ABAP Select data from SAP table FITR_INVENTORY_LINEITEM_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FITR_INVENTORY_LINEITEM_S
*  INTO TABLE @DATA(IT_FITR_INVENTORY_LINEITEM_S2).
*--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_FITR_INVENTORY_LINEITEM_S INDEX 1 INTO DATA(WA_FITR_INVENTORY_LINEITEM_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FITR_INVENTORY_LINEITEM_S>-COMPANYCODE = 1.
<FITR_INVENTORY_LINEITEM_S>-GLACCOUNT = 1.
<FITR_INVENTORY_LINEITEM_S>-TEXT = 1.
<FITR_INVENTORY_LINEITEM_S>-BALANCE = 1.
<FITR_INVENTORY_LINEITEM_S>-CURRENCY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FITR_INVENTORY_LINEITEM_S-RECONCILIATIONID, sy-vline,
  WA_FITR_INVENTORY_LINEITEM_S-CUSTOMER, sy-vline,
  WA_FITR_INVENTORY_LINEITEM_S-VENDOR, sy-vline,
  WA_FITR_INVENTORY_LINEITEM_S-CHECKNUMBER, sy-vline,
  WA_FITR_INVENTORY_LINEITEM_S-ASSET, sy-vline,
  WA_FITR_INVENTORY_LINEITEM_S-ASSETSUBUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FITR_INVENTORY_LINEITEM_S 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_FITR_INVENTORY_LINEITEM_S 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_FITR_INVENTORY_LINEITEM_S INTO WA_FITR_INVENTORY_LINEITEM_S.


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

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

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

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

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

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

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

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

*Conversion exit ABPSP, internal->external for field WBSELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_FITR_INVENTORY_LINEITEM_S-WBSELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FITR_INVENTORY_LINEITEM_S-WBSELEMENT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ACCOUNTINGDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FITR_INVENTORY_LINEITEM_S-ACCOUNTINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FITR_INVENTORY_LINEITEM_S-ACCOUNTINGDOCUMENT.
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_FITR_INVENTORY_LINEITEM_S_STR, 
COMPANYCODE TYPE STRING,
GLACCOUNT TYPE STRING,
TEXT TYPE STRING,
BALANCE TYPE STRING,
CURRENCY TYPE STRING,
RECONCILIATIONID TYPE STRING,
CUSTOMER TYPE STRING,
VENDOR TYPE STRING,
CHECKNUMBER TYPE STRING,
ASSET TYPE STRING,
ASSETSUBUMBER TYPE STRING,
MATERIAL TYPE STRING,
VALUATIONAREA TYPE STRING,
SDDOCUMENT TYPE STRING,
SDDOCUMENTITEM TYPE STRING,
WBSELEMENT TYPE STRING,
TOTALSTOCK TYPE STRING,
DEBITAMOUNT TYPE STRING,
CREDITAMOUNT TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FITR_INVENTORY_LINEITEM_S_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_FITR_INVENTORY_LINEITEM_S_STR-COMPANYCODE sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-GLACCOUNT sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-TEXT sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-BALANCE sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-CURRENCY sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-RECONCILIATIONID sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-CUSTOMER sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-VENDOR sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-CHECKNUMBER sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-ASSET sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-ASSETSUBUMBER sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-MATERIAL sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-VALUATIONAREA sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-SDDOCUMENT sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-SDDOCUMENTITEM sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-WBSELEMENT sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-TOTALSTOCK sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-DEBITAMOUNT sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-CREDITAMOUNT sy-vline 
WA_FITR_INVENTORY_LINEITEM_S_STR-ACCOUNTINGDOCUMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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