ABAP Select data from SAP table FIRU_S_INVOICE_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FIRU_S_INVOICE_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 FIRU_S_INVOICE_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 FIRU_S_INVOICE_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_FIRU_S_INVOICE_ITEM TYPE STANDARD TABLE OF FIRU_S_INVOICE_ITEM,
      WA_FIRU_S_INVOICE_ITEM TYPE FIRU_S_INVOICE_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: <FIRU_S_INVOICE_ITEM> TYPE FIRU_S_INVOICE_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIRU_S_INVOICE_ITEM
*  INTO TABLE @DATA(IT_FIRU_S_INVOICE_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_FIRU_S_INVOICE_ITEM INDEX 1 INTO DATA(WA_FIRU_S_INVOICE_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIRU_S_INVOICE_ITEM>-BILLING_DOCUMENT = 1.
<FIRU_S_INVOICE_ITEM>-BILLING_DOCUMENT_ITEM = 1.
<FIRU_S_INVOICE_ITEM>-BUKRS = 1.
<FIRU_S_INVOICE_ITEM>-BELNR = 1.
<FIRU_S_INVOICE_ITEM>-GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIRU_S_INVOICE_ITEM-BUZEI, sy-vline,
  WA_FIRU_S_INVOICE_ITEM-MATNR, sy-vline,
  WA_FIRU_S_INVOICE_ITEM-ANLN1, sy-vline,
  WA_FIRU_S_INVOICE_ITEM-ANLN2, sy-vline,
  WA_FIRU_S_INVOICE_ITEM-ITEM_NAME, sy-vline,
  WA_FIRU_S_INVOICE_ITEM-UNIT_CODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIRU_S_INVOICE_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_FIRU_S_INVOICE_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_FIRU_S_INVOICE_ITEM INTO WA_FIRU_S_INVOICE_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 ALPHA, internal->external for field BILLING_DOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FIRU_S_INVOICE_ITEM-BILLING_DOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIRU_S_INVOICE_ITEM-BILLING_DOCUMENT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_FIRU_S_INVOICE_ITEM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIRU_S_INVOICE_ITEM-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FIRU_S_INVOICE_ITEM-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIRU_S_INVOICE_ITEM-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FIRU_S_INVOICE_ITEM-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIRU_S_INVOICE_ITEM-ANLN2.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field PO_ITEM_NUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FIRU_S_INVOICE_ITEM-PO_ITEM_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIRU_S_INVOICE_ITEM-PO_ITEM_NUM.
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_FIRU_S_INVOICE_ITEM_STR, 
BILLING_DOCUMENT TYPE STRING,
BILLING_DOCUMENT_ITEM TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
MATNR TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
ITEM_NAME TYPE STRING,
UNIT_CODE TYPE STRING,
UNIT_NAME TYPE STRING,
QUANTITY TYPE STRING,
PRICE TYPE STRING,
NET_AMOUNT TYPE STRING,
EXC_AMOUNT TYPE STRING,
VAT_RATE TYPE STRING,
WITHOUT_VAT TYPE STRING,
VAT_AMOUNT TYPE STRING,
TOTAL_AMOUNT TYPE STRING,
COUNTRY_CODE TYPE STRING,
COUNTRY_NAME TYPE STRING,
CCD_NUMBER TYPE STRING,
SALES_UNIT TYPE STRING,
DOC_CURRENCY TYPE STRING,
CUSTOMER_PO_NUM TYPE STRING,
CUSTOMER_PO_DATE TYPE STRING,
PO_ITEM_NUM TYPE STRING,
CUSTOMER_MAT_NUM TYPE STRING,
WERKS TYPE STRING,
MATNR_TYPE_CODE TYPE STRING,
COUNTRY_CODES TYPE STRING,
COUNTRY_NAMES TYPE STRING,
CCD_RNPT_DATA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIRU_S_INVOICE_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_FIRU_S_INVOICE_ITEM_STR-BILLING_DOCUMENT sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-BILLING_DOCUMENT_ITEM sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-BUKRS sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-BELNR sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-GJAHR sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-BUZEI sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-MATNR sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-ANLN1 sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-ANLN2 sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-ITEM_NAME sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-UNIT_CODE sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-UNIT_NAME sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-QUANTITY sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-PRICE sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-NET_AMOUNT sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-EXC_AMOUNT sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-VAT_RATE sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-WITHOUT_VAT sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-VAT_AMOUNT sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-TOTAL_AMOUNT sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-COUNTRY_CODE sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-COUNTRY_NAME sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-CCD_NUMBER sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-SALES_UNIT sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-DOC_CURRENCY sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-CUSTOMER_PO_NUM sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-CUSTOMER_PO_DATE sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-PO_ITEM_NUM sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-CUSTOMER_MAT_NUM sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-WERKS sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-MATNR_TYPE_CODE sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-COUNTRY_CODES sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-COUNTRY_NAMES sy-vline 
WA_FIRU_S_INVOICE_ITEM_STR-CCD_RNPT_DATA sy-vline      INTO ld_text SEPARATED BY SPACE.

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