ABAP Select data from SAP table FKKZWF2PARMS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKZWF2PARMS 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 FKKZWF2PARMS. 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 FKKZWF2PARMS 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_FKKZWF2PARMS TYPE STANDARD TABLE OF FKKZWF2PARMS,
      WA_FKKZWF2PARMS TYPE FKKZWF2PARMS,
      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: <FKKZWF2PARMS> TYPE FKKZWF2PARMS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FKKZWF2PARMS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FKKZWF2PARMS
  INTO TABLE IT_FKKZWF2PARMS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKZWF2PARMS
*  INTO TABLE @DATA(IT_FKKZWF2PARMS2).
*--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_FKKZWF2PARMS INDEX 1 INTO DATA(WA_FKKZWF2PARMS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FKKZWF2PARMS ASSIGNING <FKKZWF2PARMS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKZWF2PARMS>-WRTON = 1.
<FKKZWF2PARMS>-SEL_OFF_POS = 1.
<FKKZWF2PARMS>-SEL_BER_POS = 1.
<FKKZWF2PARMS>-ABGZDT = 1.
<FKKZWF2PARMS>-BUDAT = 1.

ENDLOOP.

LOOP AT IT_FKKZWF2PARMS INTO WA_FKKZWF2PARMS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKZWF2PARMS-GRUND, sy-vline,
  WA_FKKZWF2PARMS-GRUNDT, sy-vline,
  WA_FKKZWF2PARMS-VARI, sy-vline,
  WA_FKKZWF2PARMS-VARIT, sy-vline,
  WA_FKKZWF2PARMS-WBSTOR, sy-vline,
  WA_FKKZWF2PARMS-RGRND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKZWF2PARMS 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_FKKZWF2PARMS 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_FKKZWF2PARMS INTO WA_FKKZWF2PARMS.


*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_FKKZWF2PARMS_STR, 
WRTON TYPE STRING,
SEL_OFF_POS TYPE STRING,
SEL_BER_POS TYPE STRING,
ABGZDT TYPE STRING,
BUDAT TYPE STRING,
GRUND TYPE STRING,
GRUNDT TYPE STRING,
VARI TYPE STRING,
VARIT TYPE STRING,
WBSTOR TYPE STRING,
RGRND TYPE STRING,
REDAT TYPE STRING,
MET1 TYPE STRING,
MET2 TYPE STRING,
MET3 TYPE STRING,
MET4 TYPE STRING,
MET5 TYPE STRING,
FIKNZ TYPE STRING,
FIKNZT TYPE STRING,
XVARI TYPE STRING,
XVDYN TYPE STRING,
BWBER TYPE STRING,
BBTXT TYPE STRING,
XFVA TYPE STRING,
SEL_OPE_LIS TYPE STRING,
ERDAT TYPE STRING,
LISTT TYPE STRING,
GUID TYPE STRING,
KEYDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKZWF2PARMS_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_FKKZWF2PARMS_STR-WRTON sy-vline 
WA_FKKZWF2PARMS_STR-SEL_OFF_POS sy-vline 
WA_FKKZWF2PARMS_STR-SEL_BER_POS sy-vline 
WA_FKKZWF2PARMS_STR-ABGZDT sy-vline 
WA_FKKZWF2PARMS_STR-BUDAT sy-vline 
WA_FKKZWF2PARMS_STR-GRUND sy-vline 
WA_FKKZWF2PARMS_STR-GRUNDT sy-vline 
WA_FKKZWF2PARMS_STR-VARI sy-vline 
WA_FKKZWF2PARMS_STR-VARIT sy-vline 
WA_FKKZWF2PARMS_STR-WBSTOR sy-vline 
WA_FKKZWF2PARMS_STR-RGRND sy-vline 
WA_FKKZWF2PARMS_STR-REDAT sy-vline 
WA_FKKZWF2PARMS_STR-MET1 sy-vline 
WA_FKKZWF2PARMS_STR-MET2 sy-vline 
WA_FKKZWF2PARMS_STR-MET3 sy-vline 
WA_FKKZWF2PARMS_STR-MET4 sy-vline 
WA_FKKZWF2PARMS_STR-MET5 sy-vline 
WA_FKKZWF2PARMS_STR-FIKNZ sy-vline 
WA_FKKZWF2PARMS_STR-FIKNZT sy-vline 
WA_FKKZWF2PARMS_STR-XVARI sy-vline 
WA_FKKZWF2PARMS_STR-XVDYN sy-vline 
WA_FKKZWF2PARMS_STR-BWBER sy-vline 
WA_FKKZWF2PARMS_STR-BBTXT sy-vline 
WA_FKKZWF2PARMS_STR-XFVA sy-vline 
WA_FKKZWF2PARMS_STR-SEL_OPE_LIS sy-vline 
WA_FKKZWF2PARMS_STR-ERDAT sy-vline 
WA_FKKZWF2PARMS_STR-LISTT sy-vline 
WA_FKKZWF2PARMS_STR-GUID sy-vline 
WA_FKKZWF2PARMS_STR-KEYDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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