ABAP Select data from SAP table AMI_TRAVEL_PREFERENCE_TYPE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AMI_TRAVEL_PREFERENCE_TYPE
*  INTO TABLE @DATA(IT_AMI_TRAVEL_PREFERENCE_TYPE2).
*--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_AMI_TRAVEL_PREFERENCE_TYPE INDEX 1 INTO DATA(WA_AMI_TRAVEL_PREFERENCE_TYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AMI_TRAVEL_PREFERENCE_TYPE>-CONTROLLER = 1.
<AMI_TRAVEL_PREFERENCE_TYPE>-COMMON_PREF = 1.
<AMI_TRAVEL_PREFERENCE_TYPE>-CONTROLLER = 1.
<AMI_TRAVEL_PREFERENCE_TYPE>-PRIMARY_LANG_ID = 1.
<AMI_TRAVEL_PREFERENCE_TYPE>-CREDIT_CARD_ASSOCIATION_PREF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AMI_TRAVEL_PREFERENCE_TYPE-CONTROLLER, sy-vline,
  WA_AMI_TRAVEL_PREFERENCE_TYPE-AIR, sy-vline,
  WA_AMI_TRAVEL_PREFERENCE_TYPE-CAR, sy-vline,
  WA_AMI_TRAVEL_PREFERENCE_TYPE-HOTEL, sy-vline,
  WA_AMI_TRAVEL_PREFERENCE_TYPE-LCC, sy-vline,
  WA_AMI_TRAVEL_PREFERENCE_TYPE-RAIL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AMI_TRAVEL_PREFERENCE_TYPE 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_AMI_TRAVEL_PREFERENCE_TYPE 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_AMI_TRAVEL_PREFERENCE_TYPE INTO WA_AMI_TRAVEL_PREFERENCE_TYPE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_AMI_TRAVEL_PREFERENCE_TYPE_STR, 
CONTROLLER TYPE STRING,
COMMON_PREF TYPE STRING,
CONTROLLER TYPE STRING,
PRIMARY_LANG_ID TYPE STRING,
CREDIT_CARD_ASSOCIATION_PREF TYPE STRING,
CONTROLLER TYPE STRING,
AIR TYPE STRING,
CAR TYPE STRING,
HOTEL TYPE STRING,
LCC TYPE STRING,
RAIL TYPE STRING,
SITE_CODE TYPE STRING,
AIRLINE_PREF TYPE STRING,
CONTROLLER TYPE STRING,
AIR_PASSENGER_TYPE TYPE STRING,
AIR_SMOKING_INDICATOR TYPE STRING,
AIR_TICKET_DISTRIB_PREF TYPE STRING,
AIR_LOYALTY_PREF TYPE STRING,
AIR_CABIN_PREF TYPE STRING,
AIR_SEAT_PREF TYPE STRING,
AIR_SSRPREF TYPE STRING,
AIRPORT_ORIGIN_PREF TYPE STRING,
AIRPORT_ROUTE_PREF TYPE STRING,
AIR_PAYMENT_FORM_PREF TYPE STRING,
AIR_PAYMENT_FORM_ACCOUNT_NUMBE TYPE STRING,
AIR_DISCOUNT_CARDS TYPE STRING,
AIRPORT_ORIGIN_LOCATION_TYPE_P TYPE STRING,
AIRPORT_ROUTE_LOCATION_TYPE_PR TYPE STRING,
CAR_PREF TYPE STRING,
CONTROLLER TYPE STRING,
CAR_SMOKING_INDICATOR TYPE STRING,
CAR_LOYALTY_PREF TYPE STRING,
CAR_TYPE_PREF TYPE STRING,
CAR_DISCOUNT_CARDS TYPE STRING,
CAR_METHOD_OF_GUARANTEE_PREF TYPE STRING,
HOTEL_PREF TYPE STRING,
CONTROLLER TYPE STRING,
HOTEL_SMOKING_INDICATOR TYPE STRING,
HOTEL_LOYALTY_PREF TYPE STRING,
HOTEL_CLASS_PREF TYPE STRING,
BED_TYPE_PREF TYPE STRING,
HOTEL_PAYMENT_FORM_PREF TYPE STRING,
HOTEL_METHOD_OF_GUARANTEE_PREF TYPE STRING,
OTHER_SRVC_PREF TYPE STRING,
CONTROLLER TYPE STRING,
WEB_BOOKING_PREF TYPE STRING,
CONTROLLER TYPE STRING,
WEB_BOOKING_PAYMENT_FORM_PREF TYPE STRING,
RAIL_PREF TYPE STRING,
CONTROLLER TYPE STRING,
RAIL_SMOKING_INDICATOR TYPE STRING,
RAIL_CLASS_PREF TYPE STRING,
RAIL_CAR_TYPE_PREF TYPE STRING,
RAIL_CAR_NUMBER_PREF TYPE STRING,
RAIL_ZONE_CODE_PREF TYPE STRING,
RAIL_WAGON_CODE_PREF TYPE STRING,
RAIL_ORIGIN_STATION_PREF TYPE STRING,
RAIL_PAYMENT_FORM_PREF TYPE STRING,
RAIL_DELIVERY_METHOD_PREF TYPE STRING,
RAIL_SEAT_TYPE TYPE STRING,
RAIL_SEAT_PREF TYPE STRING,
RAIL_SEAT_OPTION_PREF TYPE STRING,
RAIL_SEAT_NUMBER_PREF TYPE STRING,
RAIL_BERTH_LEVEL_PREF TYPE STRING,
RAIL_BERTH_COMPARTMENT_PREF TYPE STRING,
RAIL_LOYALTY_PREF TYPE STRING,
RAIL_DISCOUNT_CARDS TYPE STRING,
RAIL_DOCUMENTS_PREF TYPE STRING,
SPECIAL_REQUEST_PREF TYPE STRING,
INTEGRATED_PARTNER_PREF TYPE STRING,
