ABAP Select data from SAP table IDATF into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IDATF 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 IDATF. 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 IDATF 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_IDATF TYPE STANDARD TABLE OF IDATF,
      WA_IDATF TYPE IDATF,
      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: <IDATF> TYPE IDATF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDATF
*  INTO TABLE @DATA(IT_IDATF2).
*--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_IDATF INDEX 1 INTO DATA(WA_IDATF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDATF>-FNAME = 1.
<IDATF>-FTEXT = 1.
<IDATF>-AWAHL = 1.
<IDATF>-ANZNK = 1.
<IDATF>-REFFIELD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDATF-MEINS, sy-vline,
  WA_IDATF-TYPE, sy-vline,
  WA_IDATF-MAXLN, sy-vline,
  WA_IDATF-DECIM, sy-vline,
  WA_IDATF-RFOFF, sy-vline,
  WA_IDATF-RFLEN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDATF 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_IDATF 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_IDATF INTO WA_IDATF.


*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 DTYPE, internal->external for field EHTYP
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_IDATF-EHTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDATF-EHTYP.
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_IDATF_STR, 
FNAME TYPE STRING,
FTEXT TYPE STRING,
AWAHL TYPE STRING,
ANZNK TYPE STRING,
REFFIELD TYPE STRING,
MEINS TYPE STRING,
TYPE TYPE STRING,
MAXLN TYPE STRING,
DECIM TYPE STRING,
RFOFF TYPE STRING,
RFLEN TYPE STRING,
EHTYP TYPE STRING,
FELDPOS TYPE STRING,
POSITION TYPE STRING,
MERKPOS TYPE STRING,
EHPOS TYPE STRING,
TABLE TYPE STRING,
FIELD TYPE STRING,
FLGDS TYPE STRING,
FLGDZ TYPE STRING,
FLGFC TYPE STRING,
FLGFX TYPE STRING,
FLGVI TYPE STRING,
INFUN TYPE STRING,
OUFUN TYPE STRING,
VGFUN TYPE STRING,
FTEXT10 TYPE STRING,
FTEXTO TYPE STRING,
FTEXT10O TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDATF_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_IDATF_STR-FNAME sy-vline 
WA_IDATF_STR-FTEXT sy-vline 
WA_IDATF_STR-AWAHL sy-vline 
WA_IDATF_STR-ANZNK sy-vline 
WA_IDATF_STR-REFFIELD sy-vline 
WA_IDATF_STR-MEINS sy-vline 
WA_IDATF_STR-TYPE sy-vline 
WA_IDATF_STR-MAXLN sy-vline 
WA_IDATF_STR-DECIM sy-vline 
WA_IDATF_STR-RFOFF sy-vline 
WA_IDATF_STR-RFLEN sy-vline 
WA_IDATF_STR-EHTYP sy-vline 
WA_IDATF_STR-FELDPOS sy-vline 
WA_IDATF_STR-POSITION sy-vline 
WA_IDATF_STR-MERKPOS sy-vline 
WA_IDATF_STR-EHPOS sy-vline 
WA_IDATF_STR-TABLE sy-vline 
WA_IDATF_STR-FIELD sy-vline 
WA_IDATF_STR-FLGDS sy-vline 
WA_IDATF_STR-FLGDZ sy-vline 
WA_IDATF_STR-FLGFC sy-vline 
WA_IDATF_STR-FLGFX sy-vline 
WA_IDATF_STR-FLGVI sy-vline 
WA_IDATF_STR-INFUN sy-vline 
WA_IDATF_STR-OUFUN sy-vline 
WA_IDATF_STR-VGFUN sy-vline 
WA_IDATF_STR-FTEXT10 sy-vline 
WA_IDATF_STR-FTEXTO sy-vline 
WA_IDATF_STR-FTEXT10O sy-vline      INTO ld_text SEPARATED BY SPACE.

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