ABAP Select data from SAP table IRETAXCORRITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IRETAXCORRITEM
*  INTO TABLE @DATA(IT_IRETAXCORRITEM2).
*--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_IRETAXCORRITEM INDEX 1 INTO DATA(WA_IRETAXCORRITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IRETAXCORRITEM>-MANDT = 1.
<IRETAXCORRITEM>-INTERNALREALESTATENUMBER = 1.
<IRETAXCORRITEM>-COMPANYCODE = 1.
<IRETAXCORRITEM>-RETAXCORRECTIONITEM = 1.
<IRETAXCORRITEM>-RESTATUSOBJECT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IRETAXCORRITEM-CREATEDBYUSER, sy-vline,
  WA_IRETAXCORRITEM-CREATIONDATE, sy-vline,
  WA_IRETAXCORRITEM-CREATIONTIME, sy-vline,
  WA_IRETAXCORRITEM-RESOURCEOFCREATION, sy-vline,
  WA_IRETAXCORRITEM-LASTCHANGEDBYUSER, sy-vline,
  WA_IRETAXCORRITEM-LASTCHANGEDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IRETAXCORRITEM 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_IRETAXCORRITEM 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_IRETAXCORRITEM INTO WA_IRETAXCORRITEM.


*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 RETAXCORRECTIONITEMTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IRETAXCORRITEM-RETAXCORRECTIONITEMTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IRETAXCORRITEM-RETAXCORRECTIONITEMTYPE.
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_IRETAXCORRITEM_STR, 
MANDT TYPE STRING,
INTERNALREALESTATENUMBER TYPE STRING,
COMPANYCODE TYPE STRING,
RETAXCORRECTIONITEM TYPE STRING,
RESTATUSOBJECT TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
CREATIONTIME TYPE STRING,
RESOURCEOFCREATION TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGETIME TYPE STRING,
RESOURCEOFCHANGE TYPE STRING,
RESPONSIBLE TYPE STRING,
REUSEREXCLUSIVE TYPE STRING,
REAUTHORIZATIONGROUP TYPE STRING,
RETAXCORRECTIONITEMNAME TYPE STRING,
RETAXCORRECTIONITEMTYPE TYPE STRING,
CURRENCY TYPE STRING,
RECORRECTIONPERIODSTARTDATE TYPE STRING,
RECORRECTIONPERIODENDDATE TYPE STRING,
REFIRSTUSEDDATE TYPE STRING,
RESERVICEPERIODSTARTDATE TYPE STRING,
RESERVICEPERIODENDDATE TYPE STRING,
RECORRECTIONOBJECTSTATUS TYPE STRING,
REFIRSTCORRECTIONDATE TYPE STRING,
READDITIONALTEXT TYPE STRING,
RECRRTNOBJECTRELEASESTATUS TYPE STRING,
REALESTATEOBJECTTYPE TYPE STRING,
REIDENTIFICATIONKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IRETAXCORRITEM_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_IRETAXCORRITEM_STR-MANDT sy-vline 
WA_IRETAXCORRITEM_STR-INTERNALREALESTATENUMBER sy-vline 
WA_IRETAXCORRITEM_STR-COMPANYCODE sy-vline 
WA_IRETAXCORRITEM_STR-RETAXCORRECTIONITEM sy-vline 
WA_IRETAXCORRITEM_STR-RESTATUSOBJECT sy-vline 
WA_IRETAXCORRITEM_STR-CREATEDBYUSER sy-vline 
WA_IRETAXCORRITEM_STR-CREATIONDATE sy-vline 
WA_IRETAXCORRITEM_STR-CREATIONTIME sy-vline 
WA_IRETAXCORRITEM_STR-RESOURCEOFCREATION sy-vline 
WA_IRETAXCORRITEM_STR-LASTCHANGEDBYUSER sy-vline 
WA_IRETAXCORRITEM_STR-LASTCHANGEDATE sy-vline 
WA_IRETAXCORRITEM_STR-LASTCHANGETIME sy-vline 
WA_IRETAXCORRITEM_STR-RESOURCEOFCHANGE sy-vline 
WA_IRETAXCORRITEM_STR-RESPONSIBLE sy-vline 
WA_IRETAXCORRITEM_STR-REUSEREXCLUSIVE sy-vline 
WA_IRETAXCORRITEM_STR-REAUTHORIZATIONGROUP sy-vline 
WA_IRETAXCORRITEM_STR-RETAXCORRECTIONITEMNAME sy-vline 
WA_IRETAXCORRITEM_STR-RETAXCORRECTIONITEMTYPE sy-vline 
WA_IRETAXCORRITEM_STR-CURRENCY sy-vline 
WA_IRETAXCORRITEM_STR-RECORRECTIONPERIODSTARTDATE sy-vline 
WA_IRETAXCORRITEM_STR-RECORRECTIONPERIODENDDATE sy-vline 
WA_IRETAXCORRITEM_STR-REFIRSTUSEDDATE sy-vline 
WA_IRETAXCORRITEM_STR-RESERVICEPERIODSTARTDATE sy-vline 
WA_IRETAXCORRITEM_STR-RESERVICEPERIODENDDATE sy-vline 
WA_IRETAXCORRITEM_STR-RECORRECTIONOBJECTSTATUS sy-vline 
WA_IRETAXCORRITEM_STR-REFIRSTCORRECTIONDATE sy-vline 
WA_IRETAXCORRITEM_STR-READDITIONALTEXT sy-vline 
WA_IRETAXCORRITEM_STR-RECRRTNOBJECTRELEASESTATUS sy-vline 
WA_IRETAXCORRITEM_STR-REALESTATEOBJECTTYPE sy-vline 
WA_IRETAXCORRITEM_STR-REIDENTIFICATIONKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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