ABAP Select data from SAP table CTWFATAXQUERY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CTWFATAXQUERY
*  INTO TABLE @DATA(IT_CTWFATAXQUERY2).
*--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_CTWFATAXQUERY INDEX 1 INTO DATA(WA_CTWFATAXQUERY2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CTWFATAXQUERY-ACCOUNTINGDOCUMENTITEM, sy-vline,
  WA_CTWFATAXQUERY-TAXGROUP, sy-vline,
  WA_CTWFATAXQUERY-TAIWANESECALENDARYEAR, sy-vline,
  WA_CTWFATAXQUERY-FISCALPERIOD, sy-vline,
  WA_CTWFATAXQUERY-DISTRICTTAXOFFICE, sy-vline,
  WA_CTWFATAXQUERY-SUPPLIERTAXID1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CTWFATAXQUERY 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_CTWFATAXQUERY 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_CTWFATAXQUERY INTO WA_CTWFATAXQUERY.


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

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

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

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

*Conversion exit ALPHA, internal->external for field CUSTOMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CTWFATAXQUERY-CUSTOMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CTWFATAXQUERY-CUSTOMER.
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_CTWFATAXQUERY_STR, 
MANDT TYPE STRING,
ACCOUNTINGDOCUMENT TYPE STRING,
COMPANYCODE TYPE STRING,
FISCALYEAR TYPE STRING,
TAXITEMGROUP TYPE STRING,
ACCOUNTINGDOCUMENTITEM TYPE STRING,
TAXGROUP TYPE STRING,
TAIWANESECALENDARYEAR TYPE STRING,
FISCALPERIOD TYPE STRING,
DISTRICTTAXOFFICE TYPE STRING,
SUPPLIERTAXID1 TYPE STRING,
SUPPLIERTAXID2 TYPE STRING,
DOCUMENTDATE TYPE STRING,
POSTINGDATE TYPE STRING,
REPORTINGDATE TYPE STRING,
DISPLAYDOCUMENTDATE TYPE STRING,
DOCUMENTREFERENCEID TYPE STRING,
FIXEDASSETDESCRIPTION TYPE STRING,
QUANTITY TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
AMOUNTINCOMPANYCODECURRENCY TYPE STRING,
TAXAMOUNTINCOCODECRCY TYPE STRING,
ASSETADDITIONALDESCRIPTION TYPE STRING,
TAXAMOUNT TYPE STRING,
BUSINESSPLACE TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERCOUNTRY TYPE STRING,
CUSTOMER TYPE STRING,
CUSTOMERCOUNTRY TYPE STRING,
ACCOUNTINGDOCUMENTCLASS TYPE STRING,
TAXCODE TYPE STRING,
TAXRATEVALIDITYSTARTDATE TYPE STRING,
TAXRATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CTWFATAXQUERY_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_CTWFATAXQUERY_STR-MANDT sy-vline 
WA_CTWFATAXQUERY_STR-ACCOUNTINGDOCUMENT sy-vline 
WA_CTWFATAXQUERY_STR-COMPANYCODE sy-vline 
WA_CTWFATAXQUERY_STR-FISCALYEAR sy-vline 
WA_CTWFATAXQUERY_STR-TAXITEMGROUP sy-vline 
WA_CTWFATAXQUERY_STR-ACCOUNTINGDOCUMENTITEM sy-vline 
WA_CTWFATAXQUERY_STR-TAXGROUP sy-vline 
WA_CTWFATAXQUERY_STR-TAIWANESECALENDARYEAR sy-vline 
WA_CTWFATAXQUERY_STR-FISCALPERIOD sy-vline 
WA_CTWFATAXQUERY_STR-DISTRICTTAXOFFICE sy-vline 
WA_CTWFATAXQUERY_STR-SUPPLIERTAXID1 sy-vline 
WA_CTWFATAXQUERY_STR-SUPPLIERTAXID2 sy-vline 
WA_CTWFATAXQUERY_STR-DOCUMENTDATE sy-vline 
WA_CTWFATAXQUERY_STR-POSTINGDATE sy-vline 
WA_CTWFATAXQUERY_STR-REPORTINGDATE sy-vline 
WA_CTWFATAXQUERY_STR-DISPLAYDOCUMENTDATE sy-vline 
WA_CTWFATAXQUERY_STR-DOCUMENTREFERENCEID sy-vline 
WA_CTWFATAXQUERY_STR-FIXEDASSETDESCRIPTION sy-vline 
WA_CTWFATAXQUERY_STR-QUANTITY sy-vline 
WA_CTWFATAXQUERY_STR-COMPANYCODECURRENCY sy-vline 
WA_CTWFATAXQUERY_STR-AMOUNTINCOMPANYCODECURRENCY sy-vline 
WA_CTWFATAXQUERY_STR-TAXAMOUNTINCOCODECRCY sy-vline 
WA_CTWFATAXQUERY_STR-ASSETADDITIONALDESCRIPTION sy-vline 
WA_CTWFATAXQUERY_STR-TAXAMOUNT sy-vline 
WA_CTWFATAXQUERY_STR-BUSINESSPLACE sy-vline 
WA_CTWFATAXQUERY_STR-SUPPLIER sy-vline 
WA_CTWFATAXQUERY_STR-SUPPLIERCOUNTRY sy-vline 
WA_CTWFATAXQUERY_STR-CUSTOMER sy-vline 
WA_CTWFATAXQUERY_STR-CUSTOMERCOUNTRY sy-vline 
WA_CTWFATAXQUERY_STR-ACCOUNTINGDOCUMENTCLASS sy-vline 
WA_CTWFATAXQUERY_STR-TAXCODE sy-vline 
WA_CTWFATAXQUERY_STR-TAXRATEVALIDITYSTARTDATE sy-vline 
WA_CTWFATAXQUERY_STR-TAXRATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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