ABAP Select data from SAP table ITCTK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ITCTK
*  INTO TABLE @DATA(IT_ITCTK2).
*--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_ITCTK INDEX 1 INTO DATA(WA_ITCTK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ITCTK>-TDFILEIMP = 1.
<ITCTK>-TDFILEEXP = 1.
<ITCTK>-TDRTF = 1.
<ITCTK>-TDASCII = 1.
<ITCTK>-TDITF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ITCTK-TDHTML, sy-vline,
  WA_ITCTK-TDFILENAME, sy-vline,
  WA_ITCTK-TDCODEPAGE, sy-vline,
  WA_ITCTK-TDLINESIZE, sy-vline,
  WA_ITCTK-TDCHANGEFT, sy-vline,
  WA_ITCTK-TDSSHEET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ITCTK 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_ITCTK 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_ITCTK INTO WA_ITCTK.


*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_ITCTK_STR, 
TDFILEIMP TYPE STRING,
TDFILEEXP TYPE STRING,
TDRTF TYPE STRING,
TDASCII TYPE STRING,
TDITF TYPE STRING,
TDHTML TYPE STRING,
TDFILENAME TYPE STRING,
TDCODEPAGE TYPE STRING,
TDLINESIZE TYPE STRING,
TDCHANGEFT TYPE STRING,
TDSSHEET TYPE STRING,
TDFROMSTYL TYPE STRING,
TDTOSTYLE TYPE STRING,
TDFROMFORM TYPE STRING,
TDTOFORM TYPE STRING,
TDFROMSHEE TYPE STRING,
TDTOSHEET TYPE STRING,
TDFROMNAME TYPE STRING,
TDTONAME TYPE STRING,
TDDOMINANT TYPE STRING,
TDRTFIMP TYPE STRING,
TDRTFEXP TYPE STRING,
TDITFITF TYPE STRING,
TDSHEETIMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ITCTK_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_ITCTK_STR-TDFILEIMP sy-vline 
WA_ITCTK_STR-TDFILEEXP sy-vline 
WA_ITCTK_STR-TDRTF sy-vline 
WA_ITCTK_STR-TDASCII sy-vline 
WA_ITCTK_STR-TDITF sy-vline 
WA_ITCTK_STR-TDHTML sy-vline 
WA_ITCTK_STR-TDFILENAME sy-vline 
WA_ITCTK_STR-TDCODEPAGE sy-vline 
WA_ITCTK_STR-TDLINESIZE sy-vline 
WA_ITCTK_STR-TDCHANGEFT sy-vline 
WA_ITCTK_STR-TDSSHEET sy-vline 
WA_ITCTK_STR-TDFROMSTYL sy-vline 
WA_ITCTK_STR-TDTOSTYLE sy-vline 
WA_ITCTK_STR-TDFROMFORM sy-vline 
WA_ITCTK_STR-TDTOFORM sy-vline 
WA_ITCTK_STR-TDFROMSHEE sy-vline 
WA_ITCTK_STR-TDTOSHEET sy-vline 
WA_ITCTK_STR-TDFROMNAME sy-vline 
WA_ITCTK_STR-TDTONAME sy-vline 
WA_ITCTK_STR-TDDOMINANT sy-vline 
WA_ITCTK_STR-TDRTFIMP sy-vline 
WA_ITCTK_STR-TDRTFEXP sy-vline 
WA_ITCTK_STR-TDITFITF sy-vline 
WA_ITCTK_STR-TDSHEETIMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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