ABAP Select data from SAP table IKNKKF1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IKNKKF1 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 IKNKKF1. 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 IKNKKF1 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_IKNKKF1 TYPE STANDARD TABLE OF IKNKKF1,
      WA_IKNKKF1 TYPE IKNKKF1,
      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: <IKNKKF1> TYPE IKNKKF1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_IKNKKF1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM IKNKKF1
  INTO TABLE IT_IKNKKF1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IKNKKF1
*  INTO TABLE @DATA(IT_IKNKKF12).
*--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_IKNKKF1 INDEX 1 INTO DATA(WA_IKNKKF12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_IKNKKF1 ASSIGNING <IKNKKF1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IKNKKF1>-MANDT = 1.
<IKNKKF1>-LOGSYS = 1.
<IKNKKF1>-KUNNR = 1.
<IKNKKF1>-KKBER = 1.
<IKNKKF1>-REGUL = 1.

ENDLOOP.

LOOP AT IT_IKNKKF1 INTO WA_IKNKKF1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IKNKKF1-TMSTMP, sy-vline,
  WA_IKNKKF1-SFAEL, sy-vline,
  WA_IKNKKF1-WAERS, sy-vline,
  WA_IKNKKF1-BUKRSM, sy-vline,
  WA_IKNKKF1-KUNNRM, sy-vline,
  WA_IKNKKF1-MABER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IKNKKF1 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_IKNKKF1 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_IKNKKF1 INTO WA_IKNKKF1.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SFAEL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-SFAEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-SFAEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNRM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-KUNNRM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-KUNNRM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNROOI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-KUNNROOI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-KUNNROOI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-WRBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU152, internal->external for field KLIMK
CALL FUNCTION 'CONVERSION_EXIT_AU152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-KLIMK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-KLIMK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNKLI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-KNKLI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-KNKLI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SKFOR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-SKFOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-SKFOR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field SSOBL
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-SSOBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-SSOBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field ABSBT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-ABSBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-ABSBT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field KPSUMOPKUM
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-KPSUMOPKUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-KPSUMOPKUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field AKSUMOPKUM
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-AKSUMOPKUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-AKSUMOPKUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field AKOBLIG
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-AKOBLIG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-AKOBLIG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field KPOBLIG
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-KPOBLIG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-KPOBLIG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field AKSAUFT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-AKSAUFT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-AKSAUFT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field KPSAUFT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_IKNKKF1-KPSAUFT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKNKKF1-KPSAUFT.
