ABAP Select data from SAP table IWLFSMTDCCPREL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWLFSMTDCCPREL
*  INTO TABLE @DATA(IT_IWLFSMTDCCPREL2).
*--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_IWLFSMTDCCPREL INDEX 1 INTO DATA(WA_IWLFSMTDCCPREL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWLFSMTDCCPREL>-MANDT = 1.
<IWLFSMTDCCPREL>-SETTLMTDOC = 1.
<IWLFSMTDCCPREL>-PRICINGPROCEDURESTEP = 1.
<IWLFSMTDCCPREL>-PRICINGPROCEDURECOUNTER = 1.
<IWLFSMTDCCPREL>-CONDITIONAPPLICATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWLFSMTDCCPREL-CONDITIONTYPE, sy-vline,
  WA_IWLFSMTDCCPREL-PRICINGDATETIME, sy-vline,
  WA_IWLFSMTDCCPREL-PRICECONDITIONDETERMINATIONDTE, sy-vline,
  WA_IWLFSMTDCCPREL-CONDITIONCALCULATIONTYPE, sy-vline,
  WA_IWLFSMTDCCPREL-CONDITIONBASEVALUE, sy-vline,
  WA_IWLFSMTDCCPREL-CONDITIONRATEVALUE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWLFSMTDCCPREL 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_IWLFSMTDCCPREL 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_IWLFSMTDCCPREL INTO WA_IWLFSMTDCCPREL.


