ABAP Select data from SAP table IDGT_STRUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IDGT_STRUC
*  INTO TABLE @DATA(IT_IDGT_STRUC2).
*--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_IDGT_STRUC INDEX 1 INTO DATA(WA_IDGT_STRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IDGT_STRUC>-MARK = 1.
<IDGT_STRUC>-VBELN = 1.
<IDGT_STRUC>-REFVBELN = 1.
<IDGT_STRUC>-POSNR = 1.
<IDGT_STRUC>-GTLINENO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IDGT_STRUC-FILETYPE, sy-vline,
  WA_IDGT_STRUC-GTVBELN, sy-vline,
  WA_IDGT_STRUC-TOTLINEITEM, sy-vline,
  WA_IDGT_STRUC-NOTE, sy-vline,
  WA_IDGT_STRUC-GTSTATUS, sy-vline,
  WA_IDGT_STRUC-SPLITIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IDGT_STRUC 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_IDGT_STRUC 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_IDGT_STRUC INTO WA_IDGT_STRUC.


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

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IDGT_STRUC-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IDGT_STRUC-MEINS.
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_IDGT_STRUC_STR, 
MARK TYPE STRING,
VBELN TYPE STRING,
REFVBELN TYPE STRING,
POSNR TYPE STRING,
GTLINENO TYPE STRING,
FILETYPE TYPE STRING,
GTVBELN TYPE STRING,
TOTLINEITEM TYPE STRING,
NOTE TYPE STRING,
GTSTATUS TYPE STRING,
SPLITIND TYPE STRING,
NAME1 TYPE STRING,
STCEG TYPE STRING,
STRAS TYPE STRING,
MCOD3 TYPE STRING,
TELF1 TYPE STRING,
BANKN TYPE STRING,
FKDAT TYPE STRING,
BUTXT TYPE STRING,
SBANKN TYPE STRING,
MAKTX TYPE STRING,
MEINS TYPE STRING,
PTEXT TYPE STRING,
INVQUAN TYPE STRING,
NETVALUE TYPE STRING,
TAXRATE TYPE STRING,
TAXAMT TYPE STRING,
DISCOUNT TYPE STRING,
TAXDIS TYPE STRING,
DISCOUNT_RATE TYPE STRING,
GLISTIND TYPE STRING,
GOODSLIST TYPE STRING,
CANCELIND TYPE STRING,
UNITPRICE TYPE STRING,
UNITPRICE_MODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IDGT_STRUC_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_IDGT_STRUC_STR-MARK sy-vline 
WA_IDGT_STRUC_STR-VBELN sy-vline 
WA_IDGT_STRUC_STR-REFVBELN sy-vline 
WA_IDGT_STRUC_STR-POSNR sy-vline 
WA_IDGT_STRUC_STR-GTLINENO sy-vline 
WA_IDGT_STRUC_STR-FILETYPE sy-vline 
WA_IDGT_STRUC_STR-GTVBELN sy-vline 
WA_IDGT_STRUC_STR-TOTLINEITEM sy-vline 
WA_IDGT_STRUC_STR-NOTE sy-vline 
WA_IDGT_STRUC_STR-GTSTATUS sy-vline 
WA_IDGT_STRUC_STR-SPLITIND sy-vline 
WA_IDGT_STRUC_STR-NAME1 sy-vline 
WA_IDGT_STRUC_STR-STCEG sy-vline 
WA_IDGT_STRUC_STR-STRAS sy-vline 
WA_IDGT_STRUC_STR-MCOD3 sy-vline 
WA_IDGT_STRUC_STR-TELF1 sy-vline 
WA_IDGT_STRUC_STR-BANKN sy-vline 
WA_IDGT_STRUC_STR-FKDAT sy-vline 
WA_IDGT_STRUC_STR-BUTXT sy-vline 
WA_IDGT_STRUC_STR-SBANKN sy-vline 
WA_IDGT_STRUC_STR-MAKTX sy-vline 
WA_IDGT_STRUC_STR-MEINS sy-vline 
WA_IDGT_STRUC_STR-PTEXT sy-vline 
WA_IDGT_STRUC_STR-INVQUAN sy-vline 
WA_IDGT_STRUC_STR-NETVALUE sy-vline 
WA_IDGT_STRUC_STR-TAXRATE sy-vline 
WA_IDGT_STRUC_STR-TAXAMT sy-vline 
WA_IDGT_STRUC_STR-DISCOUNT sy-vline 
WA_IDGT_STRUC_STR-TAXDIS sy-vline 
WA_IDGT_STRUC_STR-DISCOUNT_RATE sy-vline 
WA_IDGT_STRUC_STR-GLISTIND sy-vline 
WA_IDGT_STRUC_STR-GOODSLIST sy-vline 
WA_IDGT_STRUC_STR-CANCELIND sy-vline 
WA_IDGT_STRUC_STR-UNITPRICE sy-vline 
WA_IDGT_STRUC_STR-UNITPRICE_MODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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