ABAP Select data from SAP table FKKCOLLPAYM_IN_GFN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKCOLLPAYM_IN_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 FKKCOLLPAYM_IN_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 FKKCOLLPAYM_IN_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_FKKCOLLPAYM_IN_GFN TYPE STANDARD TABLE OF FKKCOLLPAYM_IN_GFN,
      WA_FKKCOLLPAYM_IN_GFN TYPE FKKCOLLPAYM_IN_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: <FKKCOLLPAYM_IN_GFN> TYPE FKKCOLLPAYM_IN_GFN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKCOLLPAYM_IN_GFN
*  INTO TABLE @DATA(IT_FKKCOLLPAYM_IN_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_FKKCOLLPAYM_IN_GFN INDEX 1 INTO DATA(WA_FKKCOLLPAYM_IN_GFN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKCOLLPAYM_IN_GFN>-CACOLLECTIONAGENCY = 1.
<FKKCOLLPAYM_IN_GFN>-CACOLLECTIONPAYMENT = 1.
<FKKCOLLPAYM_IN_GFN>-CACOLLECTIONPAYMENTCATEGORY = 1.
<FKKCOLLPAYM_IN_GFN>-CACOLLPAYMENTGROUPINGKEY = 1.
<FKKCOLLPAYM_IN_GFN>-BUSINESSPARTNER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKCOLLPAYM_IN_GFN-CAAMOUNTINTRANSACTIONCURRENCY, sy-vline,
  WA_FKKCOLLPAYM_IN_GFN-TRANSACTIONCURRENCY, sy-vline,
  WA_FKKCOLLPAYM_IN_GFN-VALUEDATE, sy-vline,
  WA_FKKCOLLPAYM_IN_GFN-POSTINGREVERSALDATE, sy-vline,
  WA_FKKCOLLPAYM_IN_GFN-CACHEQUE, sy-vline,
  WA_FKKCOLLPAYM_IN_GFN-CACOLLECTIONPAYMENTTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKCOLLPAYM_IN_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_FKKCOLLPAYM_IN_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_FKKCOLLPAYM_IN_GFN INTO WA_FKKCOLLPAYM_IN_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_FKKCOLLPAYM_IN_GFN-CACOLLECTIONAGENCY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCOLLPAYM_IN_GFN-CACOLLECTIONAGENCY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BUSINESSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCOLLPAYM_IN_GFN-BUSINESSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCOLLPAYM_IN_GFN-BUSINESSPARTNER.
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_FKKCOLLPAYM_IN_GFN_STR, 
CACOLLECTIONAGENCY TYPE STRING,
CACOLLECTIONPAYMENT TYPE STRING,
CACOLLECTIONPAYMENTCATEGORY TYPE STRING,
CACOLLPAYMENTGROUPINGKEY TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CAAMOUNTINTRANSACTIONCURRENCY TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
VALUEDATE TYPE STRING,
POSTINGREVERSALDATE TYPE STRING,
CACHEQUE TYPE STRING,
CACOLLECTIONPAYMENTTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKCOLLPAYM_IN_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_FKKCOLLPAYM_IN_GFN_STR-CACOLLECTIONAGENCY sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-CACOLLECTIONPAYMENT sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-CACOLLECTIONPAYMENTCATEGORY sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-CACOLLPAYMENTGROUPINGKEY sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-BUSINESSPARTNER sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-CAAMOUNTINTRANSACTIONCURRENCY sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-TRANSACTIONCURRENCY sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-VALUEDATE sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-POSTINGREVERSALDATE sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-CACHEQUE sy-vline 
WA_FKKCOLLPAYM_IN_GFN_STR-CACOLLECTIONPAYMENTTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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