ABAP Select data from SAP table VVIGWARFLZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VVIGWARFLZ
*  INTO TABLE @DATA(IT_VVIGWARFLZ2).
*--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_VVIGWARFLZ INDEX 1 INTO DATA(WA_VVIGWARFLZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VVIGWARFLZ>-MANDT = 1.
<VVIGWARFLZ>-ARFLNO = 1.
<VVIGWARFLZ>-VERSION = 1.
<VVIGWARFLZ>-DGUELBIS = 1.
<VVIGWARFLZ>-DGUELAB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VVIGWARFLZ-FLLBEZ, sy-vline,
  WA_VVIGWARFLZ-DTRAGFKT, sy-vline,
  WA_VVIGWARFLZ-TFEINHT, sy-vline,
  WA_VVIGWARFLZ-DRAUMHOE, sy-vline,
  WA_VVIGWARFLZ-RHEINHT, sy-vline,
  WA_VVIGWARFLZ-UMBRAUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VVIGWARFLZ 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_VVIGWARFLZ 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_VVIGWARFLZ INTO WA_VVIGWARFLZ.


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

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

*Conversion exit CUNIT, internal->external for field REINHT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_VVIGWARFLZ-REINHT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VVIGWARFLZ-REINHT.
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_VVIGWARFLZ_STR, 
MANDT TYPE STRING,
ARFLNO TYPE STRING,
VERSION TYPE STRING,
DGUELBIS TYPE STRING,
DGUELAB TYPE STRING,
FLLBEZ TYPE STRING,
DTRAGFKT TYPE STRING,
TFEINHT TYPE STRING,
DRAUMHOE TYPE STRING,
RHEINHT TYPE STRING,
UMBRAUM TYPE STRING,
REINHT TYPE STRING,
FLOT TYPE STRING,
FLAA TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VVIGWARFLZ_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_VVIGWARFLZ_STR-MANDT sy-vline 
WA_VVIGWARFLZ_STR-ARFLNO sy-vline 
WA_VVIGWARFLZ_STR-VERSION sy-vline 
WA_VVIGWARFLZ_STR-DGUELBIS sy-vline 
WA_VVIGWARFLZ_STR-DGUELAB sy-vline 
WA_VVIGWARFLZ_STR-FLLBEZ sy-vline 
WA_VVIGWARFLZ_STR-DTRAGFKT sy-vline 
WA_VVIGWARFLZ_STR-TFEINHT sy-vline 
WA_VVIGWARFLZ_STR-DRAUMHOE sy-vline 
WA_VVIGWARFLZ_STR-RHEINHT sy-vline 
WA_VVIGWARFLZ_STR-UMBRAUM sy-vline 
WA_VVIGWARFLZ_STR-REINHT sy-vline 
WA_VVIGWARFLZ_STR-FLOT sy-vline 
WA_VVIGWARFLZ_STR-FLAA sy-vline 
WA_VVIGWARFLZ_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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