ABAP Select data from SAP table PTWZEROTAXITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTWZEROTAXITEM
*  INTO TABLE @DATA(IT_PTWZEROTAXITEM2).
*--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_PTWZEROTAXITEM INDEX 1 INTO DATA(WA_PTWZEROTAXITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTWZEROTAXITEM>-MANDT = 1.
<PTWZEROTAXITEM>-COMPANYCODE = 1.
<PTWZEROTAXITEM>-ACCOUNTINGDOCUMENT = 1.
<PTWZEROTAXITEM>-FISCALYEAR = 1.
<PTWZEROTAXITEM>-TAXGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTWZEROTAXITEM-TAIWANESECALENDARYEAR, sy-vline,
  WA_PTWZEROTAXITEM-POSTINGMONTH, sy-vline,
  WA_PTWZEROTAXITEM-DOCUMENTREFERENCEID, sy-vline,
  WA_PTWZEROTAXITEM-TAXCODE, sy-vline,
  WA_PTWZEROTAXITEM-TAXRATE, sy-vline,
  WA_PTWZEROTAXITEM-SUPPLIERCOUNTRY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTWZEROTAXITEM 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_PTWZEROTAXITEM 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_PTWZEROTAXITEM INTO WA_PTWZEROTAXITEM.


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

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

*Conversion exit ALPHA, internal->external for field BUSINESSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PTWZEROTAXITEM-BUSINESSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTWZEROTAXITEM-BUSINESSPARTNER.
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_PTWZEROTAXITEM_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
FISCALYEAR TYPE STRING,
TAXGROUP TYPE STRING,
TAIWANESECALENDARYEAR TYPE STRING,
POSTINGMONTH TYPE STRING,
DOCUMENTREFERENCEID TYPE STRING,
TAXCODE TYPE STRING,
TAXRATE TYPE STRING,
SUPPLIERCOUNTRY TYPE STRING,
CUSTOMERCOUNTRY TYPE STRING,
CUSTOMERTAXID1 TYPE STRING,
POSTINGDATE TYPE STRING,
DOCUMENTDATE TYPE STRING,
REPORTINGDATE TYPE STRING,
TAXREPORTINGDATE TYPE STRING,
BUSINESSPLACE TYPE STRING,
BUSINESSPARTNER TYPE STRING,
DISTRICTTAXOFFICE TYPE STRING,
SUPPLIERTAXID1 TYPE STRING,
SUPPLIERTAXID2 TYPE STRING,
ZEROTAXRATEDECLARATIONTYPE TYPE STRING,
GOODSARECLEARED TYPE STRING,
EXPORTTYPE TYPE STRING,
CUSTOMSDOCUMENT TYPE STRING,
ACCOUNTINGDOCUMENTCLASS TYPE STRING,
EXPORTAMOUNTINCOMPANYCODECRCY TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
EXPORTDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTWZEROTAXITEM_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_PTWZEROTAXITEM_STR-MANDT sy-vline 
WA_PTWZEROTAXITEM_STR-COMPANYCODE sy-vline 
WA_PTWZEROTAXITEM_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_PTWZEROTAXITEM_STR-FISCALYEAR sy-vline 
WA_PTWZEROTAXITEM_STR-TAXGROUP sy-vline 
WA_PTWZEROTAXITEM_STR-TAIWANESECALENDARYEAR sy-vline 
WA_PTWZEROTAXITEM_STR-POSTINGMONTH sy-vline 
WA_PTWZEROTAXITEM_STR-DOCUMENTREFERENCEID sy-vline 
WA_PTWZEROTAXITEM_STR-TAXCODE sy-vline 
WA_PTWZEROTAXITEM_STR-TAXRATE sy-vline 
WA_PTWZEROTAXITEM_STR-SUPPLIERCOUNTRY sy-vline 
WA_PTWZEROTAXITEM_STR-CUSTOMERCOUNTRY sy-vline 
WA_PTWZEROTAXITEM_STR-CUSTOMERTAXID1 sy-vline 
WA_PTWZEROTAXITEM_STR-POSTINGDATE sy-vline 
WA_PTWZEROTAXITEM_STR-DOCUMENTDATE sy-vline 
WA_PTWZEROTAXITEM_STR-REPORTINGDATE sy-vline 
WA_PTWZEROTAXITEM_STR-TAXREPORTINGDATE sy-vline 
WA_PTWZEROTAXITEM_STR-BUSINESSPLACE sy-vline 
WA_PTWZEROTAXITEM_STR-BUSINESSPARTNER sy-vline 
WA_PTWZEROTAXITEM_STR-DISTRICTTAXOFFICE sy-vline 
WA_PTWZEROTAXITEM_STR-SUPPLIERTAXID1 sy-vline 
WA_PTWZEROTAXITEM_STR-SUPPLIERTAXID2 sy-vline 
WA_PTWZEROTAXITEM_STR-ZEROTAXRATEDECLARATIONTYPE sy-vline 
WA_PTWZEROTAXITEM_STR-GOODSARECLEARED sy-vline 
WA_PTWZEROTAXITEM_STR-EXPORTTYPE sy-vline 
WA_PTWZEROTAXITEM_STR-CUSTOMSDOCUMENT sy-vline 
WA_PTWZEROTAXITEM_STR-ACCOUNTINGDOCUMENTCLASS sy-vline 
WA_PTWZEROTAXITEM_STR-EXPORTAMOUNTINCOMPANYCODECRCY sy-vline 
WA_PTWZEROTAXITEM_STR-COMPANYCODECURRENCY sy-vline 
WA_PTWZEROTAXITEM_STR-EXPORTDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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