ABAP Select data from SAP table WVIGBA3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WVIGBA3 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 WVIGBA3. 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 WVIGBA3 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_WVIGBA3 TYPE STANDARD TABLE OF WVIGBA3,
      WA_WVIGBA3 TYPE WVIGBA3,
      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: <WVIGBA3> TYPE WVIGBA3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_WVIGBA3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM WVIGBA3
  INTO TABLE IT_WVIGBA3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WVIGBA3
*  INTO TABLE @DATA(IT_WVIGBA32).
*--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_WVIGBA3 INDEX 1 INTO DATA(WA_WVIGBA32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_WVIGBA3 ASSIGNING <WVIGBA3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WVIGBA3>-MANDT = 1.
<WVIGBA3>-SGRUNDB = 1.
<WVIGBA3>-SNRABT3 = 1.
<WVIGBA3>-NRANG = 1.
<WVIGBA3>-XGRSTLST = 1.

ENDLOOP.

LOOP AT IT_WVIGBA3 INTO WA_WVIGBA3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WVIGBA3-RGRSTLST, sy-vline,
  WA_WVIGBA3-DBEINTR, sy-vline,
  WA_WVIGBA3-DEINTRAG, sy-vline,
  WA_WVIGBA3-BDARLEH, sy-vline,
  WA_WVIGBA3-WAEBEZ, sy-vline,
  WA_WVIGBA3-RBELAST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WVIGBA3 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_WVIGBA3 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_WVIGBA3 INTO WA_WVIGBA3.


*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 XNRA3
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WVIGBA3-XNRA3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WVIGBA3-XNRA3.
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_WVIGBA3_STR, 
MANDT TYPE STRING,
SGRUNDB TYPE STRING,
SNRABT3 TYPE STRING,
NRANG TYPE STRING,
XGRSTLST TYPE STRING,
RGRSTLST TYPE STRING,
DBEINTR TYPE STRING,
DEINTRAG TYPE STRING,
BDARLEH TYPE STRING,
WAEBEZ TYPE STRING,
RBELAST TYPE STRING,
NRDARLEH TYPE STRING,
XBELAST TYPE STRING,
BNOMIN TYPE STRING,
BEFFECT TYPE STRING,
XGLAUB TYPE STRING,
ZGRUSCH TYPE STRING,
JREVAL TYPE STRING,
ZNEBENL TYPE STRING,
JLOESCH TYPE STRING,
JEIGENR TYPE STRING,
DAUSZGV TYPE STRING,
JKZLOE TYPE STRING,
XNRA3 TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WVIGBA3_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_WVIGBA3_STR-MANDT sy-vline 
WA_WVIGBA3_STR-SGRUNDB sy-vline 
WA_WVIGBA3_STR-SNRABT3 sy-vline 
WA_WVIGBA3_STR-NRANG sy-vline 
WA_WVIGBA3_STR-XGRSTLST sy-vline 
WA_WVIGBA3_STR-RGRSTLST sy-vline 
WA_WVIGBA3_STR-DBEINTR sy-vline 
WA_WVIGBA3_STR-DEINTRAG sy-vline 
WA_WVIGBA3_STR-BDARLEH sy-vline 
WA_WVIGBA3_STR-WAEBEZ sy-vline 
WA_WVIGBA3_STR-RBELAST sy-vline 
WA_WVIGBA3_STR-NRDARLEH sy-vline 
WA_WVIGBA3_STR-XBELAST sy-vline 
WA_WVIGBA3_STR-BNOMIN sy-vline 
WA_WVIGBA3_STR-BEFFECT sy-vline 
WA_WVIGBA3_STR-XGLAUB sy-vline 
WA_WVIGBA3_STR-ZGRUSCH sy-vline 
WA_WVIGBA3_STR-JREVAL sy-vline 
WA_WVIGBA3_STR-ZNEBENL sy-vline 
WA_WVIGBA3_STR-JLOESCH sy-vline 
WA_WVIGBA3_STR-JEIGENR sy-vline 
WA_WVIGBA3_STR-DAUSZGV sy-vline 
WA_WVIGBA3_STR-JKZLOE sy-vline 
WA_WVIGBA3_STR-XNRA3 sy-vline 
WA_WVIGBA3_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.