ABAP Select data from SAP table FKKPLCLS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKPLCLS
*  INTO TABLE @DATA(IT_FKKPLCLS2).
*--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_FKKPLCLS INDEX 1 INTO DATA(WA_FKKPLCLS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKPLCLS>-KEYZ1 = 1.
<FKKPLCLS>-POSZA = 1.
<FKKPLCLS>-BETRK = 1.
<FKKPLCLS>-BETRZ = 1.
<FKKPLCLS>-WAERS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKPLCLS-CPUDT, sy-vline,
  WA_FKKPLCLS-CPUTM, sy-vline,
  WA_FKKPLCLS-KLAEB, sy-vline,
  WA_FKKPLCLS-BUDAT, sy-vline,
  WA_FKKPLCLS-BUKRS, sy-vline,
  WA_FKKPLCLS-KOINH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKPLCLS 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_FKKPLCLS 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_FKKPLCLS INTO WA_FKKPLCLS.


*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 KLAEB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKPLCLS-KLAEB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKPLCLS-KLAEB.
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_FKKPLCLS_STR, 
KEYZ1 TYPE STRING,
POSZA TYPE STRING,
BETRK TYPE STRING,
BETRZ TYPE STRING,
WAERS TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
KLAEB TYPE STRING,
BUDAT TYPE STRING,
BUKRS TYPE STRING,
KOINH TYPE STRING,
CHCKN TYPE STRING,
BANKN TYPE STRING,
BANKL TYPE STRING,
CCNUM TYPE STRING,
CCINS TYPE STRING,
SELT1 TYPE STRING,
SELT2 TYPE STRING,
SELT3 TYPE STRING,
SELW1 TYPE STRING,
SELW2 TYPE STRING,
SELW3 TYPE STRING,
GSBER TYPE STRING,
BLART TYPE STRING,
VALUT TYPE STRING,
ERNAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKPLCLS_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_FKKPLCLS_STR-KEYZ1 sy-vline 
WA_FKKPLCLS_STR-POSZA sy-vline 
WA_FKKPLCLS_STR-BETRK sy-vline 
WA_FKKPLCLS_STR-BETRZ sy-vline 
WA_FKKPLCLS_STR-WAERS sy-vline 
WA_FKKPLCLS_STR-CPUDT sy-vline 
WA_FKKPLCLS_STR-CPUTM sy-vline 
WA_FKKPLCLS_STR-KLAEB sy-vline 
WA_FKKPLCLS_STR-BUDAT sy-vline 
WA_FKKPLCLS_STR-BUKRS sy-vline 
WA_FKKPLCLS_STR-KOINH sy-vline 
WA_FKKPLCLS_STR-CHCKN sy-vline 
WA_FKKPLCLS_STR-BANKN sy-vline 
WA_FKKPLCLS_STR-BANKL sy-vline 
WA_FKKPLCLS_STR-CCNUM sy-vline 
WA_FKKPLCLS_STR-CCINS sy-vline 
WA_FKKPLCLS_STR-SELT1 sy-vline 
WA_FKKPLCLS_STR-SELT2 sy-vline 
WA_FKKPLCLS_STR-SELT3 sy-vline 
WA_FKKPLCLS_STR-SELW1 sy-vline 
WA_FKKPLCLS_STR-SELW2 sy-vline 
WA_FKKPLCLS_STR-SELW3 sy-vline 
WA_FKKPLCLS_STR-GSBER sy-vline 
WA_FKKPLCLS_STR-BLART sy-vline 
WA_FKKPLCLS_STR-VALUT sy-vline 
WA_FKKPLCLS_STR-ERNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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