ABAP Select data from SAP table FAR_KEY_CUSTOMER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FAR_KEY_CUSTOMER
*  INTO TABLE @DATA(IT_FAR_KEY_CUSTOMER2).
*--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_FAR_KEY_CUSTOMER INDEX 1 INTO DATA(WA_FAR_KEY_CUSTOMER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FAR_KEY_CUSTOMER>-CNUMBER = 1.
<FAR_KEY_CUSTOMER>-COMPANY_CODE = 1.
<FAR_KEY_CUSTOMER>-NAME = 1.
<FAR_KEY_CUSTOMER>-CREDIT_UTILIZATION = 1.
<FAR_KEY_CUSTOMER>-OVERDUE_AMOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FAR_KEY_CUSTOMER-CURRENCY, sy-vline,
  WA_FAR_KEY_CUSTOMER-DSO, sy-vline,
  WA_FAR_KEY_CUSTOMER-DSO_TREND, sy-vline,
  WA_FAR_KEY_CUSTOMER-DSO_WARNING, sy-vline,
  WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_1, sy-vline,
  WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FAR_KEY_CUSTOMER 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_FAR_KEY_CUSTOMER 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_FAR_KEY_CUSTOMER INTO WA_FAR_KEY_CUSTOMER.


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

*Conversion exit AC152, internal->external for field OVERDUE_AMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FAR_KEY_CUSTOMER-OVERDUE_AMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAR_KEY_CUSTOMER-OVERDUE_AMOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field OVERDUE_PERIOD_1
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field OVERDUE_PERIOD_2
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field OVERDUE_PERIOD_3
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field OVERDUE_PERIOD_4
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAR_KEY_CUSTOMER-OVERDUE_PERIOD_4.
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_FAR_KEY_CUSTOMER_STR, 
CNUMBER TYPE STRING,
COMPANY_CODE TYPE STRING,
NAME TYPE STRING,
CREDIT_UTILIZATION TYPE STRING,
OVERDUE_AMOUNT TYPE STRING,
CURRENCY TYPE STRING,
DSO TYPE STRING,
DSO_TREND TYPE STRING,
DSO_WARNING TYPE STRING,
OVERDUE_PERIOD_1 TYPE STRING,
OVERDUE_PERIOD_2 TYPE STRING,
OVERDUE_PERIOD_3 TYPE STRING,
OVERDUE_PERIOD_4 TYPE STRING,
SEGMENT TYPE STRING,
CONTACT_NAME TYPE STRING,
PHONE_NUMBER TYPE STRING,
CONTACT_FAX TYPE STRING,
CONTACT_INTERNET TYPE STRING,
CONTACT_COMPANY TYPE STRING,
CONTACT_COUNTRY TYPE STRING,
CONTACT_CITY TYPE STRING,
CONTACT_ADDRESS TYPE STRING,
FAR_DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FAR_KEY_CUSTOMER_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_FAR_KEY_CUSTOMER_STR-CNUMBER sy-vline 
WA_FAR_KEY_CUSTOMER_STR-COMPANY_CODE sy-vline 
WA_FAR_KEY_CUSTOMER_STR-NAME sy-vline 
WA_FAR_KEY_CUSTOMER_STR-CREDIT_UTILIZATION sy-vline 
WA_FAR_KEY_CUSTOMER_STR-OVERDUE_AMOUNT sy-vline 
WA_FAR_KEY_CUSTOMER_STR-CURRENCY sy-vline 
WA_FAR_KEY_CUSTOMER_STR-DSO sy-vline 
WA_FAR_KEY_CUSTOMER_STR-DSO_TREND sy-vline 
WA_FAR_KEY_CUSTOMER_STR-DSO_WARNING sy-vline 
WA_FAR_KEY_CUSTOMER_STR-OVERDUE_PERIOD_1 sy-vline 
WA_FAR_KEY_CUSTOMER_STR-OVERDUE_PERIOD_2 sy-vline 
WA_FAR_KEY_CUSTOMER_STR-OVERDUE_PERIOD_3 sy-vline 
WA_FAR_KEY_CUSTOMER_STR-OVERDUE_PERIOD_4 sy-vline 
WA_FAR_KEY_CUSTOMER_STR-SEGMENT sy-vline 
WA_FAR_KEY_CUSTOMER_STR-CONTACT_NAME sy-vline 
WA_FAR_KEY_CUSTOMER_STR-PHONE_NUMBER sy-vline 
WA_FAR_KEY_CUSTOMER_STR-CONTACT_FAX sy-vline 
WA_FAR_KEY_CUSTOMER_STR-CONTACT_INTERNET sy-vline 
WA_FAR_KEY_CUSTOMER_STR-CONTACT_COMPANY sy-vline 
WA_FAR_KEY_CUSTOMER_STR-CONTACT_COUNTRY sy-vline 
WA_FAR_KEY_CUSTOMER_STR-CONTACT_CITY sy-vline 
WA_FAR_KEY_CUSTOMER_STR-CONTACT_ADDRESS sy-vline 
WA_FAR_KEY_CUSTOMER_STR-FAR_DUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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