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

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

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

*Conversion exit CUNIT, internal->external for field CONDITIONRATERATIOUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IWLFSMTDCCPREL-CONDITIONRATERATIOUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWLFSMTDCCPREL-CONDITIONRATERATIOUNIT.
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_IWLFSMTDCCPREL_STR, 
MANDT TYPE STRING,
SETTLMTDOC TYPE STRING,
PRICINGPROCEDURESTEP TYPE STRING,
PRICINGPROCEDURECOUNTER TYPE STRING,
CONDITIONAPPLICATION TYPE STRING,
CONDITIONTYPE TYPE STRING,
PRICINGDATETIME TYPE STRING,
PRICECONDITIONDETERMINATIONDTE TYPE STRING,
CONDITIONCALCULATIONTYPE TYPE STRING,
CONDITIONBASEVALUE TYPE STRING,
CONDITIONRATEVALUE TYPE STRING,
CONDITIONCURRENCY TYPE STRING,
CONDITIONQUANTITY TYPE STRING,
CONDITIONQUANTITYUNIT TYPE STRING,
CONDITIONCATEGORY TYPE STRING,
CONDITIONISFORSTATISTICS TYPE STRING,
PRICINGSCALETYPE TYPE STRING,
ISRELEVANTFORACCRUAL TYPE STRING,
CNDNISRELEVANTFORINVOICELIST TYPE STRING,
CONDITIONORIGIN TYPE STRING,
ISGROUPCONDITION TYPE STRING,
CONDITIONRECORD TYPE STRING,
CONDITIONSEQUENTIALNUMBER TYPE STRING,
TAXCODE TYPE STRING,
WITHHOLDINGTAXCODE TYPE STRING,
CNDNROUNDINGOFFDIFFAMOUNT TYPE STRING,
CONDITIONAMOUNT TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
CONDITIONCONTROL TYPE STRING,
CONDITIONINACTIVEREASON TYPE STRING,
CONDITIONCLASS TYPE STRING,
PRCGPROCEDURECOUNTERFORHEADER TYPE STRING,
FACTORFORCONDITIONBASISVALUE TYPE STRING,
STRUCTURECONDITION TYPE STRING,
PERIODFACTORFORCNDNBASISVALUE TYPE STRING,
PRICINGSCALEBASIS TYPE STRING,
CONDITIONSCALEBASISVALUE TYPE STRING,
CONDITIONSCALEBASISUNIT TYPE STRING,
CONDITIONSCALEBASISCURRENCY TYPE STRING,
CNDNISRELEVANTFORINTCOBILLING TYPE STRING,
CONDITIONISMANUALLYCHANGED TYPE STRING,
CONDITIONISFORCONFIGURATION TYPE STRING,
VARIANTCONDITION TYPE STRING,
CONDITIONRATEAMOUNT TYPE STRING,
CONDITIONBASEAMOUNT TYPE STRING,
CONDITIONBASEQUANTITY TYPE STRING,
CONDITIONRATERATIO TYPE STRING,
CONDITIONRATERATIOUNIT TYPE STRING,
CONDITIONSCALEBASEAMOUNT TYPE STRING,
CONDITIONSCALEBASEQUANTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWLFSMTDCCPREL_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_IWLFSMTDCCPREL_STR-MANDT sy-vline 
WA_IWLFSMTDCCPREL_STR-SETTLMTDOC sy-vline 
WA_IWLFSMTDCCPREL_STR-PRICINGPROCEDURESTEP sy-vline 
WA_IWLFSMTDCCPREL_STR-PRICINGPROCEDURECOUNTER sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONAPPLICATION sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONTYPE sy-vline 
WA_IWLFSMTDCCPREL_STR-PRICINGDATETIME sy-vline 
WA_IWLFSMTDCCPREL_STR-PRICECONDITIONDETERMINATIONDTE sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONCALCULATIONTYPE sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONBASEVALUE sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONRATEVALUE sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONCURRENCY sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONQUANTITY sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONQUANTITYUNIT sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONCATEGORY sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONISFORSTATISTICS sy-vline 
WA_IWLFSMTDCCPREL_STR-PRICINGSCALETYPE sy-vline 
WA_IWLFSMTDCCPREL_STR-ISRELEVANTFORACCRUAL sy-vline 
WA_IWLFSMTDCCPREL_STR-CNDNISRELEVANTFORINVOICELIST sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONORIGIN sy-vline 
WA_IWLFSMTDCCPREL_STR-ISGROUPCONDITION sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONRECORD sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONSEQUENTIALNUMBER sy-vline 
WA_IWLFSMTDCCPREL_STR-TAXCODE sy-vline 
WA_IWLFSMTDCCPREL_STR-WITHHOLDINGTAXCODE sy-vline 
WA_IWLFSMTDCCPREL_STR-CNDNROUNDINGOFFDIFFAMOUNT sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONAMOUNT sy-vline 
WA_IWLFSMTDCCPREL_STR-TRANSACTIONCURRENCY sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONCONTROL sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONINACTIVEREASON sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONCLASS sy-vline 
WA_IWLFSMTDCCPREL_STR-PRCGPROCEDURECOUNTERFORHEADER sy-vline 
WA_IWLFSMTDCCPREL_STR-FACTORFORCONDITIONBASISVALUE sy-vline 
WA_IWLFSMTDCCPREL_STR-STRUCTURECONDITION sy-vline 
WA_IWLFSMTDCCPREL_STR-PERIODFACTORFORCNDNBASISVALUE sy-vline 
WA_IWLFSMTDCCPREL_STR-PRICINGSCALEBASIS sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONSCALEBASISVALUE sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONSCALEBASISUNIT sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONSCALEBASISCURRENCY sy-vline 
WA_IWLFSMTDCCPREL_STR-CNDNISRELEVANTFORINTCOBILLING sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONISMANUALLYCHANGED sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONISFORCONFIGURATION sy-vline 
WA_IWLFSMTDCCPREL_STR-VARIANTCONDITION sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONRATEAMOUNT sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONBASEAMOUNT sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONBASEQUANTITY sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONRATERATIO sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONRATERATIOUNIT sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONSCALEBASEAMOUNT sy-vline 
WA_IWLFSMTDCCPREL_STR-CONDITIONSCALEBASEQUANTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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