ABAP Select data from SAP table IDKR_S_ASSET_TAX_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDKR_S_ASSET_TAX_DATA
*  INTO TABLE @DATA(IT_IDKR_S_ASSET_TAX_DATA2).
*--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_IDKR_S_ASSET_TAX_DATA INDEX 1 INTO DATA(WA_IDKR_S_ASSET_TAX_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDKR_S_ASSET_TAX_DATA>-COMPANY_CODE = 1.
<IDKR_S_ASSET_TAX_DATA>-ASSET_CATEGORY = 1.
<IDKR_S_ASSET_TAX_DATA>-ASSET_CLASS = 1.
<IDKR_S_ASSET_TAX_DATA>-MAIN_ASSET_NUMBER = 1.
<IDKR_S_ASSET_TAX_DATA>-SUB_ASSET_NUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDKR_S_ASSET_TAX_DATA-FISCAL_YEAR, sy-vline,
  WA_IDKR_S_ASSET_TAX_DATA-ASSET_QUANTITY, sy-vline,
  WA_IDKR_S_ASSET_TAX_DATA-TAX_ITEM_GROUP, sy-vline,
  WA_IDKR_S_ASSET_TAX_DATA-LINE_ITEM_IDENT, sy-vline,
  WA_IDKR_S_ASSET_TAX_DATA-DOCUMENT_NUM, sy-vline,
  WA_IDKR_S_ASSET_TAX_DATA-DOCUMENT_LINE_ITEM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDKR_S_ASSET_TAX_DATA 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_IDKR_S_ASSET_TAX_DATA 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_IDKR_S_ASSET_TAX_DATA INTO WA_IDKR_S_ASSET_TAX_DATA.


*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 ASSET_CLASS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDKR_S_ASSET_TAX_DATA-ASSET_CLASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDKR_S_ASSET_TAX_DATA-ASSET_CLASS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MAIN_ASSET_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDKR_S_ASSET_TAX_DATA-MAIN_ASSET_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDKR_S_ASSET_TAX_DATA-MAIN_ASSET_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SUB_ASSET_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDKR_S_ASSET_TAX_DATA-SUB_ASSET_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDKR_S_ASSET_TAX_DATA-SUB_ASSET_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field FISCAL_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_IDKR_S_ASSET_TAX_DATA-FISCAL_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDKR_S_ASSET_TAX_DATA-FISCAL_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCUMENT_NUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IDKR_S_ASSET_TAX_DATA-DOCUMENT_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDKR_S_ASSET_TAX_DATA-DOCUMENT_NUM.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit AU132, internal->external for field TOTAL_TAX_AMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_IDKR_S_ASSET_TAX_DATA-TOTAL_TAX_AMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDKR_S_ASSET_TAX_DATA-TOTAL_TAX_AMOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field ITEM_AMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_IDKR_S_ASSET_TAX_DATA-ITEM_AMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDKR_S_ASSET_TAX_DATA-ITEM_AMOUNT.
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_IDKR_S_ASSET_TAX_DATA_STR, 
COMPANY_CODE TYPE STRING,
ASSET_CATEGORY TYPE STRING,
ASSET_CLASS TYPE STRING,
MAIN_ASSET_NUMBER TYPE STRING,
SUB_ASSET_NUMBER TYPE STRING,
FISCAL_YEAR TYPE STRING,
ASSET_QUANTITY TYPE STRING,
TAX_ITEM_GROUP TYPE STRING,
LINE_ITEM_IDENT TYPE STRING,
DOCUMENT_NUM TYPE STRING,
DOCUMENT_LINE_ITEM TYPE STRING,
TOTAL_NET_AMOUNT TYPE STRING,
TOTAL_TAX_AMOUNT TYPE STRING,
ITEM_AMOUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDKR_S_ASSET_TAX_DATA_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_IDKR_S_ASSET_TAX_DATA_STR-COMPANY_CODE sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-ASSET_CATEGORY sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-ASSET_CLASS sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-MAIN_ASSET_NUMBER sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-SUB_ASSET_NUMBER sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-FISCAL_YEAR sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-ASSET_QUANTITY sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-TAX_ITEM_GROUP sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-LINE_ITEM_IDENT sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-DOCUMENT_NUM sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-DOCUMENT_LINE_ITEM sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-TOTAL_NET_AMOUNT sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-TOTAL_TAX_AMOUNT sy-vline 
WA_IDKR_S_ASSET_TAX_DATA_STR-ITEM_AMOUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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