ABAP Select data from SAP table FIWTAR_S_CHANGE_BASE_AMOUNT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIWTAR_S_CHANGE_BASE_AMOUNT
*  INTO TABLE @DATA(IT_FIWTAR_S_CHANGE_BASE_AMOUNT2).
*--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_FIWTAR_S_CHANGE_BASE_AMOUNT INDEX 1 INTO DATA(WA_FIWTAR_S_CHANGE_BASE_AMOUNT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIWTAR_S_CHANGE_BASE_AMOUNT>-CLASS = 1.
<FIWTAR_S_CHANGE_BASE_AMOUNT>-OFFNR = 1.
<FIWTAR_S_CHANGE_BASE_AMOUNT>-BELNR = 1.
<FIWTAR_S_CHANGE_BASE_AMOUNT>-GJAHR = 1.
<FIWTAR_S_CHANGE_BASE_AMOUNT>-BUDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIWTAR_S_CHANGE_BASE_AMOUNT-DMBTR, sy-vline,
  WA_FIWTAR_S_CHANGE_BASE_AMOUNT-TXCOD, sy-vline,
  WA_FIWTAR_S_CHANGE_BASE_AMOUNT-QSCOD, sy-vline,
  WA_FIWTAR_S_CHANGE_BASE_AMOUNT-XREVERSAL, sy-vline,
  WA_FIWTAR_S_CHANGE_BASE_AMOUNT-PERCEPTION, sy-vline,
  WA_FIWTAR_S_CHANGE_BASE_AMOUNT-AUGBL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIWTAR_S_CHANGE_BASE_AMOUNT 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_FIWTAR_S_CHANGE_BASE_AMOUNT 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_FIWTAR_S_CHANGE_BASE_AMOUNT INTO WA_FIWTAR_S_CHANGE_BASE_AMOUNT.


*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 GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FIWTAR_S_CHANGE_BASE_AMOUNT-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTAR_S_CHANGE_BASE_AMOUNT-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field DMBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_FIWTAR_S_CHANGE_BASE_AMOUNT-DMBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTAR_S_CHANGE_BASE_AMOUNT-DMBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUGBL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FIWTAR_S_CHANGE_BASE_AMOUNT-AUGBL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTAR_S_CHANGE_BASE_AMOUNT-AUGBL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field HWBAS
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_FIWTAR_S_CHANGE_BASE_AMOUNT-HWBAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTAR_S_CHANGE_BASE_AMOUNT-HWBAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field HWSTE
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_FIWTAR_S_CHANGE_BASE_AMOUNT-HWSTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTAR_S_CHANGE_BASE_AMOUNT-HWSTE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FIWTAR_S_CHANGE_BASE_AMOUNT-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIWTAR_S_CHANGE_BASE_AMOUNT-HKONT.
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_FIWTAR_S_CHANGE_BASE_AMOUNT_STR, 
CLASS TYPE STRING,
OFFNR TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUDAT TYPE STRING,
DMBTR TYPE STRING,
TXCOD TYPE STRING,
QSCOD TYPE STRING,
XREVERSAL TYPE STRING,
PERCEPTION TYPE STRING,
AUGBL TYPE STRING,
TCODE TYPE STRING,
HWBAS TYPE STRING,
FITYP TYPE STRING,
WHSUB TYPE STRING,
HWSTE TYPE STRING,
EXRT TYPE STRING,
EXDF TYPE STRING,
EXDT TYPE STRING,
STCDT TYPE STRING,
STCD1 TYPE STRING,
CTNUM TYPE STRING,
BUTXT TYPE STRING,
GRSUP TYPE STRING,
FPTID TYPE STRING,
CCTID TYPE STRING,
HKONT TYPE STRING,
NAME1 TYPE STRING,
BUKRS TYPE STRING,
DATE TYPE STRING,
POSNEG TYPE STRING,
CANCEL TYPE STRING,
CRLF TYPE STRING,
GV_TXTYPE TYPE STRING,
GV_CODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIWTAR_S_CHANGE_BASE_AMOUNT_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_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-CLASS sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-OFFNR sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-BELNR sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-GJAHR sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-BUDAT sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-DMBTR sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-TXCOD sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-QSCOD sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-XREVERSAL sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-PERCEPTION sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-AUGBL sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-TCODE sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-HWBAS sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-FITYP sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-WHSUB sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-HWSTE sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-EXRT sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-EXDF sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-EXDT sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-STCDT sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-STCD1 sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-CTNUM sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-BUTXT sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-GRSUP sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-FPTID sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-CCTID sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-HKONT sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-NAME1 sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-BUKRS sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-DATE sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-POSNEG sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-CANCEL sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-CRLF sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-GV_TXTYPE sy-vline 
WA_FIWTAR_S_CHANGE_BASE_AMOUNT_STR-GV_CODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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