ABAP Select data from SAP table VIWI02 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP VIWI02 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 VIWI02. 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 VIWI02 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_VIWI02 TYPE STANDARD TABLE OF VIWI02,
      WA_VIWI02 TYPE VIWI02,
      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: <VIWI02> TYPE VIWI02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VIWI02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VIWI02
  INTO TABLE IT_VIWI02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIWI02
*  INTO TABLE @DATA(IT_VIWI022).
*--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_VIWI02 INDEX 1 INTO DATA(WA_VIWI022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VIWI02 ASSIGNING <VIWI02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIWI02>-MANDT = 1.
<VIWI02>-BUKRS = 1.
<VIWI02>-SWENR = 1.
<VIWI02>-DATUM = 1.
<VIWI02>-FREMD1_TXT = 1.

ENDLOOP.

LOOP AT IT_VIWI02 INTO WA_VIWI02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIWI02-FREMD1_GES, sy-vline,
  WA_VIWI02-FREMD1_OW, sy-vline,
  WA_VIWI02-FREMD1_SW, sy-vline,
  WA_VIWI02-FREMD1_SR, sy-vline,
  WA_VIWI02-FREMD2_TXT, sy-vline,
  WA_VIWI02-FREMD2_GES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIWI02 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_VIWI02 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_VIWI02 INTO WA_VIWI02.


*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 SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_VIWI02-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIWI02-SWENR.
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_VIWI02_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
DATUM TYPE STRING,
FREMD1_TXT TYPE STRING,
FREMD1_GES TYPE STRING,
FREMD1_OW TYPE STRING,
FREMD1_SW TYPE STRING,
FREMD1_SR TYPE STRING,
FREMD2_TXT TYPE STRING,
FREMD2_GES TYPE STRING,
FREMD2_OW TYPE STRING,
FREMD2_SW TYPE STRING,
FREMD2_SR TYPE STRING,
FREMD3_TXT TYPE STRING,
FREMD3_GES TYPE STRING,
FREMD3_OW TYPE STRING,
FREMD3_SW TYPE STRING,
FREMD3_SR TYPE STRING,
FREMD4_TXT TYPE STRING,
FREMD4_GES TYPE STRING,
FREMD4_OW TYPE STRING,
FREMD4_SW TYPE STRING,
FREMD4_SR TYPE STRING,
FREMD5_TXT TYPE STRING,
FREMD5_GES TYPE STRING,
FREMD5_OW TYPE STRING,
FREMD5_SW TYPE STRING,
FREMD5_SR TYPE STRING,
FREMD6_TXT TYPE STRING,
FREMD6_GES TYPE STRING,
FREMD6_OW TYPE STRING,
