ABAP Select data from SAP table FIWTES_S_M123_REC2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FIWTES_S_M123_REC2 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_M123_REC2. 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_M123_REC2 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_M123_REC2 TYPE STANDARD TABLE OF FIWTES_S_M123_REC2,
      WA_FIWTES_S_M123_REC2 TYPE FIWTES_S_M123_REC2,
      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_M123_REC2> TYPE FIWTES_S_M123_REC2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FIWTES_S_M123_REC2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FIWTES_S_M123_REC2
  INTO TABLE IT_FIWTES_S_M123_REC2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIWTES_S_M123_REC2
*  INTO TABLE @DATA(IT_FIWTES_S_M123_REC22).
*--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_M123_REC2 INDEX 1 INTO DATA(WA_FIWTES_S_M123_REC22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FIWTES_S_M123_REC2 ASSIGNING <FIWTES_S_M123_REC2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIWTES_S_M123_REC2>-START_PAGE = 1.
<FIWTES_S_M123_REC2>-FORM = 1.
<FIWTES_S_M123_REC2>-PAGE = 1.
<FIWTES_S_M123_REC2>-START_PAGE_END_TAG = 1.
<FIWTES_S_M123_REC2>-ADDITIONAL_PAGE = 1.

ENDLOOP.

LOOP AT IT_FIWTES_S_M123_REC2 INTO WA_FIWTES_S_M123_REC2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIWTES_S_M123_REC2-SELF_ASSESSMENT_TYPE, sy-vline,
  WA_FIWTES_S_M123_REC2-WITHHOLDING_AGENT_TAX_ID, sy-vline,
  WA_FIWTES_S_M123_REC2-WITHHOLDING_AGENT_COMPANY_NAME, sy-vline,
  WA_FIWTES_S_M123_REC2-WITHHOLDING_AGENT_NAME, sy-vline,
  WA_FIWTES_S_M123_REC2-REPORTING_YEAR1, sy-vline,
  WA_FIWTES_S_M123_REC2-REPORTING_PERIOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIWTES_S_M123_REC2 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_M123_REC2 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_M123_REC2 INTO WA_FIWTES_S_M123_REC2.


*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_M123_REC2_STR, 
START_PAGE TYPE STRING,
FORM TYPE STRING,
PAGE TYPE STRING,
START_PAGE_END_TAG TYPE STRING,
ADDITIONAL_PAGE TYPE STRING,
SELF_ASSESSMENT_TYPE TYPE STRING,
WITHHOLDING_AGENT_TAX_ID TYPE STRING,
WITHHOLDING_AGENT_COMPANY_NAME TYPE STRING,
WITHHOLDING_AGENT_NAME TYPE STRING,
REPORTING_YEAR1 TYPE STRING,
REPORTING_PERIOD TYPE STRING,
NUM_INCOME_RECIPIENTS_123 TYPE STRING,
WITHHOLDING_TAX_BASE_AMOUNT TYPE STRING,
WITHHELD_AMOUNT_123 TYPE STRING,
INCOME_PREV_REPORTING_YEAR TYPE STRING,
REGULARIZATION TYPE STRING,
WITHHELD_AMT_REGULARIZATION TYPE STRING,
RESULTS_OF_PREV_TAX_RETURN TYPE STRING,
AMOUNT_TO_REMIT TYPE STRING,
COMPLEMENTARY_TAX_RETURN_FLAG TYPE STRING,
PREV_TAX_RET_REGISTRATION_NUM TYPE STRING,
IBAN TYPE STRING,
RESERVED_FOR_TAX_OFFICE TYPE STRING,
ELECTRONIC_SIGNATURE TYPE STRING,
END_OF_PAGE_TAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIWTES_S_M123_REC2_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_M123_REC2_STR-START_PAGE sy-vline 
WA_FIWTES_S_M123_REC2_STR-FORM sy-vline 
WA_FIWTES_S_M123_REC2_STR-PAGE sy-vline 
WA_FIWTES_S_M123_REC2_STR-START_PAGE_END_TAG sy-vline 
WA_FIWTES_S_M123_REC2_STR-ADDITIONAL_PAGE sy-vline 
WA_FIWTES_S_M123_REC2_STR-SELF_ASSESSMENT_TYPE sy-vline 
WA_FIWTES_S_M123_REC2_STR-WITHHOLDING_AGENT_TAX_ID sy-vline 
WA_FIWTES_S_M123_REC2_STR-WITHHOLDING_AGENT_COMPANY_NAME sy-vline 
WA_FIWTES_S_M123_REC2_STR-WITHHOLDING_AGENT_NAME sy-vline 
WA_FIWTES_S_M123_REC2_STR-REPORTING_YEAR1 sy-vline 
WA_FIWTES_S_M123_REC2_STR-REPORTING_PERIOD sy-vline 
WA_FIWTES_S_M123_REC2_STR-NUM_INCOME_RECIPIENTS_123 sy-vline 
WA_FIWTES_S_M123_REC2_STR-WITHHOLDING_TAX_BASE_AMOUNT sy-vline 
WA_FIWTES_S_M123_REC2_STR-WITHHELD_AMOUNT_123 sy-vline 
WA_FIWTES_S_M123_REC2_STR-INCOME_PREV_REPORTING_YEAR sy-vline 
WA_FIWTES_S_M123_REC2_STR-REGULARIZATION sy-vline 
WA_FIWTES_S_M123_REC2_STR-WITHHELD_AMT_REGULARIZATION sy-vline 
WA_FIWTES_S_M123_REC2_STR-RESULTS_OF_PREV_TAX_RETURN sy-vline 
WA_FIWTES_S_M123_REC2_STR-AMOUNT_TO_REMIT sy-vline 
WA_FIWTES_S_M123_REC2_STR-COMPLEMENTARY_TAX_RETURN_FLAG sy-vline 
WA_FIWTES_S_M123_REC2_STR-PREV_TAX_RET_REGISTRATION_NUM sy-vline 
WA_FIWTES_S_M123_REC2_STR-IBAN sy-vline 
WA_FIWTES_S_M123_REC2_STR-RESERVED_FOR_TAX_OFFICE sy-vline 
WA_FIWTES_S_M123_REC2_STR-ELECTRONIC_SIGNATURE sy-vline 
WA_FIWTES_S_M123_REC2_STR-END_OF_PAGE_TAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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