ABAP Select data from SAP table REEXC_TAX_CODE_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_TAX_CODE_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_TAX_CODE_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_TAX_CODE_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_TAX_CODE_X TYPE STANDARD TABLE OF REEXC_TAX_CODE_X,
      WA_REEXC_TAX_CODE_X TYPE REEXC_TAX_CODE_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_TAX_CODE_X> TYPE REEXC_TAX_CODE_X.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REEXC_TAX_CODE_X
*  INTO TABLE @DATA(IT_REEXC_TAX_CODE_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_TAX_CODE_X INDEX 1 INTO DATA(WA_REEXC_TAX_CODE_X2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REEXC_TAX_CODE_X>-MANDT = 1.
<REEXC_TAX_CODE_X>-KALSM = 1.
<REEXC_TAX_CODE_X>-MWSKZ = 1.
<REEXC_TAX_CODE_X>-PRUEF = 1.
<REEXC_TAX_CODE_X>-MWART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REEXC_TAX_CODE_X-XMSTU, sy-vline,
  WA_REEXC_TAX_CODE_X-ZMWSK, sy-vline,
  WA_REEXC_TAX_CODE_X-EGRKZ, sy-vline,
  WA_REEXC_TAX_CODE_X-XSLTA, sy-vline,
  WA_REEXC_TAX_CODE_X-PROCD, sy-vline,
  WA_REEXC_TAX_CODE_X-TXIND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REEXC_TAX_CODE_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_TAX_CODE_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_TAX_CODE_X INTO WA_REEXC_TAX_CODE_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 J_1BTAXLW1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEXC_TAX_CODE_X-J_1BTAXLW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEXC_TAX_CODE_X-J_1BTAXLW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_1BTAXLW2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEXC_TAX_CODE_X-J_1BTAXLW2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEXC_TAX_CODE_X-J_1BTAXLW2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_1BTAXLW4
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEXC_TAX_CODE_X-J_1BTAXLW4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEXC_TAX_CODE_X-J_1BTAXLW4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field J_1BTAXLW5
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REEXC_TAX_CODE_X-J_1BTAXLW5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEXC_TAX_CODE_X-J_1BTAXLW5.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_REEXC_TAX_CODE_X-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REEXC_TAX_CODE_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_TAX_CODE_X_STR, 
MANDT TYPE STRING,
KALSM TYPE STRING,
MWSKZ TYPE STRING,
PRUEF TYPE STRING,
MWART TYPE STRING,
XMSTU TYPE STRING,
ZMWSK TYPE STRING,
EGRKZ TYPE STRING,
XSLTA TYPE STRING,
PROCD TYPE STRING,
TXIND TYPE STRING,
TXREL TYPE STRING,
LSTML TYPE STRING,
J_1BUSAGE TYPE STRING,
J_1BISS TYPE STRING,
J_1BTAXLW1 TYPE STRING,
J_1BTAXLW2 TYPE STRING,
J_1BTXICEX TYPE STRING,
J_1BTXIPEX TYPE STRING,
TOLERANCE TYPE STRING,
ZMWSK_ESA TYPE STRING,
ZMWSK_ESE TYPE STRING,
NEWDEFTAX TYPE STRING,
J_1BTAXLW4 TYPE STRING,
J_1BTAXLW5 TYPE STRING,
XINACT TYPE STRING,
MOSSC TYPE STRING,
OSS_CLASSIFICATION TYPE STRING,
SPRAS TYPE STRING,
TEXT1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REEXC_TAX_CODE_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_TAX_CODE_X_STR-MANDT sy-vline 
WA_REEXC_TAX_CODE_X_STR-KALSM sy-vline 
WA_REEXC_TAX_CODE_X_STR-MWSKZ sy-vline 
WA_REEXC_TAX_CODE_X_STR-PRUEF sy-vline 
WA_REEXC_TAX_CODE_X_STR-MWART sy-vline 
WA_REEXC_TAX_CODE_X_STR-XMSTU sy-vline 
WA_REEXC_TAX_CODE_X_STR-ZMWSK sy-vline 
WA_REEXC_TAX_CODE_X_STR-EGRKZ sy-vline 
WA_REEXC_TAX_CODE_X_STR-XSLTA sy-vline 
WA_REEXC_TAX_CODE_X_STR-PROCD sy-vline 
WA_REEXC_TAX_CODE_X_STR-TXIND sy-vline 
WA_REEXC_TAX_CODE_X_STR-TXREL sy-vline 
WA_REEXC_TAX_CODE_X_STR-LSTML sy-vline 
WA_REEXC_TAX_CODE_X_STR-J_1BUSAGE sy-vline 
WA_REEXC_TAX_CODE_X_STR-J_1BISS sy-vline 
WA_REEXC_TAX_CODE_X_STR-J_1BTAXLW1 sy-vline 
WA_REEXC_TAX_CODE_X_STR-J_1BTAXLW2 sy-vline 
WA_REEXC_TAX_CODE_X_STR-J_1BTXICEX sy-vline 
WA_REEXC_TAX_CODE_X_STR-J_1BTXIPEX sy-vline 
WA_REEXC_TAX_CODE_X_STR-TOLERANCE sy-vline 
WA_REEXC_TAX_CODE_X_STR-ZMWSK_ESA sy-vline 
WA_REEXC_TAX_CODE_X_STR-ZMWSK_ESE sy-vline 
WA_REEXC_TAX_CODE_X_STR-NEWDEFTAX sy-vline 
WA_REEXC_TAX_CODE_X_STR-J_1BTAXLW4 sy-vline 
WA_REEXC_TAX_CODE_X_STR-J_1BTAXLW5 sy-vline 
WA_REEXC_TAX_CODE_X_STR-XINACT sy-vline 
WA_REEXC_TAX_CODE_X_STR-MOSSC sy-vline 
WA_REEXC_TAX_CODE_X_STR-OSS_CLASSIFICATION sy-vline 
WA_REEXC_TAX_CODE_X_STR-SPRAS sy-vline 
WA_REEXC_TAX_CODE_X_STR-TEXT1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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