ABAP Select data from SAP table FIKZ_S_VAT_CUSTOM_DECL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIKZ_S_VAT_CUSTOM_DECL
*  INTO TABLE @DATA(IT_FIKZ_S_VAT_CUSTOM_DECL2).
*--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_FIKZ_S_VAT_CUSTOM_DECL INDEX 1 INTO DATA(WA_FIKZ_S_VAT_CUSTOM_DECL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIKZ_S_VAT_CUSTOM_DECL>-HEADER = 1.
<FIKZ_S_VAT_CUSTOM_DECL>-COMPANYCODEINN = 1.
<FIKZ_S_VAT_CUSTOM_DECL>-FISCALPERIOD = 1.
<FIKZ_S_VAT_CUSTOM_DECL>-FISCALYEAR = 1.
<FIKZ_S_VAT_CUSTOM_DECL>-TOTAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIKZ_S_VAT_CUSTOM_DECL-LINENUMBER, sy-vline,
  WA_FIKZ_S_VAT_CUSTOM_DECL-LOCALVATAMOUNT, sy-vline,
  WA_FIKZ_S_VAT_CUSTOM_DECL-PAIDVATAMOUNT, sy-vline,
  WA_FIKZ_S_VAT_CUSTOM_DECL-PAIDVATAMOUNTPREV, sy-vline,
  WA_FIKZ_S_VAT_CUSTOM_DECL-VATDEBT, sy-vline,
  WA_FIKZ_S_VAT_CUSTOM_DECL-CURRENCY_CODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIKZ_S_VAT_CUSTOM_DECL 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_FIKZ_S_VAT_CUSTOM_DECL 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_FIKZ_S_VAT_CUSTOM_DECL INTO WA_FIKZ_S_VAT_CUSTOM_DECL.


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

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

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

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

*Conversion exit AC152, internal->external for field VATDEBT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FIKZ_S_VAT_CUSTOM_DECL-VATDEBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIKZ_S_VAT_CUSTOM_DECL-VATDEBT.
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_FIKZ_S_VAT_CUSTOM_DECL_STR, 
HEADER TYPE STRING,
COMPANYCODEINN TYPE STRING,
FISCALPERIOD TYPE STRING,
FISCALYEAR TYPE STRING,
TOTAL TYPE STRING,
LINENUMBER TYPE STRING,
LOCALVATAMOUNT TYPE STRING,
PAIDVATAMOUNT TYPE STRING,
PAIDVATAMOUNTPREV TYPE STRING,
VATDEBT TYPE STRING,
CURRENCY_CODE TYPE STRING,
TABLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIKZ_S_VAT_CUSTOM_DECL_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_FIKZ_S_VAT_CUSTOM_DECL_STR-HEADER sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-COMPANYCODEINN sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-FISCALPERIOD sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-FISCALYEAR sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-TOTAL sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-LINENUMBER sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-LOCALVATAMOUNT sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-PAIDVATAMOUNT sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-PAIDVATAMOUNTPREV sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-VATDEBT sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-CURRENCY_CODE sy-vline 
WA_FIKZ_S_VAT_CUSTOM_DECL_STR-TABLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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