ABAP Select data from SAP table IKPF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IKPF
*  INTO TABLE @DATA(IT_IKPF2).
*--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_IKPF INDEX 1 INTO DATA(WA_IKPF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IKPF>-MANDT = 1.
<IKPF>-IBLNR = 1.
<IKPF>-GJAHR = 1.
<IKPF>-VGART = 1.
<IKPF>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IKPF-LGORT, sy-vline,
  WA_IKPF-SOBKZ, sy-vline,
  WA_IKPF-BLDAT, sy-vline,
  WA_IKPF-GIDAT, sy-vline,
  WA_IKPF-ZLDAT, sy-vline,
  WA_IKPF-BUDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IKPF 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_IKPF 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_IKPF INTO WA_IKPF.


*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 IBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IKPF-IBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKPF-IBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_IKPF-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKPF-GJAHR.
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_IKPF_STR, 
MANDT TYPE STRING,
IBLNR TYPE STRING,
GJAHR TYPE STRING,
VGART TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
SOBKZ TYPE STRING,
BLDAT TYPE STRING,
GIDAT TYPE STRING,
ZLDAT TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
USNAM TYPE STRING,
SPERR TYPE STRING,
ZSTAT TYPE STRING,
DSTAT TYPE STRING,
XBLNI TYPE STRING,
LSTAT TYPE STRING,
XBUFI TYPE STRING,
KEORD TYPE STRING,
ORDNG TYPE STRING,
INVNU TYPE STRING,
IBLTXT TYPE STRING,
INVART TYPE STRING,
LASTCHANGE_DATETIME TYPE STRING,
WSTI_BSTAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IKPF_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_IKPF_STR-MANDT sy-vline 
WA_IKPF_STR-IBLNR sy-vline 
WA_IKPF_STR-GJAHR sy-vline 
WA_IKPF_STR-VGART sy-vline 
WA_IKPF_STR-WERKS sy-vline 
WA_IKPF_STR-LGORT sy-vline 
WA_IKPF_STR-SOBKZ sy-vline 
WA_IKPF_STR-BLDAT sy-vline 
WA_IKPF_STR-GIDAT sy-vline 
WA_IKPF_STR-ZLDAT sy-vline 
WA_IKPF_STR-BUDAT sy-vline 
WA_IKPF_STR-MONAT sy-vline 
WA_IKPF_STR-USNAM sy-vline 
WA_IKPF_STR-SPERR sy-vline 
WA_IKPF_STR-ZSTAT sy-vline 
WA_IKPF_STR-DSTAT sy-vline 
WA_IKPF_STR-XBLNI sy-vline 
WA_IKPF_STR-LSTAT sy-vline 
WA_IKPF_STR-XBUFI sy-vline 
WA_IKPF_STR-KEORD sy-vline 
WA_IKPF_STR-ORDNG sy-vline 
WA_IKPF_STR-INVNU sy-vline 
WA_IKPF_STR-IBLTXT sy-vline 
WA_IKPF_STR-INVART sy-vline 
WA_IKPF_STR-LASTCHANGE_DATETIME sy-vline 
WA_IKPF_STR-WSTI_BSTAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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