ABAP Select data from SAP table V_TVCPLAK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_TVCPLAK 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_TVCPLAK. 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_TVCPLAK 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_TVCPLAK TYPE STANDARD TABLE OF V_TVCPLAK,
      WA_V_TVCPLAK TYPE V_TVCPLAK,
      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_TVCPLAK> TYPE V_TVCPLAK.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_TVCPLAK
*  INTO TABLE @DATA(IT_V_TVCPLAK2).
*--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_TVCPLAK INDEX 1 INTO DATA(WA_V_TVCPLAK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_TVCPLAK>-MANDT = 1.
<V_TVCPLAK>-LFARN = 1.
<V_TVCPLAK>-AUARV = 1.
<V_TVCPLAK>-PSTYV = 1.
<V_TVCPLAK>-AUBED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_TVCPLAK-AUZUS, sy-vline,
  WA_V_TVCPLAK-ETBED, sy-vline,
  WA_V_TVCPLAK-GRUAK, sy-vline,
  WA_V_TVCPLAK-GRUAP, sy-vline,
  WA_V_TVCPLAK-GRUKD, sy-vline,
  WA_V_TVCPLAK-GRUPA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_TVCPLAK 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_TVCPLAK 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_TVCPLAK INTO WA_V_TVCPLAK.


*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 AUARV
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_V_TVCPLAK-AUARV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_TVCPLAK-AUARV.
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_TVCPLAK_STR, 
MANDT TYPE STRING,
LFARN TYPE STRING,
AUARV TYPE STRING,
PSTYV TYPE STRING,
AUBED TYPE STRING,
AUZUS TYPE STRING,
ETBED TYPE STRING,
GRUAK TYPE STRING,
GRUAP TYPE STRING,
GRUKD TYPE STRING,
GRUPA TYPE STRING,
GRUET TYPE STRING,
POSVO TYPE STRING,
PLMIN TYPE STRING,
UPFLU TYPE STRING,
GRUVS TYPE STRING,
VTEXTL TYPE STRING,
VTEXTA TYPE STRING,
GRUAK_AIP TYPE STRING,
GRUAP_AIP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_TVCPLAK_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_TVCPLAK_STR-MANDT sy-vline 
WA_V_TVCPLAK_STR-LFARN sy-vline 
WA_V_TVCPLAK_STR-AUARV sy-vline 
WA_V_TVCPLAK_STR-PSTYV sy-vline 
WA_V_TVCPLAK_STR-AUBED sy-vline 
WA_V_TVCPLAK_STR-AUZUS sy-vline 
WA_V_TVCPLAK_STR-ETBED sy-vline 
WA_V_TVCPLAK_STR-GRUAK sy-vline 
WA_V_TVCPLAK_STR-GRUAP sy-vline 
WA_V_TVCPLAK_STR-GRUKD sy-vline 
WA_V_TVCPLAK_STR-GRUPA sy-vline 
WA_V_TVCPLAK_STR-GRUET sy-vline 
WA_V_TVCPLAK_STR-POSVO sy-vline 
WA_V_TVCPLAK_STR-PLMIN sy-vline 
WA_V_TVCPLAK_STR-UPFLU sy-vline 
WA_V_TVCPLAK_STR-GRUVS sy-vline 
WA_V_TVCPLAK_STR-VTEXTL sy-vline 
WA_V_TVCPLAK_STR-VTEXTA sy-vline 
WA_V_TVCPLAK_STR-GRUAK_AIP sy-vline 
WA_V_TVCPLAK_STR-GRUAP_AIP sy-vline      INTO ld_text SEPARATED BY SPACE.

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