ABAP Select data from SAP table J_1UF_TAX_REGISTER_MATR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1UF_TAX_REGISTER_MATR 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_1UF_TAX_REGISTER_MATR. 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_1UF_TAX_REGISTER_MATR 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_1UF_TAX_REGISTER_MATR TYPE STANDARD TABLE OF J_1UF_TAX_REGISTER_MATR,
      WA_J_1UF_TAX_REGISTER_MATR TYPE J_1UF_TAX_REGISTER_MATR,
      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_1UF_TAX_REGISTER_MATR> TYPE J_1UF_TAX_REGISTER_MATR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1UF_TAX_REGISTER_MATR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1UF_TAX_REGISTER_MATR
  INTO TABLE IT_J_1UF_TAX_REGISTER_MATR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1UF_TAX_REGISTER_MATR
*  INTO TABLE @DATA(IT_J_1UF_TAX_REGISTER_MATR2).
*--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_1UF_TAX_REGISTER_MATR INDEX 1 INTO DATA(WA_J_1UF_TAX_REGISTER_MATR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1UF_TAX_REGISTER_MATR ASSIGNING <J_1UF_TAX_REGISTER_MATR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1UF_TAX_REGISTER_MATR>-GROUP = 1.
<J_1UF_TAX_REGISTER_MATR>-BUKRS = 1.
<J_1UF_TAX_REGISTER_MATR>-BELNR = 1.
<J_1UF_TAX_REGISTER_MATR>-GJAHR = 1.
<J_1UF_TAX_REGISTER_MATR>-BUZEI_LONG = 1.

ENDLOOP.

LOOP AT IT_J_1UF_TAX_REGISTER_MATR INTO WA_J_1UF_TAX_REGISTER_MATR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1UF_TAX_REGISTER_MATR-BUZEI, sy-vline,
  WA_J_1UF_TAX_REGISTER_MATR-SHKZG, sy-vline,
  WA_J_1UF_TAX_REGISTER_MATR-VBELN, sy-vline,
  WA_J_1UF_TAX_REGISTER_MATR-POSNR, sy-vline,
  WA_J_1UF_TAX_REGISTER_MATR-VBEL2, sy-vline,
  WA_J_1UF_TAX_REGISTER_MATR-POSN2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_1UF_TAX_REGISTER_MATR 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_1UF_TAX_REGISTER_MATR 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_1UF_TAX_REGISTER_MATR INTO WA_J_1UF_TAX_REGISTER_MATR.


*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 GROUP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1UF_TAX_REGISTER_MATR-GROUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1UF_TAX_REGISTER_MATR-GROUP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1UF_TAX_REGISTER_MATR-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1UF_TAX_REGISTER_MATR-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_1UF_TAX_REGISTER_MATR-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1UF_TAX_REGISTER_MATR-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1UF_TAX_REGISTER_MATR-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1UF_TAX_REGISTER_MATR-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBEL2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1UF_TAX_REGISTER_MATR-VBEL2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1UF_TAX_REGISTER_MATR-VBEL2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_1UF_TAX_REGISTER_MATR-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1UF_TAX_REGISTER_MATR-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_1UF_TAX_REGISTER_MATR-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1UF_TAX_REGISTER_MATR-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_J_1UF_TAX_REGISTER_MATR-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1UF_TAX_REGISTER_MATR-DMBTR.
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_1UF_TAX_REGISTER_MATR_STR, 
GROUP TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI_LONG TYPE STRING,
BUZEI TYPE STRING,
SHKZG TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
VBEL2 TYPE STRING,
POSN2 TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
MENGE_C TYPE STRING,
NPREI TYPE STRING,
HWAER TYPE STRING,
DMBTR TYPE STRING,
MWSKZ TYPE STRING,
ZMWSK TYPE STRING,
XBLNR TYPE STRING,
BKTXT TYPE STRING,
SGTXT TYPE STRING,
XREF1 TYPE STRING,
XREF2 TYPE STRING,
DOC_TYPE TYPE STRING,
DOC_TYPE_CORR TYPE STRING,
COMMENT TYPE STRING,
INDEX_REC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1UF_TAX_REGISTER_MATR_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_1UF_TAX_REGISTER_MATR_STR-GROUP sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-BUKRS sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-BELNR sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-GJAHR sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-BUZEI_LONG sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-BUZEI sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-SHKZG sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-VBELN sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-POSNR sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-VBEL2 sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-POSN2 sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-MATNR sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-MAKTX sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-MENGE sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-MEINS sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-MENGE_C sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-NPREI sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-HWAER sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-DMBTR sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-MWSKZ sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-ZMWSK sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-XBLNR sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-BKTXT sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-SGTXT sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-XREF1 sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-XREF2 sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-DOC_TYPE sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-DOC_TYPE_CORR sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-COMMENT sy-vline 
WA_J_1UF_TAX_REGISTER_MATR_STR-INDEX_REC sy-vline      INTO ld_text SEPARATED BY SPACE.

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