ABAP Select data from SAP table J_3RFTAXRO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RFTAXRO 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 J_3RFTAXRO. 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 J_3RFTAXRO 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_J_3RFTAXRO TYPE STANDARD TABLE OF J_3RFTAXRO,
      WA_J_3RFTAXRO TYPE J_3RFTAXRO,
      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: <J_3RFTAXRO> TYPE J_3RFTAXRO.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RFTAXRO.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RFTAXRO
  INTO TABLE IT_J_3RFTAXRO.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RFTAXRO
*  INTO TABLE @DATA(IT_J_3RFTAXRO2).
*--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_J_3RFTAXRO INDEX 1 INTO DATA(WA_J_3RFTAXRO2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RFTAXRO ASSIGNING <J_3RFTAXRO>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RFTAXRO>-MANDT = 1.
<J_3RFTAXRO>-OBJNR = 1.
<J_3RFTAXRO>-DATIV = 1.
<J_3RFTAXRO>-DATIB = 1.
<J_3RFTAXRO>-DATPV = 1.

ENDLOOP.

LOOP AT IT_J_3RFTAXRO INTO WA_J_3RFTAXRO.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RFTAXRO-DATPB, sy-vline,
  WA_J_3RFTAXRO-BUKRS, sy-vline,
  WA_J_3RFTAXRO-TAXOBJ, sy-vline,
  WA_J_3RFTAXRO-EXPTYPE, sy-vline,
  WA_J_3RFTAXRO-ACTIVTYP, sy-vline,
  WA_J_3RFTAXRO-ACCT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RFTAXRO 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_J_3RFTAXRO 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_J_3RFTAXRO INTO WA_J_3RFTAXRO.


*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 ACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFTAXRO-ACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFTAXRO-ACCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFTAXRO-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFTAXRO-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFTAXRO-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFTAXRO-PRODUCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFTAXRO-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFTAXRO-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFTAXRO-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFTAXRO-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTRLAGT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RFTAXRO-KTRLAGT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RFTAXRO-KTRLAGT.
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_J_3RFTAXRO_STR, 
MANDT TYPE STRING,
OBJNR TYPE STRING,
DATIV TYPE STRING,
DATIB TYPE STRING,
DATPV TYPE STRING,
DATPB TYPE STRING,
BUKRS TYPE STRING,
TAXOBJ TYPE STRING,
EXPTYPE TYPE STRING,
ACTIVTYP TYPE STRING,
ACCT TYPE STRING,
MATNR TYPE STRING,
MATKL TYPE STRING,
PRODUCT TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
TAXREG TYPE STRING,
TAXROW TYPE STRING,
CONTRACT TYPE STRING,
KTRLAGT TYPE STRING,
DIVISION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RFTAXRO_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_J_3RFTAXRO_STR-MANDT sy-vline 
WA_J_3RFTAXRO_STR-OBJNR sy-vline 
WA_J_3RFTAXRO_STR-DATIV sy-vline 
WA_J_3RFTAXRO_STR-DATIB sy-vline 
WA_J_3RFTAXRO_STR-DATPV sy-vline 
WA_J_3RFTAXRO_STR-DATPB sy-vline 
WA_J_3RFTAXRO_STR-BUKRS sy-vline 
WA_J_3RFTAXRO_STR-TAXOBJ sy-vline 
WA_J_3RFTAXRO_STR-EXPTYPE sy-vline 
WA_J_3RFTAXRO_STR-ACTIVTYP sy-vline 
WA_J_3RFTAXRO_STR-ACCT sy-vline 
WA_J_3RFTAXRO_STR-MATNR sy-vline 
WA_J_3RFTAXRO_STR-MATKL sy-vline 
WA_J_3RFTAXRO_STR-PRODUCT sy-vline 
WA_J_3RFTAXRO_STR-ANLN1 sy-vline 
WA_J_3RFTAXRO_STR-ANLN2 sy-vline 
WA_J_3RFTAXRO_STR-TAXREG sy-vline 
WA_J_3RFTAXRO_STR-TAXROW sy-vline 
WA_J_3RFTAXRO_STR-CONTRACT sy-vline 
WA_J_3RFTAXRO_STR-KTRLAGT sy-vline 
WA_J_3RFTAXRO_STR-DIVISION sy-vline      INTO ld_text SEPARATED BY SPACE.

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