ABAP Select data from SAP table IWLFSMTDCLSTBKDT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IWLFSMTDCLSTBKDT
*  INTO TABLE @DATA(IT_IWLFSMTDCLSTBKDT2).
*--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_IWLFSMTDCLSTBKDT INDEX 1 INTO DATA(WA_IWLFSMTDCLSTBKDT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IWLFSMTDCLSTBKDT>-MANDT = 1.
<IWLFSMTDCLSTBKDT>-SETTLMTDOCLIST = 1.
<IWLFSMTDCLSTBKDT>-SETTLMTDOCLISTACCTTYPE = 1.
<IWLFSMTDCLSTBKDT>-CREATIONTIME = 1.
<IWLFSMTDCLSTBKDT>-CREATIONDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IWLFSMTDCLSTBKDT-CREATEDBYUSER, sy-vline,
  WA_IWLFSMTDCLSTBKDT-LASTCHANGEDATE, sy-vline,
  WA_IWLFSMTDCLSTBKDT-BANKACCOUNT, sy-vline,
  WA_IWLFSMTDCLSTBKDT-BANKCOUNTRY, sy-vline,
  WA_IWLFSMTDCLSTBKDT-BANKINTERNALID, sy-vline,
  WA_IWLFSMTDCLSTBKDT-BANKCONTROLKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IWLFSMTDCLSTBKDT 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_IWLFSMTDCLSTBKDT 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_IWLFSMTDCLSTBKDT INTO WA_IWLFSMTDCLSTBKDT.


*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 SETTLMTDOCLIST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IWLFSMTDCLSTBKDT-SETTLMTDOCLIST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IWLFSMTDCLSTBKDT-SETTLMTDOCLIST.
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_IWLFSMTDCLSTBKDT_STR, 
MANDT TYPE STRING,
SETTLMTDOCLIST TYPE STRING,
SETTLMTDOCLISTACCTTYPE TYPE STRING,
CREATIONTIME TYPE STRING,
CREATIONDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
BANKACCOUNT TYPE STRING,
BANKCOUNTRY TYPE STRING,
BANKINTERNALID TYPE STRING,
BANKCONTROLKEY TYPE STRING,
BANKACCOUNTREFERENCETEXT TYPE STRING,
DATAEXCHANGEINSTRUCTION TYPE STRING,
DATAEXCHANGEINSTRUCTIONKEY TYPE STRING,
TAXNUMBER1 TYPE STRING,
TAXNUMBER2 TYPE STRING,
TAXNUMBER3 TYPE STRING,
TAXNUMBER4 TYPE STRING,
ISNATURALPERSON TYPE STRING,
VATLIABILITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IWLFSMTDCLSTBKDT_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_IWLFSMTDCLSTBKDT_STR-MANDT sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-SETTLMTDOCLIST sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-SETTLMTDOCLISTACCTTYPE sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-CREATIONTIME sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-CREATIONDATE sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-CREATEDBYUSER sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-LASTCHANGEDATE sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-BANKACCOUNT sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-BANKCOUNTRY sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-BANKINTERNALID sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-BANKCONTROLKEY sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-BANKACCOUNTREFERENCETEXT sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-DATAEXCHANGEINSTRUCTION sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-DATAEXCHANGEINSTRUCTIONKEY sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-TAXNUMBER1 sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-TAXNUMBER2 sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-TAXNUMBER3 sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-TAXNUMBER4 sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-ISNATURALPERSON sy-vline 
WA_IWLFSMTDCLSTBKDT_STR-VATLIABILITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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