FREMD6_SW TYPE STRING,
FREMD6_SR TYPE STRING,
FREMD7_TXT TYPE STRING,
FREMD7_GES TYPE STRING,
FREMD7_OW TYPE STRING,
FREMD7_SW TYPE STRING,
FREMD7_SR TYPE STRING,
FREMD8_TXT TYPE STRING,
FREMD8_GES TYPE STRING,
FREMD8_OW TYPE STRING,
FREMD8_SW TYPE STRING,
FREMD8_SR TYPE STRING,
FREMD9_TXT TYPE STRING,
FREMD9_GES TYPE STRING,
FREMD9_OW TYPE STRING,
FREMD9_SW TYPE STRING,
FREMD9_SR TYPE STRING,
VERLBK_TXT TYPE STRING,
VERLBK_GES TYPE STRING,
VERLBK_OW TYPE STRING,
VERLBK_SW TYPE STRING,
VERLBK_SR TYPE STRING,
EIGZI1_GES TYPE STRING,
EIGZI1_OW TYPE STRING,
EIGZI1_SW TYPE STRING,
EIGZI1_SR TYPE STRING,
EIGZI2_GES TYPE STRING,
EIGZI2_OW TYPE STRING,
EIGZI2_SW TYPE STRING,
EIGZI2_SR TYPE STRING,
EIGER1_GES TYPE STRING,
EIGER1_OW TYPE STRING,
EIGER1_SW TYPE STRING,
EIGER1_SR TYPE STRING,
EIGER2_GES TYPE STRING,
EIGER2_OW TYPE STRING,
EIGER2_SW TYPE STRING,
EIGER2_SR TYPE STRING,
EIGER3_GES TYPE STRING,
EIGER3_OW TYPE STRING,
EIGER3_SW TYPE STRING,
EIGER3_SR TYPE STRING,
EIGER4_GES TYPE STRING,
EIGER4_OW TYPE STRING,
EIGER4_SW TYPE STRING,
EIGER4_SR TYPE STRING,
EIGER4_TXT TYPE STRING,
SUMME_GES TYPE STRING,
SUMME_OW TYPE STRING,
SUMME_SW TYPE STRING,
SUMME_SR TYPE STRING,
EIG_GELDW TYPE STRING,
EIG_GELDG TYPE STRING,
EIG_SACHW TYPE STRING,
EIG_SACHG TYPE STRING,
EIG_BAUW TYPE STRING,
EIG_BAUG TYPE STRING,
EIG_GEBW TYPE STRING,
EIG_GEBG TYPE STRING,
EIG_SUMW TYPE STRING,
EIG_SUMG TYPE STRING,
EIG_ZINS1 TYPE STRING,
EIG_ZINS2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIWI02_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_VIWI02_STR-MANDT sy-vline 
WA_VIWI02_STR-BUKRS sy-vline 
WA_VIWI02_STR-SWENR sy-vline 
WA_VIWI02_STR-DATUM sy-vline 
WA_VIWI02_STR-FREMD1_TXT sy-vline 
WA_VIWI02_STR-FREMD1_GES sy-vline 
WA_VIWI02_STR-FREMD1_OW sy-vline 
WA_VIWI02_STR-FREMD1_SW sy-vline 
WA_VIWI02_STR-FREMD1_SR sy-vline 
WA_VIWI02_STR-FREMD2_TXT sy-vline 
WA_VIWI02_STR-FREMD2_GES sy-vline 
WA_VIWI02_STR-FREMD2_OW sy-vline 
WA_VIWI02_STR-FREMD2_SW sy-vline 
WA_VIWI02_STR-FREMD2_SR sy-vline 
WA_VIWI02_STR-FREMD3_TXT sy-vline 
WA_VIWI02_STR-FREMD3_GES sy-vline 
WA_VIWI02_STR-FREMD3_OW sy-vline 
WA_VIWI02_STR-FREMD3_SW sy-vline 
WA_VIWI02_STR-FREMD3_SR sy-vline 
WA_VIWI02_STR-FREMD4_TXT sy-vline 
WA_VIWI02_STR-FREMD4_GES sy-vline 
WA_VIWI02_STR-FREMD4_OW sy-vline 
WA_VIWI02_STR-FREMD4_SW sy-vline 
WA_VIWI02_STR-FREMD4_SR sy-vline 
WA_VIWI02_STR-FREMD5_TXT sy-vline 
WA_VIWI02_STR-FREMD5_GES sy-vline 
