ABAP Select data from SAP table IKDFTAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IKDFTAB
*  INTO TABLE @DATA(IT_IKDFTAB2).
*--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_IKDFTAB INDEX 1 INTO DATA(WA_IKDFTAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IKDFTAB>-BUKRS = 1.
<IKDFTAB>-SAKNR = 1.
<IKDFTAB>-HKONT = 1.
<IKDFTAB>-GSBER = 1.
<IKDFTAB>-BUPLA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IKDFTAB-VBUND, sy-vline,
  WA_IKDFTAB-CURTP, sy-vline,
  WA_IKDFTAB-HWAER, sy-vline,
  WA_IKDFTAB-WAERS, sy-vline,
  WA_IKDFTAB-DMBTR, sy-vline,
  WA_IKDFTAB-WRBTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IKDFTAB 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_IKDFTAB 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_IKDFTAB INTO WA_IKDFTAB.


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

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

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

*Conversion exit AU172, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_IKDFTAB-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKDFTAB-DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU172, internal->external for field WRBTR
CALL FUNCTION 'CONVERSION_EXIT_AU172_OUTPUT'
  EXPORTING
    input =                      WA_IKDFTAB-WRBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKDFTAB-WRBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field BDIFS
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_IKDFTAB-BDIFS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKDFTAB-BDIFS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field BDIFH
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_IKDFTAB-BDIFH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKDFTAB-BDIFH.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field PSEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IKDFTAB-PSEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IKDFTAB-PSEGMENT.
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_IKDFTAB_STR, 
BUKRS TYPE STRING,
SAKNR TYPE STRING,
HKONT TYPE STRING,
GSBER TYPE STRING,
BUPLA TYPE STRING,
VBUND TYPE STRING,
CURTP TYPE STRING,
HWAER TYPE STRING,
WAERS TYPE STRING,
DMBTR TYPE STRING,
WRBTR TYPE STRING,
BDIFS TYPE STRING,
BDIFH TYPE STRING,
DMEFF TYPE STRING,
ADDAA TYPE STRING,
PRCTR TYPE STRING,
PPRCT TYPE STRING,
SEGMENT TYPE STRING,
PSEGMENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IKDFTAB_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_IKDFTAB_STR-BUKRS sy-vline 
WA_IKDFTAB_STR-SAKNR sy-vline 
WA_IKDFTAB_STR-HKONT sy-vline 
WA_IKDFTAB_STR-GSBER sy-vline 
WA_IKDFTAB_STR-BUPLA sy-vline 
WA_IKDFTAB_STR-VBUND sy-vline 
WA_IKDFTAB_STR-CURTP sy-vline 
WA_IKDFTAB_STR-HWAER sy-vline 
WA_IKDFTAB_STR-WAERS sy-vline 
WA_IKDFTAB_STR-DMBTR sy-vline 
WA_IKDFTAB_STR-WRBTR sy-vline 
WA_IKDFTAB_STR-BDIFS sy-vline 
WA_IKDFTAB_STR-BDIFH sy-vline 
WA_IKDFTAB_STR-DMEFF sy-vline 
WA_IKDFTAB_STR-ADDAA sy-vline 
WA_IKDFTAB_STR-PRCTR sy-vline 
WA_IKDFTAB_STR-PPRCT sy-vline 
WA_IKDFTAB_STR-SEGMENT sy-vline 
WA_IKDFTAB_STR-PSEGMENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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