ABAP Select data from SAP table FKKCOLLITEM_GFN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKCOLLITEM_GFN
*  INTO TABLE @DATA(IT_FKKCOLLITEM_GFN2).
*--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_FKKCOLLITEM_GFN INDEX 1 INTO DATA(WA_FKKCOLLITEM_GFN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKCOLLITEM_GFN>-CACOLLECTIONAGENCY = 1.
<FKKCOLLITEM_GFN>-CACOLLECTIONITEM = 1.
<FKKCOLLITEM_GFN>-CACOLLITEMGROUPINGLEVEL = 1.
<FKKCOLLITEM_GFN>-CACOLLITEMSQNCNUMBER = 1.
<FKKCOLLITEM_GFN>-BUSINESSPARTNER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKCOLLITEM_GFN-CAPARENTCOLLECTIONITEM, sy-vline,
  WA_FKKCOLLITEM_GFN-CAPARENTCOLLITEMGROUPINGLEVEL, sy-vline,
  WA_FKKCOLLITEM_GFN-TRANSACTIONCURRENCY, sy-vline,
  WA_FKKCOLLITEM_GFN-CASUBMITTEDAMOUNTINTRANSCRCY, sy-vline,
  WA_FKKCOLLITEM_GFN-CADATEOFTRANSFERTOCOLLAGCY, sy-vline,
  WA_FKKCOLLITEM_GFN-CACALLBACKAMOUNTINTRANSCRCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKCOLLITEM_GFN 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_FKKCOLLITEM_GFN 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_FKKCOLLITEM_GFN INTO WA_FKKCOLLITEM_GFN.


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

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

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

*Conversion exit ALPHA, internal->external for field CAPARENTCOLLITEMGROUPINGLEVEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCOLLITEM_GFN-CAPARENTCOLLITEMGROUPINGLEVEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCOLLITEM_GFN-CAPARENTCOLLITEMGROUPINGLEVEL.
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_FKKCOLLITEM_GFN_STR, 
CACOLLECTIONAGENCY TYPE STRING,
CACOLLECTIONITEM TYPE STRING,
CACOLLITEMGROUPINGLEVEL TYPE STRING,
CACOLLITEMSQNCNUMBER TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CAPARENTCOLLECTIONITEM TYPE STRING,
CAPARENTCOLLITEMGROUPINGLEVEL TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
CASUBMITTEDAMOUNTINTRANSCRCY TYPE STRING,
CADATEOFTRANSFERTOCOLLAGCY TYPE STRING,
CACALLBACKAMOUNTINTRANSCRCY TYPE STRING,
RECEIVABLECALLBACKDATE TYPE STRING,
CACOLLECTIONITEMCATEGORY TYPE STRING,
CACOLLECTIONITEMSTATUS TYPE STRING,
VALUEDATE TYPE STRING,
CANONCOLLECTABLEAMOUNT TYPE STRING,
CACOLLAGCYINTRSTRECEIVABLEAMT TYPE STRING,
CACOLLAGCYCHARGERECEIVABLEAMT TYPE STRING,
CACOLLECTIONITEMTEXT TYPE STRING,
CACOLLITEMPROCESSINGSTATUS TYPE STRING,
CAMASSRUNDATE TYPE STRING,
CAMASSRUNID TYPE STRING,
COLLECTIONITEMSENDDATE TYPE STRING,
COLLECTIONITEMRECEIVEDATE TYPE STRING,
SYSTEMMESSAGETYPE TYPE STRING,
SYSTEMMESSAGEIDENTIFICATION TYPE STRING,
SYSTEMMESSAGENUMBER TYPE STRING,
SYSTEMMESSAGEVARIABLE1 TYPE STRING,
SYSTEMMESSAGEVARIABLE2 TYPE STRING,
SYSTEMMESSAGEVARIABLE3 TYPE STRING,
SYSTEMMESSAGEVARIABLE4 TYPE STRING,
LASTCHANGEDBYUSERNAME TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKCOLLITEM_GFN_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_FKKCOLLITEM_GFN_STR-CACOLLECTIONAGENCY sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACOLLECTIONITEM sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACOLLITEMGROUPINGLEVEL sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACOLLITEMSQNCNUMBER sy-vline 
WA_FKKCOLLITEM_GFN_STR-BUSINESSPARTNER sy-vline 
WA_FKKCOLLITEM_GFN_STR-CAPARENTCOLLECTIONITEM sy-vline 
WA_FKKCOLLITEM_GFN_STR-CAPARENTCOLLITEMGROUPINGLEVEL sy-vline 
WA_FKKCOLLITEM_GFN_STR-TRANSACTIONCURRENCY sy-vline 
WA_FKKCOLLITEM_GFN_STR-CASUBMITTEDAMOUNTINTRANSCRCY sy-vline 
WA_FKKCOLLITEM_GFN_STR-CADATEOFTRANSFERTOCOLLAGCY sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACALLBACKAMOUNTINTRANSCRCY sy-vline 
WA_FKKCOLLITEM_GFN_STR-RECEIVABLECALLBACKDATE sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACOLLECTIONITEMCATEGORY sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACOLLECTIONITEMSTATUS sy-vline 
WA_FKKCOLLITEM_GFN_STR-VALUEDATE sy-vline 
WA_FKKCOLLITEM_GFN_STR-CANONCOLLECTABLEAMOUNT sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACOLLAGCYINTRSTRECEIVABLEAMT sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACOLLAGCYCHARGERECEIVABLEAMT sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACOLLECTIONITEMTEXT sy-vline 
WA_FKKCOLLITEM_GFN_STR-CACOLLITEMPROCESSINGSTATUS sy-vline 
WA_FKKCOLLITEM_GFN_STR-CAMASSRUNDATE sy-vline 
WA_FKKCOLLITEM_GFN_STR-CAMASSRUNID sy-vline 
WA_FKKCOLLITEM_GFN_STR-COLLECTIONITEMSENDDATE sy-vline 
WA_FKKCOLLITEM_GFN_STR-COLLECTIONITEMRECEIVEDATE sy-vline 
WA_FKKCOLLITEM_GFN_STR-SYSTEMMESSAGETYPE sy-vline 
WA_FKKCOLLITEM_GFN_STR-SYSTEMMESSAGEIDENTIFICATION sy-vline 
WA_FKKCOLLITEM_GFN_STR-SYSTEMMESSAGENUMBER sy-vline 
WA_FKKCOLLITEM_GFN_STR-SYSTEMMESSAGEVARIABLE1 sy-vline 
WA_FKKCOLLITEM_GFN_STR-SYSTEMMESSAGEVARIABLE2 sy-vline 
WA_FKKCOLLITEM_GFN_STR-SYSTEMMESSAGEVARIABLE3 sy-vline 
WA_FKKCOLLITEM_GFN_STR-SYSTEMMESSAGEVARIABLE4 sy-vline 
WA_FKKCOLLITEM_GFN_STR-LASTCHANGEDBYUSERNAME sy-vline 
WA_FKKCOLLITEM_GFN_STR-LASTCHANGEDATE sy-vline 
WA_FKKCOLLITEM_GFN_STR-LASTCHANGETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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