ABAP Select data from SAP table INVOICE_LINE_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP INVOICE_LINE_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 INVOICE_LINE_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 INVOICE_LINE_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_INVOICE_LINE_ITEM TYPE STANDARD TABLE OF INVOICE_LINE_ITEM,
      WA_INVOICE_LINE_ITEM TYPE INVOICE_LINE_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: <INVOICE_LINE_ITEM> TYPE INVOICE_LINE_ITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM INVOICE_LINE_ITEM
*  INTO TABLE @DATA(IT_INVOICE_LINE_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_INVOICE_LINE_ITEM INDEX 1 INTO DATA(WA_INVOICE_LINE_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<INVOICE_LINE_ITEM>-WA_INVOICE = 1.
<INVOICE_LINE_ITEM>-BUKRS = 1.
<INVOICE_LINE_ITEM>-BELNR = 1.
<INVOICE_LINE_ITEM>-GJAHR = 1.
<INVOICE_LINE_ITEM>-KUNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_INVOICE_LINE_ITEM-NAME1, sy-vline,
  WA_INVOICE_LINE_ITEM-NAME2, sy-vline,
  WA_INVOICE_LINE_ITEM-NAME3, sy-vline,
  WA_INVOICE_LINE_ITEM-NAME4, sy-vline,
  WA_INVOICE_LINE_ITEM-CITY, sy-vline,
  WA_INVOICE_LINE_ITEM-ZIP_CODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_INVOICE_LINE_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_INVOICE_LINE_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_INVOICE_LINE_ITEM INTO WA_INVOICE_LINE_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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_INVOICE_LINE_ITEM-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INVOICE_LINE_ITEM-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field BILL_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_INVOICE_LINE_ITEM-BILL_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_INVOICE_LINE_ITEM-BILL_DOC.
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_INVOICE_LINE_ITEM_STR, 
WA_INVOICE TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
KUNNR TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
CITY TYPE STRING,
ZIP_CODE TYPE STRING,
REGION TYPE STRING,
STREET TYPE STRING,
PHONE TYPE STRING,
PO_BOX TYPE STRING,
AMOUNT TYPE STRING,
AMOUNT_LOC TYPE STRING,
OPEN_AMOUNT TYPE STRING,
OPEN_AMOUNT_LOC TYPE STRING,
CURRENCY TYPE STRING,
CURRENCY_LOC TYPE STRING,
DOC_TYPE TYPE STRING,
DOC_TEXT TYPE STRING,
ITEM_TEXT TYPE STRING,
REFERENCE TYPE STRING,
DOC_DATE TYPE STRING,
POSTING_DATE TYPE STRING,
BASE_DATE TYPE STRING,
PAYTERM TYPE STRING,
CASH_DISC_1 TYPE STRING,
CASH_DISC_2 TYPE STRING,
NET_DAYS TYPE STRING,
NET_DUE_DATE TYPE STRING,
CASH_DISC_PER1 TYPE STRING,
CASH_DISC_PER2 TYPE STRING,
SKFBT TYPE STRING,
WSKTO TYPE STRING,
POST_KEY TYPE STRING,
DUN_KEY TYPE STRING,
DUN_BLOCK TYPE STRING,
DUN_DATE TYPE STRING,
DUN_LEVEL TYPE STRING,
BILL_DOC TYPE STRING,
ACC_AT_CUST TYPE STRING,
