ABAP Select data from SAP table V_TVST_ROF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TVST_ROF
*  INTO TABLE @DATA(IT_V_TVST_ROF2).
*--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_V_TVST_ROF INDEX 1 INTO DATA(WA_V_TVST_ROF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TVST_ROF>-MANDT = 1.
<V_TVST_ROF>-VSTEL = 1.
<V_TVST_ROF>-VTEXT = 1.
<V_TVST_ROF>-FABKL = 1.
<V_TVST_ROF>-LTEXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TVST_ROF-LAZBS, sy-vline,
  WA_V_TVST_ROF-RIZBS, sy-vline,
  WA_V_TVST_ROF-VTRZT, sy-vline,
  WA_V_TVST_ROF-LAZZT, sy-vline,
  WA_V_TVST_ROF-RIZZT, sy-vline,
  WA_V_TVST_ROF-LOADTG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TVST_ROF 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_V_TVST_ROF 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_V_TVST_ROF INTO WA_V_TVST_ROF.


*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 TSTRG, internal->external for field LOADTG
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_V_TVST_ROF-LOADTG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVST_ROF-LOADTG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field LOADTN
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_V_TVST_ROF-LOADTN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVST_ROF-LOADTN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRG, internal->external for field PIPATG
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_V_TVST_ROF-PIPATG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVST_ROF-PIPATG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field PIPATN
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_V_TVST_ROF-PIPATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVST_ROF-PIPATN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRG, internal->external for field ROUNDG
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_V_TVST_ROF-ROUNDG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVST_ROF-ROUNDG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field ROUNDN
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_V_TVST_ROF-ROUNDN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVST_ROF-ROUNDN.
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_V_TVST_ROF_STR, 
MANDT TYPE STRING,
VSTEL TYPE STRING,
VTEXT TYPE STRING,
FABKL TYPE STRING,
LTEXT TYPE STRING,
LAZBS TYPE STRING,
RIZBS TYPE STRING,
VTRZT TYPE STRING,
LAZZT TYPE STRING,
RIZZT TYPE STRING,
LOADTG TYPE STRING,
LOADTN TYPE STRING,
PIPATG TYPE STRING,
PIPATN TYPE STRING,
TSTRID TYPE STRING,
ROUNDG TYPE STRING,
ROUNDN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TVST_ROF_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_V_TVST_ROF_STR-MANDT sy-vline 
WA_V_TVST_ROF_STR-VSTEL sy-vline 
WA_V_TVST_ROF_STR-VTEXT sy-vline 
WA_V_TVST_ROF_STR-FABKL sy-vline 
WA_V_TVST_ROF_STR-LTEXT sy-vline 
WA_V_TVST_ROF_STR-LAZBS sy-vline 
WA_V_TVST_ROF_STR-RIZBS sy-vline 
WA_V_TVST_ROF_STR-VTRZT sy-vline 
WA_V_TVST_ROF_STR-LAZZT sy-vline 
WA_V_TVST_ROF_STR-RIZZT sy-vline 
WA_V_TVST_ROF_STR-LOADTG sy-vline 
WA_V_TVST_ROF_STR-LOADTN sy-vline 
WA_V_TVST_ROF_STR-PIPATG sy-vline 
WA_V_TVST_ROF_STR-PIPATN sy-vline 
WA_V_TVST_ROF_STR-TSTRID sy-vline 
WA_V_TVST_ROF_STR-ROUNDG sy-vline 
WA_V_TVST_ROF_STR-ROUNDN sy-vline      INTO ld_text SEPARATED BY SPACE.

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