ABAP Select data from SAP table TAX_GRID_DISPLAY_ITEM_TAXES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TAX_GRID_DISPLAY_ITEM_TAXES
*  INTO TABLE @DATA(IT_TAX_GRID_DISPLAY_ITEM_TAXES2).
*--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_TAX_GRID_DISPLAY_ITEM_TAXES INDEX 1 INTO DATA(WA_TAX_GRID_DISPLAY_ITEM_TAXES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TAX_GRID_DISPLAY_ITEM_TAXES>-AWTYP = 1.
<TAX_GRID_DISPLAY_ITEM_TAXES>-AWREF = 1.
<TAX_GRID_DISPLAY_ITEM_TAXES>-AWORG = 1.
<TAX_GRID_DISPLAY_ITEM_TAXES>-DOCNR = 1.
<TAX_GRID_DISPLAY_ITEM_TAXES>-TAXPS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TAX_GRID_DISPLAY_ITEM_TAXES-MWSKZ, sy-vline,
  WA_TAX_GRID_DISPLAY_ITEM_TAXES-TXJDP, sy-vline,
  WA_TAX_GRID_DISPLAY_ITEM_TAXES-TXJLV, sy-vline,
  WA_TAX_GRID_DISPLAY_ITEM_TAXES-POS_NO, sy-vline,
  WA_TAX_GRID_DISPLAY_ITEM_TAXES-GROUP_ID, sy-vline,
  WA_TAX_GRID_DISPLAY_ITEM_TAXES-COUNTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TAX_GRID_DISPLAY_ITEM_TAXES 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_TAX_GRID_DISPLAY_ITEM_TAXES 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_TAX_GRID_DISPLAY_ITEM_TAXES INTO WA_TAX_GRID_DISPLAY_ITEM_TAXES.


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

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

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

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

*Conversion exit AC152, internal->external for field HWBAS
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_TAX_GRID_DISPLAY_ITEM_TAXES-HWBAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAX_GRID_DISPLAY_ITEM_TAXES-HWBAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field HWSTE
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_TAX_GRID_DISPLAY_ITEM_TAXES-HWSTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAX_GRID_DISPLAY_ITEM_TAXES-HWSTE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TAX_GRID_DISPLAY_ITEM_TAXES-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAX_GRID_DISPLAY_ITEM_TAXES-HKONT.
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_TAX_GRID_DISPLAY_ITEM_TAXES_STR, 
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
DOCNR TYPE STRING,
TAXPS TYPE STRING,
MWSKZ TYPE STRING,
TXJDP TYPE STRING,
TXJLV TYPE STRING,
POS_NO TYPE STRING,
GROUP_ID TYPE STRING,
COUNTRY TYPE STRING,
COMP_CODE TYPE STRING,
DIVISION TYPE STRING,
APAR_IND TYPE STRING,
TAX_TYPE TYPE STRING,
EXEMP_IND TYPE STRING,
TXDAT TYPE STRING,
TXJCD_ST TYPE STRING,
TXJCD_SF TYPE STRING,
TXJCD_POA TYPE STRING,
TXJCD_POO TYPE STRING,
ACCNT_NO TYPE STRING,
ACCNT_CLS TYPE STRING,
MATNR TYPE STRING,
PROD_CODE TYPE STRING,
GROUP_PROD_CODE TYPE STRING,
QUANTITY TYPE STRING,
UNIT TYPE STRING,
COST_OBJECT TYPE STRING,
PTP_IND TYPE STRING,
EXCERTIF TYPE STRING,
STORE_CODE TYPE STRING,
USER_REPT_DATA TYPE STRING,
TXJCD_IND TYPE STRING,
EXMATFLAG TYPE STRING,
EXCUSFLG TYPE STRING,
EXT_EXCERTIF TYPE STRING,
EXT_EXREASON TYPE STRING,
REP_DATE TYPE STRING,
CREDIT_IND TYPE STRING,
HWBAS TYPE STRING,
HWSTE TYPE STRING,
KBETR TYPE STRING,
HKONT TYPE STRING,
CURRENCY TYPE STRING,
RATEDEC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TAX_GRID_DISPLAY_ITEM_TAXES_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_TAX_GRID_DISPLAY_ITEM_TAXES_STR-AWTYP sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-AWREF sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-AWORG sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-DOCNR sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TAXPS sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-MWSKZ sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TXJDP sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TXJLV sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-POS_NO sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-GROUP_ID sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-COUNTRY sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-COMP_CODE sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-DIVISION sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-APAR_IND sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TAX_TYPE sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-EXEMP_IND sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TXDAT sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TXJCD_ST sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TXJCD_SF sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TXJCD_POA sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TXJCD_POO sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-ACCNT_NO sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-ACCNT_CLS sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-MATNR sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-PROD_CODE sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-GROUP_PROD_CODE sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-QUANTITY sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-UNIT sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-COST_OBJECT sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-PTP_IND sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-EXCERTIF sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-STORE_CODE sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-USER_REPT_DATA sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-TXJCD_IND sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-EXMATFLAG sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-EXCUSFLG sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-EXT_EXCERTIF sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-EXT_EXREASON sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-REP_DATE sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-CREDIT_IND sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-HWBAS sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-HWSTE sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-KBETR sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-HKONT sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-CURRENCY sy-vline 
WA_TAX_GRID_DISPLAY_ITEM_TAXES_STR-RATEDEC sy-vline      INTO ld_text SEPARATED BY SPACE.

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