USER_AT_CUST TYPE STRING,
CLERK_FAX TYPE STRING,
CLERK_PHONE TYPE STRING,
INTERNET_ADDR TYPE STRING,
CLERK_ID TYPE STRING,
CLEAR_NAME TYPE STRING,
SAP_NAME TYPE STRING,
T_AGING TYPE STRING,
T_CUST_BANK TYPE STRING,
T_REF_ITEMS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_INVOICE_LINE_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_INVOICE_LINE_ITEM_STR-WA_INVOICE sy-vline 
WA_INVOICE_LINE_ITEM_STR-BUKRS sy-vline 
WA_INVOICE_LINE_ITEM_STR-BELNR sy-vline 
WA_INVOICE_LINE_ITEM_STR-GJAHR sy-vline 
WA_INVOICE_LINE_ITEM_STR-KUNNR sy-vline 
WA_INVOICE_LINE_ITEM_STR-NAME1 sy-vline 
WA_INVOICE_LINE_ITEM_STR-NAME2 sy-vline 
WA_INVOICE_LINE_ITEM_STR-NAME3 sy-vline 
WA_INVOICE_LINE_ITEM_STR-NAME4 sy-vline 
WA_INVOICE_LINE_ITEM_STR-CITY sy-vline 
WA_INVOICE_LINE_ITEM_STR-ZIP_CODE sy-vline 
WA_INVOICE_LINE_ITEM_STR-REGION sy-vline 
WA_INVOICE_LINE_ITEM_STR-STREET sy-vline 
WA_INVOICE_LINE_ITEM_STR-PHONE sy-vline 
WA_INVOICE_LINE_ITEM_STR-PO_BOX sy-vline 
WA_INVOICE_LINE_ITEM_STR-AMOUNT sy-vline 
WA_INVOICE_LINE_ITEM_STR-AMOUNT_LOC sy-vline 
WA_INVOICE_LINE_ITEM_STR-OPEN_AMOUNT sy-vline 
WA_INVOICE_LINE_ITEM_STR-OPEN_AMOUNT_LOC sy-vline 
WA_INVOICE_LINE_ITEM_STR-CURRENCY sy-vline 
WA_INVOICE_LINE_ITEM_STR-CURRENCY_LOC sy-vline 
WA_INVOICE_LINE_ITEM_STR-DOC_TYPE sy-vline 
WA_INVOICE_LINE_ITEM_STR-DOC_TEXT sy-vline 
WA_INVOICE_LINE_ITEM_STR-ITEM_TEXT sy-vline 
WA_INVOICE_LINE_ITEM_STR-REFERENCE sy-vline 
WA_INVOICE_LINE_ITEM_STR-DOC_DATE sy-vline 
WA_INVOICE_LINE_ITEM_STR-POSTING_DATE sy-vline 
WA_INVOICE_LINE_ITEM_STR-BASE_DATE sy-vline 
WA_INVOICE_LINE_ITEM_STR-PAYTERM sy-vline 
WA_INVOICE_LINE_ITEM_STR-CASH_DISC_1 sy-vline 
WA_INVOICE_LINE_ITEM_STR-CASH_DISC_2 sy-vline 
WA_INVOICE_LINE_ITEM_STR-NET_DAYS sy-vline 
WA_INVOICE_LINE_ITEM_STR-NET_DUE_DATE sy-vline 
WA_INVOICE_LINE_ITEM_STR-CASH_DISC_PER1 sy-vline 
WA_INVOICE_LINE_ITEM_STR-CASH_DISC_PER2 sy-vline 
WA_INVOICE_LINE_ITEM_STR-SKFBT sy-vline 
WA_INVOICE_LINE_ITEM_STR-WSKTO sy-vline 
WA_INVOICE_LINE_ITEM_STR-POST_KEY sy-vline 
WA_INVOICE_LINE_ITEM_STR-DUN_KEY sy-vline 
WA_INVOICE_LINE_ITEM_STR-DUN_BLOCK sy-vline 
WA_INVOICE_LINE_ITEM_STR-DUN_DATE sy-vline 
WA_INVOICE_LINE_ITEM_STR-DUN_LEVEL sy-vline 
WA_INVOICE_LINE_ITEM_STR-BILL_DOC sy-vline 
WA_INVOICE_LINE_ITEM_STR-ACC_AT_CUST sy-vline 
WA_INVOICE_LINE_ITEM_STR-USER_AT_CUST sy-vline 
WA_INVOICE_LINE_ITEM_STR-CLERK_FAX sy-vline 
WA_INVOICE_LINE_ITEM_STR-CLERK_PHONE sy-vline 
WA_INVOICE_LINE_ITEM_STR-INTERNET_ADDR sy-vline 
WA_INVOICE_LINE_ITEM_STR-CLERK_ID sy-vline 
WA_INVOICE_LINE_ITEM_STR-CLEAR_NAME sy-vline 
WA_INVOICE_LINE_ITEM_STR-SAP_NAME sy-vline 
WA_INVOICE_LINE_ITEM_STR-T_AGING sy-vline 
WA_INVOICE_LINE_ITEM_STR-T_CUST_BANK sy-vline 
WA_INVOICE_LINE_ITEM_STR-T_REF_ITEMS sy-vline      INTO ld_text SEPARATED BY SPACE.

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