WA_VIWI02_STR-FREMD5_OW sy-vline 
WA_VIWI02_STR-FREMD5_SW sy-vline 
WA_VIWI02_STR-FREMD5_SR sy-vline 
WA_VIWI02_STR-FREMD6_TXT sy-vline 
WA_VIWI02_STR-FREMD6_GES sy-vline 
WA_VIWI02_STR-FREMD6_OW sy-vline 
WA_VIWI02_STR-FREMD6_SW sy-vline 
WA_VIWI02_STR-FREMD6_SR sy-vline 
WA_VIWI02_STR-FREMD7_TXT sy-vline 
WA_VIWI02_STR-FREMD7_GES sy-vline 
WA_VIWI02_STR-FREMD7_OW sy-vline 
WA_VIWI02_STR-FREMD7_SW sy-vline 
WA_VIWI02_STR-FREMD7_SR sy-vline 
WA_VIWI02_STR-FREMD8_TXT sy-vline 
WA_VIWI02_STR-FREMD8_GES sy-vline 
WA_VIWI02_STR-FREMD8_OW sy-vline 
WA_VIWI02_STR-FREMD8_SW sy-vline 
WA_VIWI02_STR-FREMD8_SR sy-vline 
WA_VIWI02_STR-FREMD9_TXT sy-vline 
WA_VIWI02_STR-FREMD9_GES sy-vline 
WA_VIWI02_STR-FREMD9_OW sy-vline 
WA_VIWI02_STR-FREMD9_SW sy-vline 
WA_VIWI02_STR-FREMD9_SR sy-vline 
WA_VIWI02_STR-VERLBK_TXT sy-vline 
WA_VIWI02_STR-VERLBK_GES sy-vline 
WA_VIWI02_STR-VERLBK_OW sy-vline 
WA_VIWI02_STR-VERLBK_SW sy-vline 
WA_VIWI02_STR-VERLBK_SR sy-vline 
WA_VIWI02_STR-EIGZI1_GES sy-vline 
WA_VIWI02_STR-EIGZI1_OW sy-vline 
WA_VIWI02_STR-EIGZI1_SW sy-vline 
WA_VIWI02_STR-EIGZI1_SR sy-vline 
WA_VIWI02_STR-EIGZI2_GES sy-vline 
WA_VIWI02_STR-EIGZI2_OW sy-vline 
WA_VIWI02_STR-EIGZI2_SW sy-vline 
WA_VIWI02_STR-EIGZI2_SR sy-vline 
WA_VIWI02_STR-EIGER1_GES sy-vline 
WA_VIWI02_STR-EIGER1_OW sy-vline 
WA_VIWI02_STR-EIGER1_SW sy-vline 
WA_VIWI02_STR-EIGER1_SR sy-vline 
WA_VIWI02_STR-EIGER2_GES sy-vline 
WA_VIWI02_STR-EIGER2_OW sy-vline 
WA_VIWI02_STR-EIGER2_SW sy-vline 
WA_VIWI02_STR-EIGER2_SR sy-vline 
WA_VIWI02_STR-EIGER3_GES sy-vline 
WA_VIWI02_STR-EIGER3_OW sy-vline 
WA_VIWI02_STR-EIGER3_SW sy-vline 
WA_VIWI02_STR-EIGER3_SR sy-vline 
WA_VIWI02_STR-EIGER4_GES sy-vline 
WA_VIWI02_STR-EIGER4_OW sy-vline 
WA_VIWI02_STR-EIGER4_SW sy-vline 
WA_VIWI02_STR-EIGER4_SR sy-vline 
WA_VIWI02_STR-EIGER4_TXT sy-vline 
WA_VIWI02_STR-SUMME_GES sy-vline 
WA_VIWI02_STR-SUMME_OW sy-vline 
WA_VIWI02_STR-SUMME_SW sy-vline 
WA_VIWI02_STR-SUMME_SR sy-vline 
WA_VIWI02_STR-EIG_GELDW sy-vline 
WA_VIWI02_STR-EIG_GELDG sy-vline 
WA_VIWI02_STR-EIG_SACHW sy-vline 
WA_VIWI02_STR-EIG_SACHG sy-vline 
WA_VIWI02_STR-EIG_BAUW sy-vline 
WA_VIWI02_STR-EIG_BAUG sy-vline 
WA_VIWI02_STR-EIG_GEBW sy-vline 
WA_VIWI02_STR-EIG_GEBG sy-vline 
WA_VIWI02_STR-EIG_SUMW sy-vline 
WA_VIWI02_STR-EIG_SUMG sy-vline 
WA_VIWI02_STR-EIG_ZINS1 sy-vline 
WA_VIWI02_STR-EIG_ZINS2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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