ABAP Select data from SAP table T100VT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP T100VT 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 T100VT. 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 T100VT 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_T100VT TYPE STANDARD TABLE OF T100VT,
      WA_T100VT TYPE T100VT,
      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: <T100VT> TYPE T100VT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T100VT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T100VT
  INTO TABLE IT_T100VT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T100VT
*  INTO TABLE @DATA(IT_T100VT2).
*--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_T100VT INDEX 1 INTO DATA(WA_T100VT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T100VT ASSIGNING <T100VT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T100VT>-ARBGB = 1.
<T100VT>-MASTERLANG = 1.
<T100VT>-APPLCLASS = 1.
<T100VT>-RESPUSER = 1.
<T100VT>-LASTUSER = 1.

ENDLOOP.

LOOP AT IT_T100VT INTO WA_T100VT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T100VT-LDATE, sy-vline,
  WA_T100VT-LTIME, sy-vline,
  WA_T100VT-STEXT, sy-vline,
  WA_T100VT-MSGNR, sy-vline,
  WA_T100VT-TABNAME, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_T100VT 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_T100VT 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_T100VT INTO WA_T100VT.


*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 MASTERLANG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_T100VT-MASTERLANG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_T100VT-MASTERLANG.
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_T100VT_STR, 
ARBGB TYPE STRING,
MASTERLANG TYPE STRING,
APPLCLASS TYPE STRING,
RESPUSER TYPE STRING,
LASTUSER TYPE STRING,
LDATE TYPE STRING,
LTIME TYPE STRING,
STEXT TYPE STRING,
MSGNR TYPE STRING,
TABNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T100VT_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_T100VT_STR-ARBGB sy-vline 
WA_T100VT_STR-MASTERLANG sy-vline 
WA_T100VT_STR-APPLCLASS sy-vline 
WA_T100VT_STR-RESPUSER sy-vline 
WA_T100VT_STR-LASTUSER sy-vline 
WA_T100VT_STR-LDATE sy-vline 
WA_T100VT_STR-LTIME sy-vline 
WA_T100VT_STR-STEXT sy-vline 
WA_T100VT_STR-MSGNR sy-vline 
WA_T100VT_STR-TABNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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