ABAP Select data from SAP table REEX_GUI_OPACT_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEX_GUI_OPACT_ITEM
*  INTO TABLE @DATA(IT_REEX_GUI_OPACT_ITEM2).
*--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_REEX_GUI_OPACT_ITEM INDEX 1 INTO DATA(WA_REEX_GUI_OPACT_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEX_GUI_OPACT_ITEM>-MANDT = 1.
<REEX_GUI_OPACT_ITEM>-BUKRS = 1.
<REEX_GUI_OPACT_ITEM>-OPACT = 1.
<REEX_GUI_OPACT_ITEM>-HEADERNO = 1.
<REEX_GUI_OPACT_ITEM>-ITEMNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEX_GUI_OPACT_ITEM-ACCTYPE, sy-vline,
  WA_REEX_GUI_OPACT_ITEM-VENDOR, sy-vline,
  WA_REEX_GUI_OPACT_ITEM-CUSTOMER, sy-vline,
  WA_REEX_GUI_OPACT_ITEM-PARTNER, sy-vline,
  WA_REEX_GUI_OPACT_ITEM-XBPNAME, sy-vline,
  WA_REEX_GUI_OPACT_ITEM-PYMTMETH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEX_GUI_OPACT_ITEM 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_REEX_GUI_OPACT_ITEM 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_REEX_GUI_OPACT_ITEM INTO WA_REEX_GUI_OPACT_ITEM.


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

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

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEX_GUI_OPACT_ITEM-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_GUI_OPACT_ITEM-PARTNER.
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_REEX_GUI_OPACT_ITEM_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
OPACT TYPE STRING,
HEADERNO TYPE STRING,
ITEMNO TYPE STRING,
ACCTYPE TYPE STRING,
VENDOR TYPE STRING,
CUSTOMER TYPE STRING,
PARTNER TYPE STRING,
XBPNAME TYPE STRING,
PYMTMETH TYPE STRING,
PYMTMETHCRMO TYPE STRING,
PYMTBLOCK TYPE STRING,
PYMTTERM TYPE STRING,
HOUSEBKID TYPE STRING,
HOUSEBKACC TYPE STRING,
BANKDETAILID TYPE STRING,
NOTETOPAYEE TYPE STRING,
DUNNAREA TYPE STRING,
DUNNKEY TYPE STRING,
DUNNBLOCK TYPE STRING,
ACCDETKEY TYPE STRING,
COUNTRY TYPE STRING,
KOKRS TYPE STRING,
KALSM TYPE STRING,
FSTATE TYPE STRING,
SEPAMNDID TYPE STRING,
SEPARECCRDID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEX_GUI_OPACT_ITEM_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_REEX_GUI_OPACT_ITEM_STR-MANDT sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-BUKRS sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-OPACT sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-HEADERNO sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-ITEMNO sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-ACCTYPE sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-VENDOR sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-CUSTOMER sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-PARTNER sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-XBPNAME sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-PYMTMETH sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-PYMTMETHCRMO sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-PYMTBLOCK sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-PYMTTERM sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-HOUSEBKID sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-HOUSEBKACC sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-BANKDETAILID sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-NOTETOPAYEE sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-DUNNAREA sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-DUNNKEY sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-DUNNBLOCK sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-ACCDETKEY sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-COUNTRY sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-KOKRS sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-KALSM sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-FSTATE sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-SEPAMNDID sy-vline 
WA_REEX_GUI_OPACT_ITEM_STR-SEPARECCRDID sy-vline      INTO ld_text SEPARATED BY SPACE.

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