ABAP Select data from SAP table FTTAX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FTTAX
*  INTO TABLE @DATA(IT_FTTAX2).
*--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_FTTAX INDEX 1 INTO DATA(WA_FTTAX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FTTAX>-FWSTE = 1.
<FTTAX>-MWSKZ = 1.
<FTTAX>-BSCHL = 1.
<FTTAX>-TXJCD = 1.
<FTTAX>-HWSTE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FTTAX-KSCHL, sy-vline,
  WA_FTTAX-H2STE, sy-vline,
  WA_FTTAX-H3STE, sy-vline,
  WA_FTTAX-TXKRS, sy-vline,
  WA_FTTAX-CTXKRS, sy-vline,
  WA_FTTAX-TXDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FTTAX 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_FTTAX 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_FTTAX INTO WA_FTTAX.


*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 EXCRT, internal->external for field TXKRS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_FTTAX-TXKRS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FTTAX-TXKRS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field CTXKRS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_FTTAX-CTXKRS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FTTAX-CTXKRS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIL, internal->external for field PSOSF
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_FTTAX-PSOSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FTTAX-PSOSF.
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_FTTAX_STR, 
FWSTE TYPE STRING,
MWSKZ TYPE STRING,
BSCHL TYPE STRING,
TXJCD TYPE STRING,
HWSTE TYPE STRING,
KSCHL TYPE STRING,
H2STE TYPE STRING,
H3STE TYPE STRING,
TXKRS TYPE STRING,
CTXKRS TYPE STRING,
TXDAT TYPE STRING,
FULFILLDATE TYPE STRING,
SENDE TYPE STRING,
PSOSF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FTTAX_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_FTTAX_STR-FWSTE sy-vline 
WA_FTTAX_STR-MWSKZ sy-vline 
WA_FTTAX_STR-BSCHL sy-vline 
WA_FTTAX_STR-TXJCD sy-vline 
WA_FTTAX_STR-HWSTE sy-vline 
WA_FTTAX_STR-KSCHL sy-vline 
WA_FTTAX_STR-H2STE sy-vline 
WA_FTTAX_STR-H3STE sy-vline 
WA_FTTAX_STR-TXKRS sy-vline 
WA_FTTAX_STR-CTXKRS sy-vline 
WA_FTTAX_STR-TXDAT sy-vline 
WA_FTTAX_STR-FULFILLDATE sy-vline 
WA_FTTAX_STR-SENDE sy-vline 
WA_FTTAX_STR-PSOSF sy-vline      INTO ld_text SEPARATED BY SPACE.

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