ABAP Select data from SAP table V_TVLK 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 V_TVLK 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_TVLK. 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_TVLK 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_TVLK TYPE STANDARD TABLE OF V_TVLK,
      WA_V_TVLK TYPE V_TVLK,
      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_TVLK> TYPE V_TVLK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TVLK
*  INTO TABLE @DATA(IT_V_TVLK2).
*--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_TVLK INDEX 1 INTO DATA(WA_V_TVLK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TVLK>-MANDT = 1.
<V_TVLK>-LFART = 1.
<V_TVLK>-KOPGR = 1.
<V_TVLK>-UEVOR = 1.
<V_TVLK>-TXN08 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TVLK-UMFNG, sy-vline,
  WA_V_TVLK-NUMKI, sy-vline,
  WA_V_TVLK-NUMKE, sy-vline,
  WA_V_TVLK-INCPO, sy-vline,
  WA_V_TVLK-AUFER, sy-vline,
  WA_V_TVLK-DAART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TVLK 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_TVLK 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_TVLK INTO WA_V_TVLK.


*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 AUART, internal->external for field DAART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_V_TVLK-DAART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVLK-DAART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STGAK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_TVLK-STGAK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVLK-STGAK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field INT_TOCD_OFFSET_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_TVLK-INT_TOCD_OFFSET_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVLK-INT_TOCD_OFFSET_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EXT_TOCD_OFFSET_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_TVLK-EXT_TOCD_OFFSET_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVLK-EXT_TOCD_OFFSET_UNIT.
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_TVLK_STR, 
MANDT TYPE STRING,
LFART TYPE STRING,
KOPGR TYPE STRING,
UEVOR TYPE STRING,
TXN08 TYPE STRING,
UMFNG TYPE STRING,
NUMKI TYPE STRING,
NUMKE TYPE STRING,
INCPO TYPE STRING,
AUFER TYPE STRING,
DAART TYPE STRING,
POBED TYPE STRING,
VBTYP TYPE STRING,
PARGR TYPE STRING,
REGLG TYPE STRING,
ROUTF TYPE STRING,
TXTGR TYPE STRING,
KAPPL TYPE STRING,
KALSM TYPE STRING,
KSCHL TYPE STRING,
STGAK TYPE STRING,
VTEXT TYPE STRING,
TRSPG TYPE STRING,
TDIIX TYPE STRING,
EXCOK TYPE STRING,
NEUTE TYPE STRING,
FEHGR TYPE STRING,
LNSPL TYPE STRING,
AVERP TYPE STRING,
PM_ITEM_GEN TYPE STRING,
DBTCH TYPE STRING,
DSFAD TYPE STRING,
OIDELDCM TYPE STRING,
RESTORE_ALLOC TYPE STRING,
SGT_IGNORE_SEG TYPE STRING,
INT_TOCD_OFFSET TYPE STRING,
INT_TOCD_OFFSET_UNIT TYPE STRING,
EXT_TOCD_OFFSET TYPE STRING,
EXT_TOCD_OFFSET_UNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TVLK_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_TVLK_STR-MANDT sy-vline 
WA_V_TVLK_STR-LFART sy-vline 
WA_V_TVLK_STR-KOPGR sy-vline 
WA_V_TVLK_STR-UEVOR sy-vline 
WA_V_TVLK_STR-TXN08 sy-vline 
WA_V_TVLK_STR-UMFNG sy-vline 
WA_V_TVLK_STR-NUMKI sy-vline 
WA_V_TVLK_STR-NUMKE sy-vline 
WA_V_TVLK_STR-INCPO sy-vline 
WA_V_TVLK_STR-AUFER sy-vline 
WA_V_TVLK_STR-DAART sy-vline 
WA_V_TVLK_STR-POBED sy-vline 
WA_V_TVLK_STR-VBTYP sy-vline 
WA_V_TVLK_STR-PARGR sy-vline 
WA_V_TVLK_STR-REGLG sy-vline 
WA_V_TVLK_STR-ROUTF sy-vline 
WA_V_TVLK_STR-TXTGR sy-vline 
WA_V_TVLK_STR-KAPPL sy-vline 
WA_V_TVLK_STR-KALSM sy-vline 
WA_V_TVLK_STR-KSCHL sy-vline 
WA_V_TVLK_STR-STGAK sy-vline 
WA_V_TVLK_STR-VTEXT sy-vline 
WA_V_TVLK_STR-TRSPG sy-vline 
WA_V_TVLK_STR-TDIIX sy-vline 
WA_V_TVLK_STR-EXCOK sy-vline 
WA_V_TVLK_STR-NEUTE sy-vline 
WA_V_TVLK_STR-FEHGR sy-vline 
WA_V_TVLK_STR-LNSPL sy-vline 
WA_V_TVLK_STR-AVERP sy-vline 
WA_V_TVLK_STR-PM_ITEM_GEN sy-vline 
WA_V_TVLK_STR-DBTCH sy-vline 
WA_V_TVLK_STR-DSFAD sy-vline 
WA_V_TVLK_STR-OIDELDCM sy-vline 
WA_V_TVLK_STR-RESTORE_ALLOC sy-vline 
WA_V_TVLK_STR-SGT_IGNORE_SEG sy-vline 
WA_V_TVLK_STR-INT_TOCD_OFFSET sy-vline 
WA_V_TVLK_STR-INT_TOCD_OFFSET_UNIT sy-vline 
WA_V_TVLK_STR-EXT_TOCD_OFFSET sy-vline 
WA_V_TVLK_STR-EXT_TOCD_OFFSET_UNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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