ABAP Select data from SAP table TBVZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TBVZ
*  INTO TABLE @DATA(IT_TBVZ2).
*--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_TBVZ INDEX 1 INTO DATA(WA_TBVZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TBVZ>-MANDT = 1.
<TBVZ>-ERKRS = 1.
<TBVZ>-BERNAME = 1.
<TBVZ>-INDX = 1.
<TBVZ>-INDXDA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TBVZ-UNAME, sy-vline,
  WA_TBVZ-GDATE, sy-vline,
  WA_TBVZ-MODFLAG, sy-vline,
  WA_TBVZ-MODCN, sy-vline,
  WA_TBVZ-MODNA, sy-vline,
  WA_TBVZ-MODDA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TBVZ 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_TBVZ 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_TBVZ INTO WA_TBVZ.


*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_TBVZ_STR, 
MANDT TYPE STRING,
ERKRS TYPE STRING,
BERNAME TYPE STRING,
INDX TYPE STRING,
INDXDA TYPE STRING,
UNAME TYPE STRING,
GDATE TYPE STRING,
MODFLAG TYPE STRING,
MODCN TYPE STRING,
MODNA TYPE STRING,
MODDA TYPE STRING,
CNSUB TYPE STRING,
LASUB TYPE STRING,
DVERS TYPE STRING,
EPOS TYPE STRING,
SECU TYPE STRING,
TFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TBVZ_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_TBVZ_STR-MANDT sy-vline 
WA_TBVZ_STR-ERKRS sy-vline 
WA_TBVZ_STR-BERNAME sy-vline 
WA_TBVZ_STR-INDX sy-vline 
WA_TBVZ_STR-INDXDA sy-vline 
WA_TBVZ_STR-UNAME sy-vline 
WA_TBVZ_STR-GDATE sy-vline 
WA_TBVZ_STR-MODFLAG sy-vline 
WA_TBVZ_STR-MODCN sy-vline 
WA_TBVZ_STR-MODNA sy-vline 
WA_TBVZ_STR-MODDA sy-vline 
WA_TBVZ_STR-CNSUB sy-vline 
WA_TBVZ_STR-LASUB sy-vline 
WA_TBVZ_STR-DVERS sy-vline 
WA_TBVZ_STR-EPOS sy-vline 
WA_TBVZ_STR-SECU sy-vline 
WA_TBVZ_STR-TFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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