ABAP Select data from SAP table BAPI_FTR_FLOW_CHANGE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_FTR_FLOW_CHANGE
*  INTO TABLE @DATA(IT_BAPI_FTR_FLOW_CHANGE2).
*--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_BAPI_FTR_FLOW_CHANGE INDEX 1 INTO DATA(WA_BAPI_FTR_FLOW_CHANGE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_FTR_FLOW_CHANGE>-FLOW_TYPE = 1.
<BAPI_FTR_FLOW_CHANGE>-FLOW_SIGN = 1.
<BAPI_FTR_FLOW_CHANGE>-PAYMENT_DATE = 1.
<BAPI_FTR_FLOW_CHANGE>-PAYMENT_AMOUNT = 1.
<BAPI_FTR_FLOW_CHANGE>-PAYMENT_CUR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_FTR_FLOW_CHANGE-PAYMENT_CUR_ISO, sy-vline,
  WA_BAPI_FTR_FLOW_CHANGE-LOCAL_CUR_RATE, sy-vline,
  WA_BAPI_FTR_FLOW_CHANGE-LOCAL_CUR_AMOUNT, sy-vline,
  WA_BAPI_FTR_FLOW_CHANGE-CURRENT_RATE, sy-vline,
  WA_BAPI_FTR_FLOW_CHANGE-FIXED_RATE, sy-vline,
  WA_BAPI_FTR_FLOW_CHANGE-FIXED_AMOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_FTR_FLOW_CHANGE 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_BAPI_FTR_FLOW_CHANGE 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_BAPI_FTR_FLOW_CHANGE INTO WA_BAPI_FTR_FLOW_CHANGE.


*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 EXCRT, internal->external for field LOCAL_CUR_RATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_FTR_FLOW_CHANGE-LOCAL_CUR_RATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_FTR_FLOW_CHANGE-LOCAL_CUR_RATE.
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_BAPI_FTR_FLOW_CHANGE_STR, 
FLOW_TYPE TYPE STRING,
FLOW_SIGN TYPE STRING,
PAYMENT_DATE TYPE STRING,
PAYMENT_AMOUNT TYPE STRING,
PAYMENT_CUR TYPE STRING,
PAYMENT_CUR_ISO TYPE STRING,
LOCAL_CUR_RATE TYPE STRING,
LOCAL_CUR_AMOUNT TYPE STRING,
CURRENT_RATE TYPE STRING,
FIXED_RATE TYPE STRING,
FIXED_AMOUNT TYPE STRING,
CALC_FROM TYPE STRING,
CALC_FROM_INCL TYPE STRING,
CALC_FROM_MONTH_END TYPE STRING,
CALC_TO TYPE STRING,
CALC_TO_INCL TYPE STRING,
CALC_TO_MONTH_END TYPE STRING,
INTEREST_CALC_METHOD TYPE STRING,
INTEREST_CALC_EXPON TYPE STRING,
INTEREST_CALENDAR TYPE STRING,
CALC_BASE_DAYS TYPE STRING,
CALC_BASE_AMOUNT TYPE STRING,
CALC_BASE_CUR TYPE STRING,
CALC_BASE_CUR_ISO TYPE STRING,
PERCENTAGE_RATE TYPE STRING,
ASSIGNMENT TYPE STRING,
CALC_DATE TYPE STRING,
NOMINAL_AMOUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_FTR_FLOW_CHANGE_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_BAPI_FTR_FLOW_CHANGE_STR-FLOW_TYPE sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-FLOW_SIGN sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-PAYMENT_DATE sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-PAYMENT_AMOUNT sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-PAYMENT_CUR sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-PAYMENT_CUR_ISO sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-LOCAL_CUR_RATE sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-LOCAL_CUR_AMOUNT sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CURRENT_RATE sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-FIXED_RATE sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-FIXED_AMOUNT sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_FROM sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_FROM_INCL sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_FROM_MONTH_END sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_TO sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_TO_INCL sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_TO_MONTH_END sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-INTEREST_CALC_METHOD sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-INTEREST_CALC_EXPON sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-INTEREST_CALENDAR sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_BASE_DAYS sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_BASE_AMOUNT sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_BASE_CUR sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_BASE_CUR_ISO sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-PERCENTAGE_RATE sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-ASSIGNMENT sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-CALC_DATE sy-vline 
WA_BAPI_FTR_FLOW_CHANGE_STR-NOMINAL_AMOUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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