ABAP Select data from SAP table FIWTES_S_M216_SELF_ASSESSMENT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP FIWTES_S_M216_SELF_ASSESSMENT 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 FIWTES_S_M216_SELF_ASSESSMENT. 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 FIWTES_S_M216_SELF_ASSESSMENT 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_FIWTES_S_M216_SELF_ASSESSMENT TYPE STANDARD TABLE OF FIWTES_S_M216_SELF_ASSESSMENT,
      WA_FIWTES_S_M216_SELF_ASSESSMENT TYPE FIWTES_S_M216_SELF_ASSESSMENT,
      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: <FIWTES_S_M216_SELF_ASSESSMENT> TYPE FIWTES_S_M216_SELF_ASSESSMENT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FIWTES_S_M216_SELF_ASSESSMENT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FIWTES_S_M216_SELF_ASSESSMENT
  INTO TABLE IT_FIWTES_S_M216_SELF_ASSESSMENT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIWTES_S_M216_SELF_ASSESSMENT
*  INTO TABLE @DATA(IT_FIWTES_S_M216_SELF_ASSESSMENT2).
*--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_FIWTES_S_M216_SELF_ASSESSMENT INDEX 1 INTO DATA(WA_FIWTES_S_M216_SELF_ASSESSMENT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FIWTES_S_M216_SELF_ASSESSMENT ASSIGNING <FIWTES_S_M216_SELF_ASSESSMENT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIWTES_S_M216_SELF_ASSESSMENT>-OPENINGTAG = 1.
<FIWTES_S_M216_SELF_ASSESSMENT>-FORMCODE = 1.
<FIWTES_S_M216_SELF_ASSESSMENT>-PAGECODE = 1.
<FIWTES_S_M216_SELF_ASSESSMENT>-CLOSINGTAG = 1.
<FIWTES_S_M216_SELF_ASSESSMENT>-COMPLEMENTARYIND = 1.

ENDLOOP.

LOOP AT IT_FIWTES_S_M216_SELF_ASSESSMENT INTO WA_FIWTES_S_M216_SELF_ASSESSMENT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIWTES_S_M216_SELF_ASSESSMENT-SELFASSESSMENTTYPE, sy-vline,
  WA_FIWTES_S_M216_SELF_ASSESSMENT-TAX_ID, sy-vline,
  WA_FIWTES_S_M216_SELF_ASSESSMENT-COMPANYNAME, sy-vline,
  WA_FIWTES_S_M216_SELF_ASSESSMENT-NAME, sy-vline,
  WA_FIWTES_S_M216_SELF_ASSESSMENT-FISCALYEAR, sy-vline,
  WA_FIWTES_S_M216_SELF_ASSESSMENT-PERIOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIWTES_S_M216_SELF_ASSESSMENT 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_FIWTES_S_M216_SELF_ASSESSMENT 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_FIWTES_S_M216_SELF_ASSESSMENT INTO WA_FIWTES_S_M216_SELF_ASSESSMENT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FIWTES_S_M216_SELF_ASSESSMENT_STR, 
OPENINGTAG TYPE STRING,
FORMCODE TYPE STRING,
PAGECODE TYPE STRING,
CLOSINGTAG TYPE STRING,
COMPLEMENTARYIND TYPE STRING,
SELFASSESSMENTTYPE TYPE STRING,
TAX_ID TYPE STRING,
COMPANYNAME TYPE STRING,
NAME TYPE STRING,
FISCALYEAR TYPE STRING,
PERIOD TYPE STRING,
NUMBER_OF_INCOMES TYPE STRING,
TAX_BASE_WHT TYPE STRING,
WITHHELD_AMOUNT TYPE STRING,
NUM_INCOME_NO_WITH TYPE STRING,
TAX_BASE_INCOME_NO_WHT TYPE STRING,
AMOUNT_PREV_REPORT TYPE STRING,
AMOUNT_TO_REMIT TYPE STRING,
DIRECT_DEBIT_IBAN TYPE STRING,
COMPLEMENTARY_TAX_RETURN TYPE STRING,
RECEIPT_NUM_PREV TYPE STRING,
RESERVED_FOR_TAX_OFFICE TYPE STRING,
ELECTRONIC_SIGNATURE TYPE STRING,
END_RECORD_TAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIWTES_S_M216_SELF_ASSESSMENT_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_FIWTES_S_M216_SELF_ASSESSMENT_STR-OPENINGTAG sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-FORMCODE sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-PAGECODE sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-CLOSINGTAG sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-COMPLEMENTARYIND sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-SELFASSESSMENTTYPE sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-TAX_ID sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-COMPANYNAME sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-NAME sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-FISCALYEAR sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-PERIOD sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-NUMBER_OF_INCOMES sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-TAX_BASE_WHT sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-WITHHELD_AMOUNT sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-NUM_INCOME_NO_WITH sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-TAX_BASE_INCOME_NO_WHT sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-AMOUNT_PREV_REPORT sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-AMOUNT_TO_REMIT sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-DIRECT_DEBIT_IBAN sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-COMPLEMENTARY_TAX_RETURN sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-RECEIPT_NUM_PREV sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-RESERVED_FOR_TAX_OFFICE sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-ELECTRONIC_SIGNATURE sy-vline 
WA_FIWTES_S_M216_SELF_ASSESSMENT_STR-END_RECORD_TAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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