ABAP Select data from SAP table FIWTIN_WTAX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIWTIN_WTAX
*  INTO TABLE @DATA(IT_FIWTIN_WTAX2).
*--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_FIWTIN_WTAX INDEX 1 INTO DATA(WA_FIWTIN_WTAX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIWTIN_WTAX>-BUKRS = 1.
<FIWTIN_WTAX>-BELNR = 1.
<FIWTIN_WTAX>-GJAHR = 1.
<FIWTIN_WTAX>-BUZEI = 1.
<FIWTIN_WTAX>-WITHT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIWTIN_WTAX-WT_WITHCD, sy-vline,
  WA_FIWTIN_WTAX-QSCOD, sy-vline,
  WA_FIWTIN_WTAX-WT_QSSHH, sy-vline,
  WA_FIWTIN_WTAX-WT_QSSHB, sy-vline,
  WA_FIWTIN_WTAX-WT_QSSH2, sy-vline,
  WA_FIWTIN_WTAX-WT_QSSH3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIWTIN_WTAX 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_FIWTIN_WTAX 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_FIWTIN_WTAX INTO WA_FIWTIN_WTAX.


*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_FIWTIN_WTAX-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTIN_WTAX-BELNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit AC152, internal->external for field WT_QSSH2
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FIWTIN_WTAX-WT_QSSH2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTIN_WTAX-WT_QSSH2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WT_QSSH3
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FIWTIN_WTAX-WT_QSSH3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTIN_WTAX-WT_QSSH3.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit AC152, internal->external for field WT_QBSH2
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FIWTIN_WTAX-WT_QBSH2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTIN_WTAX-WT_QBSH2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WT_QBSH3
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FIWTIN_WTAX-WT_QBSH3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTIN_WTAX-WT_QBSH3.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FIWTIN_WTAX-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTIN_WTAX-PRCTR.
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_FIWTIN_WTAX_STR, 
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
WITHT TYPE STRING,
WT_WITHCD TYPE STRING,
QSCOD TYPE STRING,
WT_QSSHH TYPE STRING,
WT_QSSHB TYPE STRING,
WT_QSSH2 TYPE STRING,
WT_QSSH3 TYPE STRING,
WT_QBSHH TYPE STRING,
WT_QBSHB TYPE STRING,
WT_QBSH2 TYPE STRING,
WT_QBSH3 TYPE STRING,
WT_QBSHHA TYPE STRING,
WT_QBSHHB TYPE STRING,
WT_AMNMAN TYPE STRING,
HKONT TYPE STRING,
HKONT_OPP TYPE STRING,
AUGBL TYPE STRING,
AUGDT TYPE STRING,
WT_QSZRT TYPE STRING,
QSATZ TYPE STRING,
QSREC TYPE STRING,
WT_GRUWTPD TYPE STRING,
WT_OPOWTPD TYPE STRING,
J_1IINTCHLN TYPE STRING,
WT_WTRD TYPE STRING,
BUPLA TYPE STRING,
SECCO TYPE STRING,
PRCTR TYPE STRING,
WT_BASMAN TYPE STRING,
J_1IEWTREC TYPE STRING,
WT_ACCO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIWTIN_WTAX_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_FIWTIN_WTAX_STR-BUKRS sy-vline 
WA_FIWTIN_WTAX_STR-BELNR sy-vline 
WA_FIWTIN_WTAX_STR-GJAHR sy-vline 
WA_FIWTIN_WTAX_STR-BUZEI sy-vline 
WA_FIWTIN_WTAX_STR-WITHT sy-vline 
WA_FIWTIN_WTAX_STR-WT_WITHCD sy-vline 
WA_FIWTIN_WTAX_STR-QSCOD sy-vline 
WA_FIWTIN_WTAX_STR-WT_QSSHH sy-vline 
WA_FIWTIN_WTAX_STR-WT_QSSHB sy-vline 
WA_FIWTIN_WTAX_STR-WT_QSSH2 sy-vline 
WA_FIWTIN_WTAX_STR-WT_QSSH3 sy-vline 
WA_FIWTIN_WTAX_STR-WT_QBSHH sy-vline 
WA_FIWTIN_WTAX_STR-WT_QBSHB sy-vline 
WA_FIWTIN_WTAX_STR-WT_QBSH2 sy-vline 
WA_FIWTIN_WTAX_STR-WT_QBSH3 sy-vline 
WA_FIWTIN_WTAX_STR-WT_QBSHHA sy-vline 
WA_FIWTIN_WTAX_STR-WT_QBSHHB sy-vline 
WA_FIWTIN_WTAX_STR-WT_AMNMAN sy-vline 
WA_FIWTIN_WTAX_STR-HKONT sy-vline 
WA_FIWTIN_WTAX_STR-HKONT_OPP sy-vline 
WA_FIWTIN_WTAX_STR-AUGBL sy-vline 
WA_FIWTIN_WTAX_STR-AUGDT sy-vline 
WA_FIWTIN_WTAX_STR-WT_QSZRT sy-vline 
WA_FIWTIN_WTAX_STR-QSATZ sy-vline 
WA_FIWTIN_WTAX_STR-QSREC sy-vline 
WA_FIWTIN_WTAX_STR-WT_GRUWTPD sy-vline 
WA_FIWTIN_WTAX_STR-WT_OPOWTPD sy-vline 
WA_FIWTIN_WTAX_STR-J_1IINTCHLN sy-vline 
WA_FIWTIN_WTAX_STR-WT_WTRD sy-vline 
WA_FIWTIN_WTAX_STR-BUPLA sy-vline 
WA_FIWTIN_WTAX_STR-SECCO sy-vline 
WA_FIWTIN_WTAX_STR-PRCTR sy-vline 
WA_FIWTIN_WTAX_STR-WT_BASMAN sy-vline 
WA_FIWTIN_WTAX_STR-J_1IEWTREC sy-vline 
WA_FIWTIN_WTAX_STR-WT_ACCO sy-vline      INTO ld_text SEPARATED BY SPACE.

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