ABAP Select data from SAP table WLF_S_FDP_SSDOC_ITM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WLF_S_FDP_SSDOC_ITM
*  INTO TABLE @DATA(IT_WLF_S_FDP_SSDOC_ITM2).
*--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_WLF_S_FDP_SSDOC_ITM INDEX 1 INTO DATA(WA_WLF_S_FDP_SSDOC_ITM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WLF_S_FDP_SSDOC_ITM>-SUPLRSETTLMT = 1.
<WLF_S_FDP_SSDOC_ITM>-SUPLRSETTLMTITEM = 1.
<WLF_S_FDP_SSDOC_ITM>-SUPLRSETTLMTCURRENCY = 1.
<WLF_S_FDP_SSDOC_ITM>-PRODUCT = 1.
<WLF_S_FDP_SSDOC_ITM>-PRODUCTNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WLF_S_FDP_SSDOC_ITM-PRODUCTGROUP, sy-vline,
  WA_WLF_S_FDP_SSDOC_ITM-PRODUCTGROUPNAME, sy-vline,
  WA_WLF_S_FDP_SSDOC_ITM-PLANT, sy-vline,
  WA_WLF_S_FDP_SSDOC_ITM-PLANTNAME, sy-vline,
  WA_WLF_S_FDP_SSDOC_ITM-SETTLMTQUANTITY, sy-vline,
  WA_WLF_S_FDP_SSDOC_ITM-SETTLMTQUANTITYUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WLF_S_FDP_SSDOC_ITM 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_WLF_S_FDP_SSDOC_ITM 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_WLF_S_FDP_SSDOC_ITM INTO WA_WLF_S_FDP_SSDOC_ITM.


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

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

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

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

*Conversion exit ALPHA, internal->external for field SETTLMTITEMRELTDCNDNCONTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_WLF_S_FDP_SSDOC_ITM-SETTLMTITEMRELTDCNDNCONTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WLF_S_FDP_SSDOC_ITM-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_WLF_S_FDP_SSDOC_ITM_STR, 
SUPLRSETTLMT TYPE STRING,
SUPLRSETTLMTITEM TYPE STRING,
SUPLRSETTLMTCURRENCY TYPE STRING,
PRODUCT TYPE STRING,
PRODUCTNAME TYPE STRING,
PRODUCTGROUP TYPE STRING,
PRODUCTGROUPNAME TYPE STRING,
PLANT TYPE STRING,
PLANTNAME TYPE STRING,
SETTLMTQUANTITY TYPE STRING,
SETTLMTQUANTITYUNIT TYPE STRING,
SETTLMTQUANTITYUNITTECHNAME TYPE STRING,
NETPRICEAMOUNT TYPE STRING,
NETPRICEQUANTITY TYPE STRING,
NETPRICEQUANTITYUNIT TYPE STRING,
NETPRICEQUANTITYUNITTECHNAME TYPE STRING,
SUPPLIERITEMGROSSAMOUNT TYPE STRING,
SUPPLIERITEMNETAMOUNT TYPE STRING,
SUPPLIERREBATEBASISAMOUNT TYPE STRING,
SUPPLIEREFFECTIVEITEMAMOUNT TYPE STRING,
SUPLRITMELIGIBLEAMTFORCSHDISC TYPE STRING,
SUPPLIERITEMTAXAMOUNT TYPE STRING,
SUPLRSETTLMTITEMTEXT TYPE STRING,
SUPPLIERPRODUCTID TYPE STRING,
SETTLMTITEMRELTDCNDNCONTR TYPE STRING,
DUMMY_WBRP_INCL_EEW_PS TYPE STRING,
DUMMY_WBRP_INCL_EEW_TR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WLF_S_FDP_SSDOC_ITM_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_WLF_S_FDP_SSDOC_ITM_STR-SUPLRSETTLMT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPLRSETTLMTITEM sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPLRSETTLMTCURRENCY sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-PRODUCT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-PRODUCTNAME sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-PRODUCTGROUP sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-PRODUCTGROUPNAME sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-PLANT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-PLANTNAME sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SETTLMTQUANTITY sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SETTLMTQUANTITYUNIT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SETTLMTQUANTITYUNITTECHNAME sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-NETPRICEAMOUNT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-NETPRICEQUANTITY sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-NETPRICEQUANTITYUNIT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-NETPRICEQUANTITYUNITTECHNAME sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPPLIERITEMGROSSAMOUNT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPPLIERITEMNETAMOUNT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPPLIERREBATEBASISAMOUNT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPPLIEREFFECTIVEITEMAMOUNT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPLRITMELIGIBLEAMTFORCSHDISC sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPPLIERITEMTAXAMOUNT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPLRSETTLMTITEMTEXT sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SUPPLIERPRODUCTID sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-SETTLMTITEMRELTDCNDNCONTR sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-DUMMY_WBRP_INCL_EEW_PS sy-vline 
WA_WLF_S_FDP_SSDOC_ITM_STR-DUMMY_WBRP_INCL_EEW_TR sy-vline      INTO ld_text SEPARATED BY SPACE.

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