ABAP Select data from SAP table TAX_LINE_INPUT_VAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TAX_LINE_INPUT_VAT
*  INTO TABLE @DATA(IT_TAX_LINE_INPUT_VAT2).
*--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_TAX_LINE_INPUT_VAT INDEX 1 INTO DATA(WA_TAX_LINE_INPUT_VAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TAX_LINE_INPUT_VAT>-SRLNO = 1.
<TAX_LINE_INPUT_VAT>-BUKRS = 1.
<TAX_LINE_INPUT_VAT>-BELNR = 1.
<TAX_LINE_INPUT_VAT>-GJAHR = 1.
<TAX_LINE_INPUT_VAT>-MONAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TAX_LINE_INPUT_VAT-BLDAT, sy-vline,
  WA_TAX_LINE_INPUT_VAT-LIFNR, sy-vline,
  WA_TAX_LINE_INPUT_VAT-SERNUM, sy-vline,
  WA_TAX_LINE_INPUT_VAT-SEQNUM, sy-vline,
  WA_TAX_LINE_INPUT_VAT-NAME1, sy-vline,
  WA_TAX_LINE_INPUT_VAT-NAME2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TAX_LINE_INPUT_VAT 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_TAX_LINE_INPUT_VAT 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_TAX_LINE_INPUT_VAT INTO WA_TAX_LINE_INPUT_VAT.


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

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

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

*Conversion exit AC152, internal->external for field HWBAS
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_TAX_LINE_INPUT_VAT-HWBAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAX_LINE_INPUT_VAT-HWBAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field HWSTE
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_TAX_LINE_INPUT_VAT-HWSTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TAX_LINE_INPUT_VAT-HWSTE.
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_TAX_LINE_INPUT_VAT_STR, 
SRLNO TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
MONAT TYPE STRING,
BLDAT TYPE STRING,
LIFNR TYPE STRING,
SERNUM TYPE STRING,
SEQNUM TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
LAND1 TYPE STRING,
TAXNUM TYPE STRING,
MWSKZ TYPE STRING,
KTOSL TYPE STRING,
MAKTX TYPE STRING,
MENGE TYPE STRING,
HWBAS TYPE STRING,
HWSTE TYPE STRING,
CUS_FRM_NO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TAX_LINE_INPUT_VAT_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_TAX_LINE_INPUT_VAT_STR-SRLNO sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-BUKRS sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-BELNR sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-GJAHR sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-MONAT sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-BLDAT sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-LIFNR sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-SERNUM sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-SEQNUM sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-NAME1 sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-NAME2 sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-LAND1 sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-TAXNUM sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-MWSKZ sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-KTOSL sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-MAKTX sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-MENGE sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-HWBAS sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-HWSTE sy-vline 
WA_TAX_LINE_INPUT_VAT_STR-CUS_FRM_NO sy-vline      INTO ld_text SEPARATED BY SPACE.

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