ABAP Select data from SAP table FWF1A_BSSBSEG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FWF1A_BSSBSEG 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 FWF1A_BSSBSEG. 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 FWF1A_BSSBSEG 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_FWF1A_BSSBSEG TYPE STANDARD TABLE OF FWF1A_BSSBSEG,
      WA_FWF1A_BSSBSEG TYPE FWF1A_BSSBSEG,
      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: <FWF1A_BSSBSEG> TYPE FWF1A_BSSBSEG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FWF1A_BSSBSEG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FWF1A_BSSBSEG
  INTO TABLE IT_FWF1A_BSSBSEG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FWF1A_BSSBSEG
*  INTO TABLE @DATA(IT_FWF1A_BSSBSEG2).
*--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_FWF1A_BSSBSEG INDEX 1 INTO DATA(WA_FWF1A_BSSBSEG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FWF1A_BSSBSEG ASSIGNING <FWF1A_BSSBSEG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FWF1A_BSSBSEG>-VALUATION_AREA = 1.
<FWF1A_BSSBSEG>-ACCOUNTING_CODE = 1.
<FWF1A_BSSBSEG>-PRODUCT_CAT = 1.
<FWF1A_BSSBSEG>-PRODUCT_TYPE = 1.
<FWF1A_BSSBSEG>-SECURITY_ACCOUNT = 1.

ENDLOOP.

LOOP AT IT_FWF1A_BSSBSEG INTO WA_FWF1A_BSSBSEG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FWF1A_BSSBSEG-SECURITY_ID, sy-vline,
  WA_FWF1A_BSSBSEG-KONTRAHENT, sy-vline,
  WA_FWF1A_BSSBSEG-ISSUER, sy-vline,
  WA_FWF1A_BSSBSEG-PORTFOLIO, sy-vline,
  WA_FWF1A_BSSBSEG-TRADER, sy-vline,
  WA_FWF1A_BSSBSEG-ACCOUNT_GROUP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FWF1A_BSSBSEG 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_FWF1A_BSSBSEG 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_FWF1A_BSSBSEG INTO WA_FWF1A_BSSBSEG.


*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 SECURITY_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FWF1A_BSSBSEG-SECURITY_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FWF1A_BSSBSEG-SECURITY_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KONTRAHENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FWF1A_BSSBSEG-KONTRAHENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FWF1A_BSSBSEG-KONTRAHENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ISSUER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FWF1A_BSSBSEG-ISSUER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FWF1A_BSSBSEG-ISSUER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOANS_CONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FWF1A_BSSBSEG-LOANS_CONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FWF1A_BSSBSEG-LOANS_CONTRACT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DEAL_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FWF1A_BSSBSEG-DEAL_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FWF1A_BSSBSEG-DEAL_NR.
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_FWF1A_BSSBSEG_STR, 
VALUATION_AREA TYPE STRING,
ACCOUNTING_CODE TYPE STRING,
PRODUCT_CAT TYPE STRING,
PRODUCT_TYPE TYPE STRING,
SECURITY_ACCOUNT TYPE STRING,
SECURITY_ID TYPE STRING,
KONTRAHENT TYPE STRING,
ISSUER TYPE STRING,
PORTFOLIO TYPE STRING,
TRADER TYPE STRING,
ACCOUNT_GROUP TYPE STRING,
LOANS_CONTRACT TYPE STRING,
DEAL_NR TYPE STRING,
POSITION_ACCOUNT TYPE STRING,
BUS_TRANS_ID TYPE STRING,
REF_BUS_TRANS_ID TYPE STRING,
BUS_TRANS_CAT TYPE STRING,
DIST_FLOWTYPE TYPE STRING,
NOMINAL_CURR TYPE STRING,
NOMINAL_AMT TYPE STRING,
NOMINAL_ORG_AMT TYPE STRING,
UNITS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FWF1A_BSSBSEG_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_FWF1A_BSSBSEG_STR-VALUATION_AREA sy-vline 
WA_FWF1A_BSSBSEG_STR-ACCOUNTING_CODE sy-vline 
WA_FWF1A_BSSBSEG_STR-PRODUCT_CAT sy-vline 
WA_FWF1A_BSSBSEG_STR-PRODUCT_TYPE sy-vline 
WA_FWF1A_BSSBSEG_STR-SECURITY_ACCOUNT sy-vline 
WA_FWF1A_BSSBSEG_STR-SECURITY_ID sy-vline 
WA_FWF1A_BSSBSEG_STR-KONTRAHENT sy-vline 
WA_FWF1A_BSSBSEG_STR-ISSUER sy-vline 
WA_FWF1A_BSSBSEG_STR-PORTFOLIO sy-vline 
WA_FWF1A_BSSBSEG_STR-TRADER sy-vline 
WA_FWF1A_BSSBSEG_STR-ACCOUNT_GROUP sy-vline 
WA_FWF1A_BSSBSEG_STR-LOANS_CONTRACT sy-vline 
WA_FWF1A_BSSBSEG_STR-DEAL_NR sy-vline 
WA_FWF1A_BSSBSEG_STR-POSITION_ACCOUNT sy-vline 
WA_FWF1A_BSSBSEG_STR-BUS_TRANS_ID sy-vline 
WA_FWF1A_BSSBSEG_STR-REF_BUS_TRANS_ID sy-vline 
WA_FWF1A_BSSBSEG_STR-BUS_TRANS_CAT sy-vline 
WA_FWF1A_BSSBSEG_STR-DIST_FLOWTYPE sy-vline 
WA_FWF1A_BSSBSEG_STR-NOMINAL_CURR sy-vline 
WA_FWF1A_BSSBSEG_STR-NOMINAL_AMT sy-vline 
WA_FWF1A_BSSBSEG_STR-NOMINAL_ORG_AMT sy-vline 
WA_FWF1A_BSSBSEG_STR-UNITS sy-vline      INTO ld_text SEPARATED BY SPACE.

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