ABAP Select data from SAP table KTOF into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KTOF
*  INTO TABLE @DATA(IT_KTOF2).
*--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_KTOF INDEX 1 INTO DATA(WA_KTOF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KTOF>-BWKEY = 1.
<KTOF>-BUKRS = 1.
<KTOF>-BUTXT = 1.
<KTOF>-KTOPL = 1.
<KTOF>-KTPLT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KTOF-WERKS, sy-vline,
  WA_KTOF-NAME1, sy-vline,
  WA_KTOF-BWMOD, sy-vline,
  WA_KTOF-BKLAS, sy-vline,
  WA_KTOF-BKBEZ, sy-vline,
  WA_KTOF-KKREF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KTOF 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_KTOF 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_KTOF INTO WA_KTOF.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_KTOF-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KTOF-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field KONTS_1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KTOF-KONTS_1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KTOF-KONTS_1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KONTH_1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KTOF-KONTH_1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KTOF-KONTH_1.
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_KTOF_STR, 
BWKEY TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
KTOPL TYPE STRING,
KTPLT TYPE STRING,
WERKS TYPE STRING,
NAME1 TYPE STRING,
BWMOD TYPE STRING,
BKLAS TYPE STRING,
BKBEZ TYPE STRING,
KKREF TYPE STRING,
MTART TYPE STRING,
MTBEZ TYPE STRING,
BWTTY TYPE STRING,
BWTAR TYPE STRING,
TEXT01 TYPE STRING,
TEXT02 TYPE STRING,
TEXT03 TYPE STRING,
TEXT04 TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
BWART TYPE STRING,
BTEXT TYPE STRING,
KTOSL TYPE STRING,
XKOMO TYPE STRING,
XBWMO TYPE STRING,
XBKLA TYPE STRING,
XDIKO TYPE STRING,
LTEXT TYPE STRING,
VOTXT TYPE STRING,
CNT02 TYPE STRING,
KOMOK TYPE STRING,
KONTS TYPE STRING,
KONTH TYPE STRING,
KONTS_1 TYPE STRING,
KONTH_1 TYPE STRING,
AKZ TYPE STRING,
BSCHS TYPE STRING,
BSCHH TYPE STRING,
ENTRY TYPE STRING,
ENTRY_TOT TYPE STRING,
SIM_AG TYPE STRING,
SIM_INPUT TYPE STRING,
SIM_KCHECK TYPE STRING,
CHECK_KTO TYPE STRING,
COPY_MODE TYPE STRING,
COPY_MODTX TYPE STRING,
TEXT30 TYPE STRING,
TEXT50 TYPE STRING,
OPTION_1 TYPE STRING,
OPTION_2 TYPE STRING,
COUNT TYPE STRING,
XFELD TYPE STRING,
TXTKS TYPE STRING,
TXTKH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KTOF_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_KTOF_STR-BWKEY sy-vline 
WA_KTOF_STR-BUKRS sy-vline 
WA_KTOF_STR-BUTXT sy-vline 
WA_KTOF_STR-KTOPL sy-vline 
WA_KTOF_STR-KTPLT sy-vline 
WA_KTOF_STR-WERKS sy-vline 
WA_KTOF_STR-NAME1 sy-vline 
WA_KTOF_STR-BWMOD sy-vline 
WA_KTOF_STR-BKLAS sy-vline 
WA_KTOF_STR-BKBEZ sy-vline 
WA_KTOF_STR-KKREF sy-vline 
WA_KTOF_STR-MTART sy-vline 
WA_KTOF_STR-MTBEZ sy-vline 
WA_KTOF_STR-BWTTY sy-vline 
WA_KTOF_STR-BWTAR sy-vline 
WA_KTOF_STR-TEXT01 sy-vline 
WA_KTOF_STR-TEXT02 sy-vline 
WA_KTOF_STR-TEXT03 sy-vline 
WA_KTOF_STR-TEXT04 sy-vline 
WA_KTOF_STR-MATNR sy-vline 
WA_KTOF_STR-MAKTX sy-vline 
WA_KTOF_STR-BWART sy-vline 
WA_KTOF_STR-BTEXT sy-vline 
WA_KTOF_STR-KTOSL sy-vline 
WA_KTOF_STR-XKOMO sy-vline 
WA_KTOF_STR-XBWMO sy-vline 
WA_KTOF_STR-XBKLA sy-vline 
WA_KTOF_STR-XDIKO sy-vline 
WA_KTOF_STR-LTEXT sy-vline 
WA_KTOF_STR-VOTXT sy-vline 
WA_KTOF_STR-CNT02 sy-vline 
WA_KTOF_STR-KOMOK sy-vline 
WA_KTOF_STR-KONTS sy-vline 
WA_KTOF_STR-KONTH sy-vline 
WA_KTOF_STR-KONTS_1 sy-vline 
WA_KTOF_STR-KONTH_1 sy-vline 
WA_KTOF_STR-AKZ sy-vline 
WA_KTOF_STR-BSCHS sy-vline 
WA_KTOF_STR-BSCHH sy-vline 
WA_KTOF_STR-ENTRY sy-vline 
WA_KTOF_STR-ENTRY_TOT sy-vline 
WA_KTOF_STR-SIM_AG sy-vline 
WA_KTOF_STR-SIM_INPUT sy-vline 
WA_KTOF_STR-SIM_KCHECK sy-vline 
WA_KTOF_STR-CHECK_KTO sy-vline 
WA_KTOF_STR-COPY_MODE sy-vline 
WA_KTOF_STR-COPY_MODTX sy-vline 
WA_KTOF_STR-TEXT30 sy-vline 
WA_KTOF_STR-TEXT50 sy-vline 
WA_KTOF_STR-OPTION_1 sy-vline 
WA_KTOF_STR-OPTION_2 sy-vline 
WA_KTOF_STR-COUNT sy-vline 
WA_KTOF_STR-XFELD sy-vline 
WA_KTOF_STR-TXTKS sy-vline 
WA_KTOF_STR-TXTKH sy-vline      INTO ld_text SEPARATED BY SPACE.

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