ABAP Select data from SAP table IESSRTAXITEMGRP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IESSRTAXITEMGRP
*  INTO TABLE @DATA(IT_IESSRTAXITEMGRP2).
*--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_IESSRTAXITEMGRP INDEX 1 INTO DATA(WA_IESSRTAXITEMGRP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IESSRTAXITEMGRP>-MANDT = 1.
<IESSRTAXITEMGRP>-COUNTRY = 1.
<IESSRTAXITEMGRP>-TAXITEMGROUPINGVERSION = 1.
<IESSRTAXITEMGRP>-TAXCODE = 1.
<IESSRTAXITEMGRP>-TRANSACTIONTYPEDETERMINATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IESSRTAXITEMGRP-DEBITCREDITCODE, sy-vline,
  WA_IESSRTAXITEMGRP-TAXBOX, sy-vline,
  WA_IESSRTAXITEMGRP-TAXDECLNAMOUNTTYPE, sy-vline,
  WA_IESSRTAXITEMGRP-ACCOUNTINGDOCUMENTTYPE, sy-vline,
  WA_IESSRTAXITEMGRP-SUPPLIERACCOUNTGROUP, sy-vline,
  WA_IESSRTAXITEMGRP-TAXCALCULATIONPROCEDURE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IESSRTAXITEMGRP 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_IESSRTAXITEMGRP 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_IESSRTAXITEMGRP INTO WA_IESSRTAXITEMGRP.


*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_IESSRTAXITEMGRP_STR, 
MANDT TYPE STRING,
COUNTRY TYPE STRING,
TAXITEMGROUPINGVERSION TYPE STRING,
TAXCODE TYPE STRING,
TRANSACTIONTYPEDETERMINATION TYPE STRING,
DEBITCREDITCODE TYPE STRING,
TAXBOX TYPE STRING,
TAXDECLNAMOUNTTYPE TYPE STRING,
ACCOUNTINGDOCUMENTTYPE TYPE STRING,
SUPPLIERACCOUNTGROUP TYPE STRING,
TAXCALCULATIONPROCEDURE TYPE STRING,
TAXTYPE TYPE STRING,
TARGETTAXCODE TYPE STRING,
TAXRETURNCOUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IESSRTAXITEMGRP_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_IESSRTAXITEMGRP_STR-MANDT sy-vline 
WA_IESSRTAXITEMGRP_STR-COUNTRY sy-vline 
WA_IESSRTAXITEMGRP_STR-TAXITEMGROUPINGVERSION sy-vline 
WA_IESSRTAXITEMGRP_STR-TAXCODE sy-vline 
WA_IESSRTAXITEMGRP_STR-TRANSACTIONTYPEDETERMINATION sy-vline 
WA_IESSRTAXITEMGRP_STR-DEBITCREDITCODE sy-vline 
WA_IESSRTAXITEMGRP_STR-TAXBOX sy-vline 
WA_IESSRTAXITEMGRP_STR-TAXDECLNAMOUNTTYPE sy-vline 
WA_IESSRTAXITEMGRP_STR-ACCOUNTINGDOCUMENTTYPE sy-vline 
WA_IESSRTAXITEMGRP_STR-SUPPLIERACCOUNTGROUP sy-vline 
WA_IESSRTAXITEMGRP_STR-TAXCALCULATIONPROCEDURE sy-vline 
WA_IESSRTAXITEMGRP_STR-TAXTYPE sy-vline 
WA_IESSRTAXITEMGRP_STR-TARGETTAXCODE sy-vline 
WA_IESSRTAXITEMGRP_STR-TAXRETURNCOUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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