ABAP Select data from SAP table TGSUV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TGSUV
*  INTO TABLE @DATA(IT_TGSUV2).
*--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_TGSUV INDEX 1 INTO DATA(WA_TGSUV2).


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

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

ENDLOOP.

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

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


*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_TGSUV_STR, 
MANDT TYPE STRING,
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_TGSUV_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_TGSUV_STR-MANDT sy-vline 
WA_TGSUV_STR-UNAME sy-vline 
WA_TGSUV_STR-NEWVIEW sy-vline 
WA_TGSUV_STR-DEPTH sy-vline 
WA_TGSUV_STR-DISPLAY sy-vline 
WA_TGSUV_STR-KNOCKON sy-vline 
WA_TGSUV_STR-REPRESENT sy-vline 
WA_TGSUV_STR-PROFILE sy-vline 
WA_TGSUV_STR-DIRECTION sy-vline 
WA_TGSUV_STR-ROTATION sy-vline 
WA_TGSUV_STR-GRID sy-vline 
WA_TGSUV_STR-ALIGNMENT sy-vline 
WA_TGSUV_STR-OFONT sy-vline 
WA_TGSUV_STR-OUTERSCALX sy-vline 
WA_TGSUV_STR-OUTERSCALY sy-vline 
WA_TGSUV_STR-INNERSCALX sy-vline 
WA_TGSUV_STR-INNERSCALY sy-vline 
WA_TGSUV_STR-SHADOW sy-vline 
WA_TGSUV_STR-SOLID sy-vline 
WA_TGSUV_STR-LINEWRAP sy-vline 
WA_TGSUV_STR-LINKLOOK sy-vline 
WA_TGSUV_STR-LFONT sy-vline 
WA_TGSUV_STR-LBUTTON sy-vline 
WA_TGSUV_STR-LTEXT sy-vline 
WA_TGSUV_STR-ARROWS sy-vline 
WA_TGSUV_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.