ABAP Select data from SAP table ISAFTSMITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISAFTSMITEM
*  INTO TABLE @DATA(IT_ISAFTSMITEM2).
*--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_ISAFTSMITEM INDEX 1 INTO DATA(WA_ISAFTSMITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISAFTSMITEM>-MANDT = 1.
<ISAFTSMITEM>-SETTLMTMGMTDOC = 1.
<ISAFTSMITEM>-SETTLMTMGMTDOCITEM = 1.
<ISAFTSMITEM>-SUPLRSETTLMTCOMPANYCODE = 1.
<ISAFTSMITEM>-PRODUCT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISAFTSMITEM-SETTLMTQUANTITY, sy-vline,
  WA_ISAFTSMITEM-SETTLMTQUANTITYUNIT, sy-vline,
  WA_ISAFTSMITEM-NETPRICEAMOUNT, sy-vline,
  WA_ISAFTSMITEM-SETTLMTMGMTDOCITEMTEXT, sy-vline,
  WA_ISAFTSMITEM-SUPPLIERITEMNETAMOUNT, sy-vline,
  WA_ISAFTSMITEM-SETTLMTITEMRELTDCNDNCONTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISAFTSMITEM 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_ISAFTSMITEM 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_ISAFTSMITEM INTO WA_ISAFTSMITEM.


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

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

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

*Conversion exit ALPHA, internal->external for field SETTLMTITEMRELTDCNDNCONTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISAFTSMITEM-SETTLMTITEMRELTDCNDNCONTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISAFTSMITEM-SETTLMTITEMRELTDCNDNCONTR.
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_ISAFTSMITEM_STR, 
MANDT TYPE STRING,
SETTLMTMGMTDOC TYPE STRING,
SETTLMTMGMTDOCITEM TYPE STRING,
SUPLRSETTLMTCOMPANYCODE TYPE STRING,
PRODUCT TYPE STRING,
SETTLMTQUANTITY TYPE STRING,
SETTLMTQUANTITYUNIT TYPE STRING,
NETPRICEAMOUNT TYPE STRING,
SETTLMTMGMTDOCITEMTEXT TYPE STRING,
SUPPLIERITEMNETAMOUNT TYPE STRING,
SETTLMTITEMRELTDCNDNCONTR TYPE STRING,
SETTLMTITEMACTIVITYREASON TYPE STRING,
CUSTOMERTAXCODE TYPE STRING,
SETTLMTDOCCURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISAFTSMITEM_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_ISAFTSMITEM_STR-MANDT sy-vline 
WA_ISAFTSMITEM_STR-SETTLMTMGMTDOC sy-vline 
WA_ISAFTSMITEM_STR-SETTLMTMGMTDOCITEM sy-vline 
WA_ISAFTSMITEM_STR-SUPLRSETTLMTCOMPANYCODE sy-vline 
WA_ISAFTSMITEM_STR-PRODUCT sy-vline 
WA_ISAFTSMITEM_STR-SETTLMTQUANTITY sy-vline 
WA_ISAFTSMITEM_STR-SETTLMTQUANTITYUNIT sy-vline 
WA_ISAFTSMITEM_STR-NETPRICEAMOUNT sy-vline 
WA_ISAFTSMITEM_STR-SETTLMTMGMTDOCITEMTEXT sy-vline 
WA_ISAFTSMITEM_STR-SUPPLIERITEMNETAMOUNT sy-vline 
WA_ISAFTSMITEM_STR-SETTLMTITEMRELTDCNDNCONTR sy-vline 
WA_ISAFTSMITEM_STR-SETTLMTITEMACTIVITYREASON sy-vline 
WA_ISAFTSMITEM_STR-CUSTOMERTAXCODE sy-vline 
WA_ISAFTSMITEM_STR-SETTLMTDOCCURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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