ABAP Select data from SAP table VV_T161_VL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VV_T161_VL 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 VV_T161_VL. 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 VV_T161_VL 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_VV_T161_VL TYPE STANDARD TABLE OF VV_T161_VL,
      WA_VV_T161_VL TYPE VV_T161_VL,
      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: <VV_T161_VL> TYPE VV_T161_VL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VV_T161_VL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VV_T161_VL
  INTO TABLE IT_VV_T161_VL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VV_T161_VL
*  INTO TABLE @DATA(IT_VV_T161_VL2).
*--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_VV_T161_VL INDEX 1 INTO DATA(WA_VV_T161_VL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VV_T161_VL ASSIGNING <VV_T161_VL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VV_T161_VL>-MANDT = 1.
<VV_T161_VL>-BSTYP = 1.
<VV_T161_VL>-BSART = 1.
<VV_T161_VL>-BSAKZ = 1.
<VV_T161_VL>-PINCR = 1.

ENDLOOP.

LOOP AT IT_VV_T161_VL INTO WA_VV_T161_VL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VV_T161_VL-NUMKI, sy-vline,
  WA_VV_T161_VL-NUMKE, sy-vline,
  WA_VV_T161_VL-BREFN, sy-vline,
  WA_VV_T161_VL-ABVOR, sy-vline,
  WA_VV_T161_VL-STAFO, sy-vline,
  WA_VV_T161_VL-UPINC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VV_T161_VL 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_VV_T161_VL 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_VV_T161_VL INTO WA_VV_T161_VL.


*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 ALPHA, internal->external for field STAFO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VV_T161_VL-STAFO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VV_T161_VL-STAFO.
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_VV_T161_VL_STR, 
MANDT TYPE STRING,
BSTYP TYPE STRING,
BSART TYPE STRING,
BSAKZ TYPE STRING,
PINCR TYPE STRING,
NUMKI TYPE STRING,
NUMKE TYPE STRING,
BREFN TYPE STRING,
ABVOR TYPE STRING,
STAFO TYPE STRING,
UPINC TYPE STRING,
STAKO TYPE STRING,
NUMKA TYPE STRING,
LPHIS TYPE STRING,
GSFRG TYPE STRING,
VARIANTE TYPE STRING,
SHENQ TYPE STRING,
KZALE TYPE STRING,
ABGEBOT TYPE STRING,
KORNR TYPE STRING,
UMLIF TYPE STRING,
AR_OBJECT TYPE STRING,
BATXT TYPE STRING,
XLOKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VV_T161_VL_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_VV_T161_VL_STR-MANDT sy-vline 
WA_VV_T161_VL_STR-BSTYP sy-vline 
WA_VV_T161_VL_STR-BSART sy-vline 
WA_VV_T161_VL_STR-BSAKZ sy-vline 
WA_VV_T161_VL_STR-PINCR sy-vline 
WA_VV_T161_VL_STR-NUMKI sy-vline 
WA_VV_T161_VL_STR-NUMKE sy-vline 
WA_VV_T161_VL_STR-BREFN sy-vline 
WA_VV_T161_VL_STR-ABVOR sy-vline 
WA_VV_T161_VL_STR-STAFO sy-vline 
WA_VV_T161_VL_STR-UPINC sy-vline 
WA_VV_T161_VL_STR-STAKO sy-vline 
WA_VV_T161_VL_STR-NUMKA sy-vline 
WA_VV_T161_VL_STR-LPHIS sy-vline 
WA_VV_T161_VL_STR-GSFRG sy-vline 
WA_VV_T161_VL_STR-VARIANTE sy-vline 
WA_VV_T161_VL_STR-SHENQ sy-vline 
WA_VV_T161_VL_STR-KZALE sy-vline 
WA_VV_T161_VL_STR-ABGEBOT sy-vline 
WA_VV_T161_VL_STR-KORNR sy-vline 
WA_VV_T161_VL_STR-UMLIF sy-vline 
WA_VV_T161_VL_STR-AR_OBJECT sy-vline 
WA_VV_T161_VL_STR-BATXT sy-vline 
WA_VV_T161_VL_STR-XLOKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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