UPDATE_CARDS_WITH_OVERRIDE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AMI_TRAVEL_PREFERENCE_TYPE_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_AMI_TRAVEL_PREFERENCE_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-COMMON_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-PRIMARY_LANG_ID sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CREDIT_CARD_ASSOCIATION_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CAR sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-HOTEL sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-LCC sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-SITE_CODE sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIRLINE_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_PASSENGER_TYPE sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_SMOKING_INDICATOR sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_TICKET_DISTRIB_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_LOYALTY_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_CABIN_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_SEAT_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_SSRPREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIRPORT_ORIGIN_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIRPORT_ROUTE_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_PAYMENT_FORM_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_PAYMENT_FORM_ACCOUNT_NUMBE sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIR_DISCOUNT_CARDS sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIRPORT_ORIGIN_LOCATION_TYPE_P sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-AIRPORT_ROUTE_LOCATION_TYPE_PR sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CAR_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CAR_SMOKING_INDICATOR sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CAR_LOYALTY_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CAR_TYPE_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CAR_DISCOUNT_CARDS sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CAR_METHOD_OF_GUARANTEE_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-HOTEL_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-HOTEL_SMOKING_INDICATOR sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-HOTEL_LOYALTY_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-HOTEL_CLASS_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-BED_TYPE_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-HOTEL_PAYMENT_FORM_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-HOTEL_METHOD_OF_GUARANTEE_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-OTHER_SRVC_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-WEB_BOOKING_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-WEB_BOOKING_PAYMENT_FORM_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_SMOKING_INDICATOR sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_CLASS_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_CAR_TYPE_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_CAR_NUMBER_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_ZONE_CODE_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_WAGON_CODE_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_ORIGIN_STATION_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_PAYMENT_FORM_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_DELIVERY_METHOD_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_SEAT_TYPE sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_SEAT_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_SEAT_OPTION_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_SEAT_NUMBER_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_BERTH_LEVEL_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_BERTH_COMPARTMENT_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_LOYALTY_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_DISCOUNT_CARDS sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-RAIL_DOCUMENTS_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-SPECIAL_REQUEST_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-INTEGRATED_PARTNER_PREF sy-vline 
WA_AMI_TRAVEL_PREFERENCE_TYPE_STR-UPDATE_CARDS_WITH_OVERRIDE sy-vline      INTO ld_text SEPARATED BY SPACE.

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