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_IKNKKF1_STR, 
MANDT TYPE STRING,
LOGSYS TYPE STRING,
KUNNR TYPE STRING,
KKBER TYPE STRING,
REGUL TYPE STRING,
TMSTMP TYPE STRING,
SFAEL TYPE STRING,
WAERS TYPE STRING,
BUKRSM TYPE STRING,
KUNNRM TYPE STRING,
MABER TYPE STRING,
MAHNS TYPE STRING,
BELNR TYPE STRING,
BUKRSOOI TYPE STRING,
FAEDT TYPE STRING,
GJAHR TYPE STRING,
INFAE TYPE STRING,
KUNNROOI TYPE STRING,
VERZN TYPE STRING,
WAERSOOI TYPE STRING,
WRBTR TYPE STRING,
KLIMK TYPE STRING,
KNKLI TYPE STRING,
SKFOR TYPE STRING,
SSOBL TYPE STRING,
WAERS_KNKK TYPE STRING,
CTLPC TYPE STRING,
CRBLB TYPE STRING,
NXTRV TYPE STRING,
ABSBT TYPE STRING,
KPSUMOPKUM TYPE STRING,
AKSUMOPKUM TYPE STRING,
AKPRZOPK TYPE STRING,
KPPRZOPK TYPE STRING,
AKPDTOL TYPE STRING,
KPPDTOL TYPE STRING,
KPOOI TYPE STRING,
AKOOI TYPE STRING,
AKNPRDAT TYPE STRING,
KPNPRDAT TYPE STRING,
KPKLIMK TYPE STRING,
AKKLIMK TYPE STRING,
KPMAHNS TYPE STRING,
AKMAHNS TYPE STRING,
AKERLTA TYPE STRING,
AKERLST TYPE STRING,
KPERLTA TYPE STRING,
KPERLST TYPE STRING,
CRMGR TYPE STRING,
KPHORDA TYPE STRING,
AKHORDA TYPE STRING,
AKOBLIG TYPE STRING,
KPOBLIG TYPE STRING,
AKSAUFT TYPE STRING,
KPSAUFT TYPE STRING,
AKKLIMAG TYPE STRING,
KPKLIMAG TYPE STRING,
RKPPRZOPK TYPE STRING,
RAKPRZOPK TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
ORT01 TYPE STRING,
ORT02 TYPE STRING,
LAND1 TYPE STRING,
CITYC TYPE STRING,
COUNC TYPE STRING,
PSTLZ TYPE STRING,
PFACH TYPE STRING,
REGIO TYPE STRING,
STRAS TYPE STRING,
TELF1 TYPE STRING,
TELF2 TYPE STRING,
TELFX TYPE STRING,
TELTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IKNKKF1_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_IKNKKF1_STR-MANDT sy-vline 
WA_IKNKKF1_STR-LOGSYS sy-vline 
WA_IKNKKF1_STR-KUNNR sy-vline 
WA_IKNKKF1_STR-KKBER sy-vline 
WA_IKNKKF1_STR-REGUL sy-vline 
WA_IKNKKF1_STR-TMSTMP sy-vline 
WA_IKNKKF1_STR-SFAEL sy-vline 
WA_IKNKKF1_STR-WAERS sy-vline 
WA_IKNKKF1_STR-BUKRSM sy-vline 
WA_IKNKKF1_STR-KUNNRM sy-vline 
WA_IKNKKF1_STR-MABER sy-vline 
WA_IKNKKF1_STR-MAHNS sy-vline 
WA_IKNKKF1_STR-BELNR sy-vline 
WA_IKNKKF1_STR-BUKRSOOI sy-vline 
WA_IKNKKF1_STR-FAEDT sy-vline 
WA_IKNKKF1_STR-GJAHR sy-vline 
WA_IKNKKF1_STR-INFAE sy-vline 
WA_IKNKKF1_STR-KUNNROOI sy-vline 
WA_IKNKKF1_STR-VERZN sy-vline 
WA_IKNKKF1_STR-WAERSOOI sy-vline 
WA_IKNKKF1_STR-WRBTR sy-vline 
WA_IKNKKF1_STR-KLIMK sy-vline 
WA_IKNKKF1_STR-KNKLI sy-vline 
WA_IKNKKF1_STR-SKFOR sy-vline 
WA_IKNKKF1_STR-SSOBL sy-vline 
WA_IKNKKF1_STR-WAERS_KNKK sy-vline 
WA_IKNKKF1_STR-CTLPC sy-vline 
WA_IKNKKF1_STR-CRBLB sy-vline 
WA_IKNKKF1_STR-NXTRV sy-vline 
WA_IKNKKF1_STR-ABSBT sy-vline 
WA_IKNKKF1_STR-KPSUMOPKUM sy-vline 
WA_IKNKKF1_STR-AKSUMOPKUM sy-vline 
WA_IKNKKF1_STR-AKPRZOPK sy-vline 
WA_IKNKKF1_STR-KPPRZOPK sy-vline 
WA_IKNKKF1_STR-AKPDTOL sy-vline 
WA_IKNKKF1_STR-KPPDTOL sy-vline 
WA_IKNKKF1_STR-KPOOI sy-vline 
WA_IKNKKF1_STR-AKOOI sy-vline 
WA_IKNKKF1_STR-AKNPRDAT sy-vline 
WA_IKNKKF1_STR-KPNPRDAT sy-vline 
WA_IKNKKF1_STR-KPKLIMK sy-vline 
WA_IKNKKF1_STR-AKKLIMK sy-vline 
WA_IKNKKF1_STR-KPMAHNS sy-vline 
WA_IKNKKF1_STR-AKMAHNS sy-vline 
WA_IKNKKF1_STR-AKERLTA sy-vline 
WA_IKNKKF1_STR-AKERLST sy-vline 
WA_IKNKKF1_STR-KPERLTA sy-vline 
WA_IKNKKF1_STR-KPERLST sy-vline 
WA_IKNKKF1_STR-CRMGR sy-vline 
WA_IKNKKF1_STR-KPHORDA sy-vline 
WA_IKNKKF1_STR-AKHORDA sy-vline 
WA_IKNKKF1_STR-AKOBLIG sy-vline 
WA_IKNKKF1_STR-KPOBLIG sy-vline 
WA_IKNKKF1_STR-AKSAUFT sy-vline 
WA_IKNKKF1_STR-KPSAUFT sy-vline 
WA_IKNKKF1_STR-AKKLIMAG sy-vline 
WA_IKNKKF1_STR-KPKLIMAG sy-vline 
WA_IKNKKF1_STR-RKPPRZOPK sy-vline 
WA_IKNKKF1_STR-RAKPRZOPK sy-vline 
WA_IKNKKF1_STR-NAME1 sy-vline 
WA_IKNKKF1_STR-NAME2 sy-vline 
WA_IKNKKF1_STR-NAME3 sy-vline 
WA_IKNKKF1_STR-NAME4 sy-vline 
WA_IKNKKF1_STR-ORT01 sy-vline 
WA_IKNKKF1_STR-ORT02 sy-vline 
WA_IKNKKF1_STR-LAND1 sy-vline 
WA_IKNKKF1_STR-CITYC sy-vline 
WA_IKNKKF1_STR-COUNC sy-vline 
WA_IKNKKF1_STR-PSTLZ sy-vline 
WA_IKNKKF1_STR-PFACH sy-vline 
WA_IKNKKF1_STR-REGIO sy-vline 
WA_IKNKKF1_STR-STRAS sy-vline 
WA_IKNKKF1_STR-TELF1 sy-vline 
WA_IKNKKF1_STR-TELF2 sy-vline 
WA_IKNKKF1_STR-TELFX sy-vline 
WA_IKNKKF1_STR-TELTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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