ABAP Select data from SAP table REEXC_DOC_TYPE_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 REEXC_DOC_TYPE_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 REEXC_DOC_TYPE_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 REEXC_DOC_TYPE_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_REEXC_DOC_TYPE_FI_X TYPE STANDARD TABLE OF REEXC_DOC_TYPE_FI_X,
      WA_REEXC_DOC_TYPE_FI_X TYPE REEXC_DOC_TYPE_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: <REEXC_DOC_TYPE_FI_X> TYPE REEXC_DOC_TYPE_FI_X.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEXC_DOC_TYPE_FI_X
*  INTO TABLE @DATA(IT_REEXC_DOC_TYPE_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_REEXC_DOC_TYPE_FI_X INDEX 1 INTO DATA(WA_REEXC_DOC_TYPE_FI_X2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEXC_DOC_TYPE_FI_X>-MANDT = 1.
<REEXC_DOC_TYPE_FI_X>-BLART = 1.
<REEXC_DOC_TYPE_FI_X>-NUMKR = 1.
<REEXC_DOC_TYPE_FI_X>-KOARS = 1.
<REEXC_DOC_TYPE_FI_X>-STBLA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEXC_DOC_TYPE_FI_X-XNETB, sy-vline,
  WA_REEXC_DOC_TYPE_FI_X-XRVUP, sy-vline,
  WA_REEXC_DOC_TYPE_FI_X-XSYBL, sy-vline,
  WA_REEXC_DOC_TYPE_FI_X-XVORK, sy-vline,
  WA_REEXC_DOC_TYPE_FI_X-XKKPR, sy-vline,
  WA_REEXC_DOC_TYPE_FI_X-XGSUB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEXC_DOC_TYPE_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_REEXC_DOC_TYPE_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_REEXC_DOC_TYPE_FI_X INTO WA_REEXC_DOC_TYPE_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 RECID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEXC_DOC_TYPE_FI_X-RECID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEXC_DOC_TYPE_FI_X-RECID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_REEXC_DOC_TYPE_FI_X-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEXC_DOC_TYPE_FI_X-SPRAS.
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_REEXC_DOC_TYPE_FI_X_STR, 
MANDT TYPE STRING,
BLART TYPE STRING,
NUMKR TYPE STRING,
KOARS TYPE STRING,
STBLA TYPE STRING,
XNETB TYPE STRING,
XRVUP TYPE STRING,
XSYBL TYPE STRING,
XVORK TYPE STRING,
XKKPR TYPE STRING,
XGSUB TYPE STRING,
XMGES TYPE STRING,
BRGRU TYPE STRING,
RECID TYPE STRING,
RECIC TYPE STRING,
XMTXT TYPE STRING,
XMREF TYPE STRING,
XNGBK TYPE STRING,
KURST TYPE STRING,
XNEGP TYPE STRING,
XKOAA TYPE STRING,
XKOAD TYPE STRING,
XKOAK TYPE STRING,
XKOAM TYPE STRING,
XKOAS TYPE STRING,
XNMRL TYPE STRING,
XAUSG TYPE STRING,
XDTCH TYPE STRING,
BLKLS TYPE STRING,
XROLLUP TYPE STRING,
XPLAN TYPE STRING,
XALLOCACT TYPE STRING,
XALLOCPLAN TYPE STRING,
X_PP_PROCESS TYPE STRING,
XKURSX TYPE STRING,
XPOSACC TYPE STRING,
XUACPA TYPE STRING,
XKOASECC TYPE STRING,
XMREF2 TYPE STRING,
SPRAS TYPE STRING,
LTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEXC_DOC_TYPE_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_REEXC_DOC_TYPE_FI_X_STR-MANDT sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-BLART sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-NUMKR sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-KOARS sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-STBLA sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XNETB sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XRVUP sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XSYBL sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XVORK sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XKKPR sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XGSUB sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XMGES sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-BRGRU sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-RECID sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-RECIC sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XMTXT sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XMREF sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XNGBK sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-KURST sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XNEGP sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XKOAA sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XKOAD sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XKOAK sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XKOAM sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XKOAS sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XNMRL sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XAUSG sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XDTCH sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-BLKLS sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XROLLUP sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XPLAN sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XALLOCACT sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XALLOCPLAN sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-X_PP_PROCESS sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XKURSX sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XPOSACC sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XUACPA sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XKOASECC sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-XMREF2 sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-SPRAS sy-vline 
WA_REEXC_DOC_TYPE_FI_X_STR-LTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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