ABAP Select data from SAP table FIWTUS_S_1042S_FILE_REC_W into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FIWTUS_S_1042S_FILE_REC_W 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 FIWTUS_S_1042S_FILE_REC_W. 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 FIWTUS_S_1042S_FILE_REC_W 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_FIWTUS_S_1042S_FILE_REC_W TYPE STANDARD TABLE OF FIWTUS_S_1042S_FILE_REC_W,
      WA_FIWTUS_S_1042S_FILE_REC_W TYPE FIWTUS_S_1042S_FILE_REC_W,
      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: <FIWTUS_S_1042S_FILE_REC_W> TYPE FIWTUS_S_1042S_FILE_REC_W.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FIWTUS_S_1042S_FILE_REC_W.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FIWTUS_S_1042S_FILE_REC_W
  INTO TABLE IT_FIWTUS_S_1042S_FILE_REC_W.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIWTUS_S_1042S_FILE_REC_W
*  INTO TABLE @DATA(IT_FIWTUS_S_1042S_FILE_REC_W2).
*--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_FIWTUS_S_1042S_FILE_REC_W INDEX 1 INTO DATA(WA_FIWTUS_S_1042S_FILE_REC_W2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FIWTUS_S_1042S_FILE_REC_W ASSIGNING <FIWTUS_S_1042S_FILE_REC_W>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIWTUS_S_1042S_FILE_REC_W>-RECORD_TYPE = 1.
<FIWTUS_S_1042S_FILE_REC_W>-RETURN_TYPE_IND = 1.
<FIWTUS_S_1042S_FILE_REC_W>-PRO_RATA_BASIS_REP = 1.
<FIWTUS_S_1042S_FILE_REC_W>-WITH_AGENTS_EIN = 1.
<FIWTUS_S_1042S_FILE_REC_W>-WITH_AGENTS_EIN_IN = 1.

ENDLOOP.

LOOP AT IT_FIWTUS_S_1042S_FILE_REC_W INTO WA_FIWTUS_S_1042S_FILE_REC_W.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIWTUS_S_1042S_FILE_REC_W-WITH_AGENTS_NAME_1, sy-vline,
  WA_FIWTUS_S_1042S_FILE_REC_W-WITH_AGENTS_NAME_2, sy-vline,
  WA_FIWTUS_S_1042S_FILE_REC_W-WITH_AGENTS_NAME_3, sy-vline,
  WA_FIWTUS_S_1042S_FILE_REC_W-WITH_AGENTS_STREET1, sy-vline,
  WA_FIWTUS_S_1042S_FILE_REC_W-WITH_AGENTS_STREET2, sy-vline,
  WA_FIWTUS_S_1042S_FILE_REC_W-WITH_AGENTS_CITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIWTUS_S_1042S_FILE_REC_W 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_FIWTUS_S_1042S_FILE_REC_W 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_FIWTUS_S_1042S_FILE_REC_W INTO WA_FIWTUS_S_1042S_FILE_REC_W.


*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_FIWTUS_S_1042S_FILE_REC_W_STR, 
RECORD_TYPE TYPE STRING,
RETURN_TYPE_IND TYPE STRING,
PRO_RATA_BASIS_REP TYPE STRING,
WITH_AGENTS_EIN TYPE STRING,
WITH_AGENTS_EIN_IN TYPE STRING,
WITH_AGENTS_NAME_1 TYPE STRING,
WITH_AGENTS_NAME_2 TYPE STRING,
WITH_AGENTS_NAME_3 TYPE STRING,
WITH_AGENTS_STREET1 TYPE STRING,
WITH_AGENTS_STREET2 TYPE STRING,
WITH_AGENTS_CITY TYPE STRING,
WITH_AGENTS_STATE TYPE STRING,
WITH_AGENTS_PROVIN TYPE STRING,
WITH_AGENTS_CTRY TYPE STRING,
WITH_AGENTS_ZIP_C TYPE STRING,
TAX_YEAR TYPE STRING,
WH_AGENT_CONTACT TYPE STRING,
WH_AGENT_DEPT TYPE STRING,
WITH_AGENTS_PHONE TYPE STRING,
FINAL_RETURN_IND TYPE STRING,
WITHHOLDING_INDICATOR TYPE STRING,
WITHHOLDING_AGENT_GIIN TYPE STRING,
RESERVED TYPE STRING,
CHAPTER_3_STATUS_CODE TYPE STRING,
CHAPTER_4_STATUS_CODE TYPE STRING,
RESERVED1 TYPE STRING,
AMENDED_RET_IND TYPE STRING,
WITHHOLDING_AGENT_FOREIGN_TAX_ TYPE STRING,
RESERVED2 TYPE STRING,
RECORD_SEQUENCE_NO TYPE STRING,
BLANK_OR_CR_LF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIWTUS_S_1042S_FILE_REC_W_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_FIWTUS_S_1042S_FILE_REC_W_STR-RECORD_TYPE sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-RETURN_TYPE_IND sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-PRO_RATA_BASIS_REP sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_EIN sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_EIN_IN sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_NAME_1 sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_NAME_2 sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_NAME_3 sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_STREET1 sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_STREET2 sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_CITY sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_STATE sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_PROVIN sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_CTRY sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_ZIP_C sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-TAX_YEAR sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WH_AGENT_CONTACT sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WH_AGENT_DEPT sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITH_AGENTS_PHONE sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-FINAL_RETURN_IND sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITHHOLDING_INDICATOR sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITHHOLDING_AGENT_GIIN sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-RESERVED sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-CHAPTER_3_STATUS_CODE sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-CHAPTER_4_STATUS_CODE sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-RESERVED1 sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-AMENDED_RET_IND sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-WITHHOLDING_AGENT_FOREIGN_TAX_ sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-RESERVED2 sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-RECORD_SEQUENCE_NO sy-vline 
WA_FIWTUS_S_1042S_FILE_REC_W_STR-BLANK_OR_CR_LF sy-vline      INTO ld_text SEPARATED BY SPACE.

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