ABAP Select data from SAP table REEX_POSTING_WT_ITEM_FI_X into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REEX_POSTING_WT_ITEM_FI_X 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_POSTING_WT_ITEM_FI_X. 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_POSTING_WT_ITEM_FI_X 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_POSTING_WT_ITEM_FI_X TYPE STANDARD TABLE OF REEX_POSTING_WT_ITEM_FI_X,
      WA_REEX_POSTING_WT_ITEM_FI_X TYPE REEX_POSTING_WT_ITEM_FI_X,
      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_POSTING_WT_ITEM_FI_X> TYPE REEX_POSTING_WT_ITEM_FI_X.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEX_POSTING_WT_ITEM_FI_X
*  INTO TABLE @DATA(IT_REEX_POSTING_WT_ITEM_FI_X2).
*--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_POSTING_WT_ITEM_FI_X INDEX 1 INTO DATA(WA_REEX_POSTING_WT_ITEM_FI_X2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEX_POSTING_WT_ITEM_FI_X>-MANDT = 1.
<REEX_POSTING_WT_ITEM_FI_X>-INTRENO = 1.
<REEX_POSTING_WT_ITEM_FI_X>-TERMTYPE = 1.
<REEX_POSTING_WT_ITEM_FI_X>-TERMNO = 1.
<REEX_POSTING_WT_ITEM_FI_X>-VALIDFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEX_POSTING_WT_ITEM_FI_X-ITEMNO, sy-vline,
  WA_REEX_POSTING_WT_ITEM_FI_X-WITHTAXTYPE, sy-vline,
  WA_REEX_POSTING_WT_ITEM_FI_X-WITHTAXCODE, sy-vline,
  WA_REEX_POSTING_WT_ITEM_FI_X-COUNTRY, sy-vline,
  WA_REEX_POSTING_WT_ITEM_FI_X-XWTTYPE, sy-vline,
  WA_REEX_POSTING_WT_ITEM_FI_X-XWTCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEX_POSTING_WT_ITEM_FI_X 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_POSTING_WT_ITEM_FI_X 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_POSTING_WT_ITEM_FI_X INTO WA_REEX_POSTING_WT_ITEM_FI_X.


*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 TERMNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEX_POSTING_WT_ITEM_FI_X-TERMNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEX_POSTING_WT_ITEM_FI_X-TERMNO.
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_POSTING_WT_ITEM_FI_X_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
TERMTYPE TYPE STRING,
TERMNO TYPE STRING,
VALIDFROM TYPE STRING,
ITEMNO TYPE STRING,
WITHTAXTYPE TYPE STRING,
WITHTAXCODE TYPE STRING,
COUNTRY TYPE STRING,
XWTTYPE TYPE STRING,
XWTCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEX_POSTING_WT_ITEM_FI_X_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_POSTING_WT_ITEM_FI_X_STR-MANDT sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-INTRENO sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-TERMTYPE sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-TERMNO sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-VALIDFROM sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-ITEMNO sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-WITHTAXTYPE sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-WITHTAXCODE sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-COUNTRY sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-XWTTYPE sy-vline 
WA_REEX_POSTING_WT_ITEM_FI_X_STR-XWTCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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