ABAP Select data from SAP table ISBUSINESSPARTNERWHLDGTAXWD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISBUSINESSPARTNERWHLDGTAXWD
*  INTO TABLE @DATA(IT_ISBUSINESSPARTNERWHLDGTAXWD2).
*--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_ISBUSINESSPARTNERWHLDGTAXWD INDEX 1 INTO DATA(WA_ISBUSINESSPARTNERWHLDGTAXWD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISBUSINESSPARTNERWHLDGTAXWD>-KEY = 1.
<ISBUSINESSPARTNERWHLDGTAXWD>-PARENT_KEY = 1.
<ISBUSINESSPARTNERWHLDGTAXWD>-ROOT_KEY = 1.
<ISBUSINESSPARTNERWHLDGTAXWD>-HASACTIVEENTITY = 1.
<ISBUSINESSPARTNERWHLDGTAXWD>-ACTIVESUPPLIER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISBUSINESSPARTNERWHLDGTAXWD-ACTIVECOMPCODE, sy-vline,
  WA_ISBUSINESSPARTNERWHLDGTAXWD-ACTIVEPARTNERGUID, sy-vline,
  WA_ISBUSINESSPARTNERWHLDGTAXWD-ACTIVEWITHT, sy-vline,
  WA_ISBUSINESSPARTNERWHLDGTAXWD-COUNTRYCODE, sy-vline,
  WA_ISBUSINESSPARTNERWHLDGTAXWD-WITHHOLDINGTAXTYPEFOREDIT, sy-vline,
  WA_ISBUSINESSPARTNERWHLDGTAXWD-WITHHOLDINGTAXTYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISBUSINESSPARTNERWHLDGTAXWD 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_ISBUSINESSPARTNERWHLDGTAXWD 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_ISBUSINESSPARTNERWHLDGTAXWD INTO WA_ISBUSINESSPARTNERWHLDGTAXWD.


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

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

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

*Conversion exit ALPHA, internal->external for field BUSINESSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISBUSINESSPARTNERWHLDGTAXWD-BUSINESSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISBUSINESSPARTNERWHLDGTAXWD-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_ISBUSINESSPARTNERWHLDGTAXWD_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
HASACTIVEENTITY TYPE STRING,
ACTIVESUPPLIER TYPE STRING,
ACTIVECOMPCODE TYPE STRING,
ACTIVEPARTNERGUID TYPE STRING,
ACTIVEWITHT TYPE STRING,
COUNTRYCODE TYPE STRING,
WITHHOLDINGTAXTYPEFOREDIT TYPE STRING,
WITHHOLDINGTAXTYPE TYPE STRING,
WITHHOLDINGTAXCODE TYPE STRING,
ISWITHHOLDINGTAXSUBJECT TYPE STRING,
RECIPIENTTYPE TYPE STRING,
EXEMPTIONDATEBEGIN TYPE STRING,
EXEMPTIONDATEEND TYPE STRING,
EXEMPTIONREASON TYPE STRING,
BUSINESSPARTNERUUID TYPE STRING,
COMPANYCODEFOREDIT TYPE STRING,
COMPANYCODE TYPE STRING,
WITHHOLDINGTAXEXMPTPERCENT TYPE STRING,
WITHHOLDINGTAXCERTIFICATE TYPE STRING,
SUPPLIER TYPE STRING,
BUSINESSPARTNERFOREDIT TYPE STRING,
BUSINESSPARTNER TYPE STRING,
WITHHOLDINGTAXNUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISBUSINESSPARTNERWHLDGTAXWD_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_ISBUSINESSPARTNERWHLDGTAXWD_STR-KEY sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-PARENT_KEY sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-ROOT_KEY sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-HASACTIVEENTITY sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-ACTIVESUPPLIER sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-ACTIVECOMPCODE sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-ACTIVEPARTNERGUID sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-ACTIVEWITHT sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-COUNTRYCODE sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-WITHHOLDINGTAXTYPEFOREDIT sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-WITHHOLDINGTAXTYPE sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-WITHHOLDINGTAXCODE sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-ISWITHHOLDINGTAXSUBJECT sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-RECIPIENTTYPE sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-EXEMPTIONDATEBEGIN sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-EXEMPTIONDATEEND sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-EXEMPTIONREASON sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-BUSINESSPARTNERUUID sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-COMPANYCODEFOREDIT sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-COMPANYCODE sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-WITHHOLDINGTAXEXMPTPERCENT sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-WITHHOLDINGTAXCERTIFICATE sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-SUPPLIER sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-BUSINESSPARTNERFOREDIT sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-BUSINESSPARTNER sy-vline 
WA_ISBUSINESSPARTNERWHLDGTAXWD_STR-WITHHOLDINGTAXNUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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