ABAP Select data from SAP table FKKFA_PARA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKFA_PARA
*  INTO TABLE @DATA(IT_FKKFA_PARA2).
*--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_FKKFA_PARA INDEX 1 INTO DATA(WA_FKKFA_PARA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKFA_PARA>-APPLK = 1.
<FKKFA_PARA>-BUDAT = 1.
<FKKFA_PARA>-FAEDS_HIGH = 1.
<FKKFA_PARA>-FAEDS_LOW = 1.
<FKKFA_PARA>-VARIG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKFA_PARA-VARIV, sy-vline,
  WA_FKKFA_PARA-LIMIT, sy-vline,
  WA_FKKFA_PARA-SLNAM_GPART, sy-vline,
  WA_FKKFA_PARA-SLNAM_VKONT, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_FKKFA_PARA 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_FKKFA_PARA 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_FKKFA_PARA INTO WA_FKKFA_PARA.


*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_FKKFA_PARA_STR, 
APPLK TYPE STRING,
BUDAT TYPE STRING,
FAEDS_HIGH TYPE STRING,
FAEDS_LOW TYPE STRING,
VARIG TYPE STRING,
VARIV TYPE STRING,
LIMIT TYPE STRING,
SLNAM_GPART TYPE STRING,
SLNAM_VKONT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKFA_PARA_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_FKKFA_PARA_STR-APPLK sy-vline 
WA_FKKFA_PARA_STR-BUDAT sy-vline 
WA_FKKFA_PARA_STR-FAEDS_HIGH sy-vline 
WA_FKKFA_PARA_STR-FAEDS_LOW sy-vline 
WA_FKKFA_PARA_STR-VARIG sy-vline 
WA_FKKFA_PARA_STR-VARIV sy-vline 
WA_FKKFA_PARA_STR-LIMIT sy-vline 
WA_FKKFA_PARA_STR-SLNAM_GPART sy-vline 
WA_FKKFA_PARA_STR-SLNAM_VKONT sy-vline      INTO ld_text SEPARATED BY SPACE.

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