ABAP Select data from SAP table V_156_VC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_156_VC 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_156_VC. 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_156_VC 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_156_VC TYPE STANDARD TABLE OF V_156_VC,
      WA_V_156_VC TYPE V_156_VC,
      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_156_VC> TYPE V_156_VC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_156_VC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_156_VC
  INTO TABLE IT_V_156_VC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_156_VC
*  INTO TABLE @DATA(IT_V_156_VC2).
*--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_156_VC INDEX 1 INTO DATA(WA_V_156_VC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_156_VC ASSIGNING <V_156_VC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_156_VC>-MANDT = 1.
<V_156_VC>-BWART = 1.
<V_156_VC>-SHKZG = 1.
<V_156_VC>-KZWES = 1.
<V_156_VC>-KZVBU = 1.

ENDLOOP.

LOOP AT IT_V_156_VC INTO WA_V_156_VC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_156_VC-KZDRU, sy-vline,
  WA_V_156_VC-KZKON, sy-vline,
  WA_V_156_VC-RSTYP, sy-vline,
  WA_V_156_VC-SELPA, sy-vline,
  WA_V_156_VC-XLAUT, sy-vline,
  WA_V_156_VC-KZSTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_156_VC 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_156_VC 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_156_VC INTO WA_V_156_VC.


*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_V_156_VC_STR, 
MANDT TYPE STRING,
BWART TYPE STRING,
SHKZG TYPE STRING,
KZWES TYPE STRING,
KZVBU TYPE STRING,
KZDRU TYPE STRING,
KZKON TYPE STRING,
RSTYP TYPE STRING,
SELPA TYPE STRING,
XLAUT TYPE STRING,
KZSTR TYPE STRING,
KZGRU TYPE STRING,
XINVB TYPE STRING,
KZBWA TYPE STRING,
XSTBW TYPE STRING,
XPBED TYPE STRING,
XWSBR TYPE STRING,
KZMHD TYPE STRING,
KZCLA TYPE STRING,
XKOKO TYPE STRING,
XKCFC TYPE STRING,
CHNEU TYPE STRING,
RULES TYPE STRING,
XOARC TYPE STRING,
XNEBE TYPE STRING,
BUSTR TYPE STRING,
KZDIR TYPE STRING,
MILL_CPCONF TYPE STRING,
CO_WIPB_CPCONF TYPE STRING,
XWIPB TYPE STRING,
MVT_SOURCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_156_VC_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_156_VC_STR-MANDT sy-vline 
WA_V_156_VC_STR-BWART sy-vline 
WA_V_156_VC_STR-SHKZG sy-vline 
WA_V_156_VC_STR-KZWES sy-vline 
WA_V_156_VC_STR-KZVBU sy-vline 
WA_V_156_VC_STR-KZDRU sy-vline 
WA_V_156_VC_STR-KZKON sy-vline 
WA_V_156_VC_STR-RSTYP sy-vline 
WA_V_156_VC_STR-SELPA sy-vline 
WA_V_156_VC_STR-XLAUT sy-vline 
WA_V_156_VC_STR-KZSTR sy-vline 
WA_V_156_VC_STR-KZGRU sy-vline 
WA_V_156_VC_STR-XINVB sy-vline 
WA_V_156_VC_STR-KZBWA sy-vline 
WA_V_156_VC_STR-XSTBW sy-vline 
WA_V_156_VC_STR-XPBED sy-vline 
WA_V_156_VC_STR-XWSBR sy-vline 
WA_V_156_VC_STR-KZMHD sy-vline 
WA_V_156_VC_STR-KZCLA sy-vline 
WA_V_156_VC_STR-XKOKO sy-vline 
WA_V_156_VC_STR-XKCFC sy-vline 
WA_V_156_VC_STR-CHNEU sy-vline 
WA_V_156_VC_STR-RULES sy-vline 
WA_V_156_VC_STR-XOARC sy-vline 
WA_V_156_VC_STR-XNEBE sy-vline 
WA_V_156_VC_STR-BUSTR sy-vline 
WA_V_156_VC_STR-KZDIR sy-vline 
WA_V_156_VC_STR-MILL_CPCONF sy-vline 
WA_V_156_VC_STR-CO_WIPB_CPCONF sy-vline 
WA_V_156_VC_STR-XWIPB sy-vline 
WA_V_156_VC_STR-MVT_SOURCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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