ABAP Select data from SAP table FIFAFAE_S_PURCHASE_ITEM_LBL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIFAFAE_S_PURCHASE_ITEM_LBL
*  INTO TABLE @DATA(IT_FIFAFAE_S_PURCHASE_ITEM_LBL2).
*--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_FIFAFAE_S_PURCHASE_ITEM_LBL INDEX 1 INTO DATA(WA_FIFAFAE_S_PURCHASE_ITEM_LBL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIFAFAE_S_PURCHASE_ITEM_LBL>-SUPPLIERNAME = 1.
<FIFAFAE_S_PURCHASE_ITEM_LBL>-SUPPLIERCOUNTRY = 1.
<FIFAFAE_S_PURCHASE_ITEM_LBL>-SUPPLIERTRN = 1.
<FIFAFAE_S_PURCHASE_ITEM_LBL>-INVOICEDATEL = 1.
<FIFAFAE_S_PURCHASE_ITEM_LBL>-INVOICENO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIFAFAE_S_PURCHASE_ITEM_LBL-PERMITNO, sy-vline,
  WA_FIFAFAE_S_PURCHASE_ITEM_LBL-TRANSACTIONID, sy-vline,
  WA_FIFAFAE_S_PURCHASE_ITEM_LBL-LINENOP, sy-vline,
  WA_FIFAFAE_S_PURCHASE_ITEM_LBL-PRODUCTDESCRIPTION, sy-vline,
  WA_FIFAFAE_S_PURCHASE_ITEM_LBL-PURCHASEVALUEAED, sy-vline,
  WA_FIFAFAE_S_PURCHASE_ITEM_LBL-VATVALUEAED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIFAFAE_S_PURCHASE_ITEM_LBL 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_FIFAFAE_S_PURCHASE_ITEM_LBL 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_FIFAFAE_S_PURCHASE_ITEM_LBL INTO WA_FIFAFAE_S_PURCHASE_ITEM_LBL.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FIFAFAE_S_PURCHASE_ITEM_LBL_STR, 
SUPPLIERNAME TYPE STRING,
SUPPLIERCOUNTRY TYPE STRING,
SUPPLIERTRN TYPE STRING,
INVOICEDATEL TYPE STRING,
INVOICENO TYPE STRING,
PERMITNO TYPE STRING,
TRANSACTIONID TYPE STRING,
LINENOP TYPE STRING,
PRODUCTDESCRIPTION TYPE STRING,
PURCHASEVALUEAED TYPE STRING,
VATVALUEAED TYPE STRING,
TAXCODE TYPE STRING,
FCYCODE TYPE STRING,
PURCHASEFCY TYPE STRING,
VATFCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIFAFAE_S_PURCHASE_ITEM_LBL_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_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-SUPPLIERNAME sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-SUPPLIERCOUNTRY sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-SUPPLIERTRN sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-INVOICEDATEL sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-INVOICENO sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-PERMITNO sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-TRANSACTIONID sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-LINENOP sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-PRODUCTDESCRIPTION sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-PURCHASEVALUEAED sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-VATVALUEAED sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-TAXCODE sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-FCYCODE sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-PURCHASEFCY sy-vline 
WA_FIFAFAE_S_PURCHASE_ITEM_LBL_STR-VATFCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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