ABAP Select data from SAP table FIEG_S_WHT_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIEG_S_WHT_ITEM
*  INTO TABLE @DATA(IT_FIEG_S_WHT_ITEM2).
*--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_FIEG_S_WHT_ITEM INDEX 1 INTO DATA(WA_FIEG_S_WHT_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIEG_S_WHT_ITEM>-SERIALNUMBER = 1.
<FIEG_S_WHT_ITEM>-VENDORTAXREGISTRATIONNUMBER = 1.
<FIEG_S_WHT_ITEM>-VENDORNATIONALID = 1.
<FIEG_S_WHT_ITEM>-VENDORNAME = 1.
<FIEG_S_WHT_ITEM>-VENDORADDRESS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIEG_S_WHT_ITEM-TAXAUTHORITYNAME, sy-vline,
  WA_FIEG_S_WHT_ITEM-TAXAUTHORITYCODE, sy-vline,
  WA_FIEG_S_WHT_ITEM-PAYMENTDATE, sy-vline,
  WA_FIEG_S_WHT_ITEM-TYPEOFSERVICECODE, sy-vline,
  WA_FIEG_S_WHT_ITEM-PAYMENTAMOUNT, sy-vline,
  WA_FIEG_S_WHT_ITEM-DISCOUNTCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIEG_S_WHT_ITEM 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_FIEG_S_WHT_ITEM 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_FIEG_S_WHT_ITEM INTO WA_FIEG_S_WHT_ITEM.


*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 AC152, internal->external for field PAYMENTAMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FIEG_S_WHT_ITEM-PAYMENTAMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIEG_S_WHT_ITEM-PAYMENTAMOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WHTAMOUNTFORTHENETAMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FIEG_S_WHT_ITEM-WHTAMOUNTFORTHENETAMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIEG_S_WHT_ITEM-WHTAMOUNTFORTHENETAMOUNT.
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_FIEG_S_WHT_ITEM_STR, 
SERIALNUMBER TYPE STRING,
VENDORTAXREGISTRATIONNUMBER TYPE STRING,
VENDORNATIONALID TYPE STRING,
VENDORNAME TYPE STRING,
VENDORADDRESS TYPE STRING,
TAXAUTHORITYNAME TYPE STRING,
TAXAUTHORITYCODE TYPE STRING,
PAYMENTDATE TYPE STRING,
TYPEOFSERVICECODE TYPE STRING,
PAYMENTAMOUNT TYPE STRING,
DISCOUNTCODE TYPE STRING,
DATEOFDISCOUNT TYPE STRING,
NETAMOUNTAFTERDISCOUNT TYPE STRING,
WHTRATE TYPE STRING,
WHTAMOUNTFORTHENETAMOUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIEG_S_WHT_ITEM_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_FIEG_S_WHT_ITEM_STR-SERIALNUMBER sy-vline 
WA_FIEG_S_WHT_ITEM_STR-VENDORTAXREGISTRATIONNUMBER sy-vline 
WA_FIEG_S_WHT_ITEM_STR-VENDORNATIONALID sy-vline 
WA_FIEG_S_WHT_ITEM_STR-VENDORNAME sy-vline 
WA_FIEG_S_WHT_ITEM_STR-VENDORADDRESS sy-vline 
WA_FIEG_S_WHT_ITEM_STR-TAXAUTHORITYNAME sy-vline 
WA_FIEG_S_WHT_ITEM_STR-TAXAUTHORITYCODE sy-vline 
WA_FIEG_S_WHT_ITEM_STR-PAYMENTDATE sy-vline 
WA_FIEG_S_WHT_ITEM_STR-TYPEOFSERVICECODE sy-vline 
WA_FIEG_S_WHT_ITEM_STR-PAYMENTAMOUNT sy-vline 
WA_FIEG_S_WHT_ITEM_STR-DISCOUNTCODE sy-vline 
WA_FIEG_S_WHT_ITEM_STR-DATEOFDISCOUNT sy-vline 
WA_FIEG_S_WHT_ITEM_STR-NETAMOUNTAFTERDISCOUNT sy-vline 
WA_FIEG_S_WHT_ITEM_STR-WHTRATE sy-vline 
WA_FIEG_S_WHT_ITEM_STR-WHTAMOUNTFORTHENETAMOUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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