ABAP Select data from SAP table PTWTAXITEMREV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTWTAXITEMREV
*  INTO TABLE @DATA(IT_PTWTAXITEMREV2).
*--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_PTWTAXITEMREV INDEX 1 INTO DATA(WA_PTWTAXITEMREV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTWTAXITEMREV>-MANDT = 1.
<PTWTAXITEMREV>-COMPANYCODE = 1.
<PTWTAXITEMREV>-ACCOUNTINGDOCUMENT = 1.
<PTWTAXITEMREV>-TAXITEM = 1.
<PTWTAXITEMREV>-SUPPLIERTAXID1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTWTAXITEMREV-SUPPLIERTAXID2, sy-vline,
  WA_PTWTAXITEMREV-ACCOUNTINGDOCUMENTCLASS, sy-vline,
  WA_PTWTAXITEMREV-TAXGROUP, sy-vline,
  WA_PTWTAXITEMREV-BUSINESSPLACE, sy-vline,
  WA_PTWTAXITEMREV-TAIWANESECALENDARYEAR, sy-vline,
  WA_PTWTAXITEMREV-FISCALPERIOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTWTAXITEMREV 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_PTWTAXITEMREV 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_PTWTAXITEMREV INTO WA_PTWTAXITEMREV.


*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_PTWTAXITEMREV-ACCOUNTINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTWTAXITEMREV-ACCOUNTINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PTWTAXITEMREV-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTWTAXITEMREV-SUPPLIER.
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_PTWTAXITEMREV_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
TAXITEM TYPE STRING,
SUPPLIERTAXID1 TYPE STRING,
SUPPLIERTAXID2 TYPE STRING,
ACCOUNTINGDOCUMENTCLASS TYPE STRING,
TAXGROUP TYPE STRING,
BUSINESSPLACE TYPE STRING,
TAIWANESECALENDARYEAR TYPE STRING,
FISCALPERIOD TYPE STRING,
TAXTYPE TYPE STRING,
TAXCATEGORY TYPE STRING,
DEDUCTIONTYPE TYPE STRING,
DOCUMENTDATE TYPE STRING,
POSTINGDATE TYPE STRING,
REPORTINGDATE TYPE STRING,
TAXREPORTINGDATE TYPE STRING,
TAXCODE TYPE STRING,
DOCUMENTREFERENCEID TYPE STRING,
CUSTOMER TYPE STRING,
SUPPLIER TYPE STRING,
CUSTOMERCOUNTRY TYPE STRING,
SUPPLIERCOUNTRY TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
TAXBASEAMOUNTINCOCODECRCY TYPE STRING,
TAXAMOUNTINCOCODECRCY TYPE STRING,
ZEROTAXBASEAMOUNTINCOCODECRCY TYPE STRING,
EXEMPTTAXBASEAMTINCOCODECRCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTWTAXITEMREV_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_PTWTAXITEMREV_STR-MANDT sy-vline 
WA_PTWTAXITEMREV_STR-COMPANYCODE sy-vline 
WA_PTWTAXITEMREV_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_PTWTAXITEMREV_STR-TAXITEM sy-vline 
WA_PTWTAXITEMREV_STR-SUPPLIERTAXID1 sy-vline 
WA_PTWTAXITEMREV_STR-SUPPLIERTAXID2 sy-vline 
WA_PTWTAXITEMREV_STR-ACCOUNTINGDOCUMENTCLASS sy-vline 
WA_PTWTAXITEMREV_STR-TAXGROUP sy-vline 
WA_PTWTAXITEMREV_STR-BUSINESSPLACE sy-vline 
WA_PTWTAXITEMREV_STR-TAIWANESECALENDARYEAR sy-vline 
WA_PTWTAXITEMREV_STR-FISCALPERIOD sy-vline 
WA_PTWTAXITEMREV_STR-TAXTYPE sy-vline 
WA_PTWTAXITEMREV_STR-TAXCATEGORY sy-vline 
WA_PTWTAXITEMREV_STR-DEDUCTIONTYPE sy-vline 
WA_PTWTAXITEMREV_STR-DOCUMENTDATE sy-vline 
WA_PTWTAXITEMREV_STR-POSTINGDATE sy-vline 
WA_PTWTAXITEMREV_STR-REPORTINGDATE sy-vline 
WA_PTWTAXITEMREV_STR-TAXREPORTINGDATE sy-vline 
WA_PTWTAXITEMREV_STR-TAXCODE sy-vline 
WA_PTWTAXITEMREV_STR-DOCUMENTREFERENCEID sy-vline 
WA_PTWTAXITEMREV_STR-CUSTOMER sy-vline 
WA_PTWTAXITEMREV_STR-SUPPLIER sy-vline 
WA_PTWTAXITEMREV_STR-CUSTOMERCOUNTRY sy-vline 
WA_PTWTAXITEMREV_STR-SUPPLIERCOUNTRY sy-vline 
WA_PTWTAXITEMREV_STR-COMPANYCODECURRENCY sy-vline 
WA_PTWTAXITEMREV_STR-TAXBASEAMOUNTINCOCODECRCY sy-vline 
WA_PTWTAXITEMREV_STR-TAXAMOUNTINCOCODECRCY sy-vline 
WA_PTWTAXITEMREV_STR-ZEROTAXBASEAMOUNTINCOCODECRCY sy-vline 
WA_PTWTAXITEMREV_STR-EXEMPTTAXBASEAMTINCOCODECRCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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