ABAP Select data from SAP table ITAXBOXSTRUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ITAXBOXSTRUC
*  INTO TABLE @DATA(IT_ITAXBOXSTRUC2).
*--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_ITAXBOXSTRUC INDEX 1 INTO DATA(WA_ITAXBOXSTRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ITAXBOXSTRUC>-SAPCLIENT = 1.
<ITAXBOXSTRUC>-COUNTRY = 1.
<ITAXBOXSTRUC>-TAXBOXSTRUCVALIDITYSTARTDATE = 1.
<ITAXBOXSTRUC>-TAXBOXSTRUCTURETYPE = 1.
<ITAXBOXSTRUC>-TAXBOXSTRUCVALIDITYENDDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ITAXBOXSTRUC-VALIDTO, sy-vline,
  WA_ITAXBOXSTRUC-VALIDFROM, sy-vline,
  WA_ITAXBOXSTRUC-TAXBOXSTRUCTURE, sy-vline,
  WA_ITAXBOXSTRUC-TAXBOXSTRUCTURENAME, sy-vline,
  WA_ITAXBOXSTRUC-TAXBOX, sy-vline,
  WA_ITAXBOXSTRUC-TAXBOXNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ITAXBOXSTRUC 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_ITAXBOXSTRUC 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_ITAXBOXSTRUC INTO WA_ITAXBOXSTRUC.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ITAXBOXSTRUC_STR, 
SAPCLIENT TYPE STRING,
COUNTRY TYPE STRING,
TAXBOXSTRUCVALIDITYSTARTDATE TYPE STRING,
TAXBOXSTRUCTURETYPE TYPE STRING,
TAXBOXSTRUCVALIDITYENDDATE TYPE STRING,
VALIDTO TYPE STRING,
VALIDFROM TYPE STRING,
TAXBOXSTRUCTURE TYPE STRING,
TAXBOXSTRUCTURENAME TYPE STRING,
TAXBOX TYPE STRING,
TAXBOXNAME TYPE STRING,
TAXBOXCONDITION TYPE STRING,
TAXBOXOUTPUTTYPE TYPE STRING,
TAXGROUP TYPE STRING,
TAXCODE TYPE STRING,
TRANSACTIONTYPEDETERMINATION TYPE STRING,
DEBITCREDITCODE TYPE STRING,
TAXRATE TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
SPECIALGLCODE TYPE STRING,
SUPPLIERACCOUNTGROUP TYPE STRING,
TAXGROUPOPERATION TYPE STRING,
TAXBOXAGGREGATIONOPERATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ITAXBOXSTRUC_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_ITAXBOXSTRUC_STR-SAPCLIENT sy-vline 
WA_ITAXBOXSTRUC_STR-COUNTRY sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOXSTRUCVALIDITYSTARTDATE sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOXSTRUCTURETYPE sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOXSTRUCVALIDITYENDDATE sy-vline 
WA_ITAXBOXSTRUC_STR-VALIDTO sy-vline 
WA_ITAXBOXSTRUC_STR-VALIDFROM sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOXSTRUCTURE sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOXSTRUCTURENAME sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOX sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOXNAME sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOXCONDITION sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOXOUTPUTTYPE sy-vline 
WA_ITAXBOXSTRUC_STR-TAXGROUP sy-vline 
WA_ITAXBOXSTRUC_STR-TAXCODE sy-vline 
WA_ITAXBOXSTRUC_STR-TRANSACTIONTYPEDETERMINATION sy-vline 
WA_ITAXBOXSTRUC_STR-DEBITCREDITCODE sy-vline 
WA_ITAXBOXSTRUC_STR-TAXRATE sy-vline 
WA_ITAXBOXSTRUC_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_ITAXBOXSTRUC_STR-SPECIALGLCODE sy-vline 
WA_ITAXBOXSTRUC_STR-SUPPLIERACCOUNTGROUP sy-vline 
WA_ITAXBOXSTRUC_STR-TAXGROUPOPERATION sy-vline 
WA_ITAXBOXSTRUC_STR-TAXBOXAGGREGATIONOPERATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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