ABAP Select data from SAP table FKKPM_IAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKPM_IAT
*  INTO TABLE @DATA(IT_FKKPM_IAT2).
*--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_FKKPM_IAT INDEX 1 INTO DATA(WA_FKKPM_IAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKPM_IAT>-PAYGR = 1.
<FKKPM_IAT>-XADDN = 1.
<FKKPM_IAT>-MAXADDN = 1.
<FKKPM_IAT>-XCRLF = 1.
<FKKPM_IAT>-PREFIXTAXID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKPM_IAT-FCBANKNAME, sy-vline,
  WA_FKKPM_IAT-FCBANKNAMEIDQUAL, sy-vline,
  WA_FKKPM_IAT-FCBANKNAMEID, sy-vline,
  WA_FKKPM_IAT-FCBANKBRCTYCODE, sy-vline,
  WA_FKKPM_IAT-FXCHGIND, sy-vline,
  WA_FKKPM_IAT-FXCHGREFIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKPM_IAT 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_FKKPM_IAT 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_FKKPM_IAT INTO WA_FKKPM_IAT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FKKPM_IAT_STR, 
PAYGR TYPE STRING,
XADDN TYPE STRING,
MAXADDN TYPE STRING,
XCRLF TYPE STRING,
PREFIXTAXID TYPE STRING,
FCBANKNAME TYPE STRING,
FCBANKNAMEIDQUAL TYPE STRING,
FCBANKNAMEID TYPE STRING,
FCBANKBRCTYCODE TYPE STRING,
FXCHGIND TYPE STRING,
FXCHGREFIND TYPE STRING,
FXHGREF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKPM_IAT_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_FKKPM_IAT_STR-PAYGR sy-vline 
WA_FKKPM_IAT_STR-XADDN sy-vline 
WA_FKKPM_IAT_STR-MAXADDN sy-vline 
WA_FKKPM_IAT_STR-XCRLF sy-vline 
WA_FKKPM_IAT_STR-PREFIXTAXID sy-vline 
WA_FKKPM_IAT_STR-FCBANKNAME sy-vline 
WA_FKKPM_IAT_STR-FCBANKNAMEIDQUAL sy-vline 
WA_FKKPM_IAT_STR-FCBANKNAMEID sy-vline 
WA_FKKPM_IAT_STR-FCBANKBRCTYCODE sy-vline 
WA_FKKPM_IAT_STR-FXCHGIND sy-vline 
WA_FKKPM_IAT_STR-FXCHGREFIND sy-vline 
WA_FKKPM_IAT_STR-FXHGREF sy-vline      INTO ld_text SEPARATED BY SPACE.

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