vline 
WA_TGSUO_STR-INNERSCALX sy-vline 
WA_TGSUO_STR-INNERSCALY sy-vline 
WA_TGSUO_STR-SHADOW sy-vline 
WA_TGSUO_STR-SOLID sy-vline 
WA_TGSUO_STR-LINEWRAP sy-vline 
WA_TGSUO_STR-LINKLOOK sy-vline 
WA_TGSUO_STR-LFONT sy-vline 
WA_TGSUO_STR-LBUTTON sy-vline 
WA_TGSUO_STR-LTEXT sy-vline 
WA_TGSUO_STR-ARROWS sy-vline 
WA_TGSUO_STR-GROUPTEXTS sy-vline      INTO ld_text SEPARATED BY SPACE.

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