ABAP Select data from SAP table VTVRTMSEG into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VTVRTMSEG 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 VTVRTMSEG. 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 VTVRTMSEG 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_VTVRTMSEG TYPE STANDARD TABLE OF VTVRTMSEG,
      WA_VTVRTMSEG TYPE VTVRTMSEG,
      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: <VTVRTMSEG> TYPE VTVRTMSEG.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VTVRTMSEG
*  INTO TABLE @DATA(IT_VTVRTMSEG2).
*--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_VTVRTMSEG INDEX 1 INTO DATA(WA_VTVRTMSEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VTVRTMSEG>-KURSTG = 1.
<VTVRTMSEG>-KURSTB = 1.
<VTVRTMSEG>-BCURVE = 1.
<VTVRTMSEG>-BCURVEB = 1.
<VTVRTMSEG>-WPKURSART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VTVRTMSEG-IDXART, sy-vline,
  WA_VTVRTMSEG-DVOLARTG, sy-vline,
  WA_VTVRTMSEG-DVOLARTB, sy-vline,
  WA_VTVRTMSEG-ZVOLARTG, sy-vline,
  WA_VTVRTMSEG-ZVOLARTB, sy-vline,
  WA_VTVRTMSEG-WVOLARTG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VTVRTMSEG 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_VTVRTMSEG 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_VTVRTMSEG INTO WA_VTVRTMSEG.


*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_VTVRTMSEG_STR, 
KURSTG TYPE STRING,
KURSTB TYPE STRING,
BCURVE TYPE STRING,
BCURVEB TYPE STRING,
WPKURSART TYPE STRING,
IDXART TYPE STRING,
DVOLARTG TYPE STRING,
DVOLARTB TYPE STRING,
ZVOLARTG TYPE STRING,
ZVOLARTB TYPE STRING,
WVOLARTG TYPE STRING,
WVOLARTB TYPE STRING,
IXVOLARTG TYPE STRING,
IXVOLARTB TYPE STRING,
VNAME TYPE STRING,
CALCVERF TYPE STRING,
WPPVART TYPE STRING,
WKTAGE TYPE STRING,
SVOLART TYPE STRING,
XHOR_CASHF TYPE STRING,
XEXTBW TYPE STRING,
XDEST_T1 TYPE STRING,
XFUNC_T1 TYPE STRING,
XDEST_T2 TYPE STRING,
XFUNC_T2 TYPE STRING,
IDX TYPE STRING,
BFART TYPE STRING,
XSTDINDEX TYPE STRING,
STDBETAF TYPE STRING,
XCONVADJ TYPE STRING,
XKOMPRESS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VTVRTMSEG_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_VTVRTMSEG_STR-KURSTG sy-vline 
WA_VTVRTMSEG_STR-KURSTB sy-vline 
WA_VTVRTMSEG_STR-BCURVE sy-vline 
WA_VTVRTMSEG_STR-BCURVEB sy-vline 
WA_VTVRTMSEG_STR-WPKURSART sy-vline 
WA_VTVRTMSEG_STR-IDXART sy-vline 
WA_VTVRTMSEG_STR-DVOLARTG sy-vline 
WA_VTVRTMSEG_STR-DVOLARTB sy-vline 
WA_VTVRTMSEG_STR-ZVOLARTG sy-vline 
WA_VTVRTMSEG_STR-ZVOLARTB sy-vline 
WA_VTVRTMSEG_STR-WVOLARTG sy-vline 
WA_VTVRTMSEG_STR-WVOLARTB sy-vline 
WA_VTVRTMSEG_STR-IXVOLARTG sy-vline 
WA_VTVRTMSEG_STR-IXVOLARTB sy-vline 
WA_VTVRTMSEG_STR-VNAME sy-vline 
WA_VTVRTMSEG_STR-CALCVERF sy-vline 
WA_VTVRTMSEG_STR-WPPVART sy-vline 
WA_VTVRTMSEG_STR-WKTAGE sy-vline 
WA_VTVRTMSEG_STR-SVOLART sy-vline 
WA_VTVRTMSEG_STR-XHOR_CASHF sy-vline 
WA_VTVRTMSEG_STR-XEXTBW sy-vline 
WA_VTVRTMSEG_STR-XDEST_T1 sy-vline 
WA_VTVRTMSEG_STR-XFUNC_T1 sy-vline 
WA_VTVRTMSEG_STR-XDEST_T2 sy-vline 
WA_VTVRTMSEG_STR-XFUNC_T2 sy-vline 
WA_VTVRTMSEG_STR-IDX sy-vline 
WA_VTVRTMSEG_STR-BFART sy-vline 
WA_VTVRTMSEG_STR-XSTDINDEX sy-vline 
WA_VTVRTMSEG_STR-STDBETAF sy-vline 
WA_VTVRTMSEG_STR-XCONVADJ sy-vline 
WA_VTVRTMSEG_STR-XKOMPRESS sy-vline      INTO ld_text SEPARATED BY SPACE.

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