ABAP Select data from SAP table AMI_TRAIN_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_TRAIN_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_TRAIN_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_TRAIN_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_TRAIN_TYPE TYPE STANDARD TABLE OF AMI_TRAIN_TYPE,
      WA_AMI_TRAIN_TYPE TYPE AMI_TRAIN_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_TRAIN_TYPE> TYPE AMI_TRAIN_TYPE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AMI_TRAIN_TYPE
*  INTO TABLE @DATA(IT_AMI_TRAIN_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_TRAIN_TYPE INDEX 1 INTO DATA(WA_AMI_TRAIN_TYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AMI_TRAIN_TYPE>-CONTROLLER = 1.
<AMI_TRAIN_TYPE>-TYPE = 1.
<AMI_TRAIN_TYPE>-CONTROLLER = 1.
<AMI_TRAIN_TYPE>-TYPE = 1.
<AMI_TRAIN_TYPE>-THIRD_PARTY_INFO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AMI_TRAIN_TYPE-FROM, sy-vline,
  WA_AMI_TRAIN_TYPE-CONTROLLER, sy-vline,
  WA_AMI_TRAIN_TYPE-BASE, sy-vline,
  WA_AMI_TRAIN_TYPE-CONTROLLER, sy-vline,
  WA_AMI_TRAIN_TYPE-LOCATION_CODE, sy-vline,
  WA_AMI_TRAIN_TYPE-CONTROLLER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AMI_TRAIN_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_TRAIN_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_TRAIN_TYPE INTO WA_AMI_TRAIN_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_TRAIN_TYPE_STR, 
CONTROLLER TYPE STRING,
TYPE TYPE STRING,
CONTROLLER TYPE STRING,
TYPE TYPE STRING,
THIRD_PARTY_INFO TYPE STRING,
FROM TYPE STRING,
CONTROLLER TYPE STRING,
BASE TYPE STRING,
CONTROLLER TYPE STRING,
LOCATION_CODE TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
CITY_CODE TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
COUNTRY_CODE TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
STATE_CODE TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
TYPE TYPE STRING,
PLATFORM TYPE STRING,
COMPANY_LOCATION_NAME TYPE STRING,
TO TYPE STRING,
CONTROLLER TYPE STRING,
BASE TYPE STRING,
CONTROLLER TYPE STRING,
LOCATION_CODE TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
CITY_CODE TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
COUNTRY_CODE TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
STATE_CODE TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
TYPE TYPE STRING,
PLATFORM TYPE STRING,
COMPANY_LOCATION_NAME TYPE STRING,
DEPARTURE_DATE_TIME TYPE STRING,
ARRIVAL_DATE_TIME TYPE STRING,
SEGMENT_LIST TYPE STRING,
TOTAL_FARE TYPE STRING,
CONTROLLER TYPE STRING,
BASE TYPE STRING,
CONTROLLER TYPE STRING,
CURRENCY TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
EXCHANGE_RATE TYPE STRING,
AMOUNT TYPE STRING,
TOTAL_AMOUNT TYPE STRING,
RATE_TYPE TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
RATE_SUB_TYPE TYPE STRING,
NEGOCIATED_RATE_CODE TYPE STRING,
CABIN TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
FARE_GROUP TYPE STRING,
TAX_SERVICE_DATA TYPE STRING,
IS_ONLINE_TICKET_ALLOWED TYPE STRING,
NUMBER_OF_TRAVELLERS TYPE STRING,
JUSTIFICATION TYPE STRING,
STATUS TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
NAME TYPE STRING,
CANCELLATION_DATE TYPE STRING,
PERMISSIONS TYPE STRING,
CONTROLLER TYPE STRING,
IS_MODIFICATION_ALLOWED TYPE STRING,
IS_CANCELLATION_ALLOWED TYPE STRING,
IS_DATE_CHANGE_ONLY_ALLOWED TYPE STRING,
TICKETING_ELEMENTS TYPE STRING,
METHOD_OF_TICKETING TYPE STRING,
DELIVERY_INFO TYPE STRING,
CONTROLLER TYPE STRING,
TYPE TYPE STRING,
DOCUMENT_TYPE TYPE STRING,
DOCUMENT_NUMBER TYPE STRING,
BOOKING_CODE TYPE STRING,
CORPORATE_DISCOUNT_NUMBERS TYPE STRING,
FREQUENT_TRAVELLER_NUMBERS TYPE STRING,
ID TYPE STRING,
DURATION TYPE STRING,
IS_RETURN_JOURNEY TYPE STRING,
IS_OUT_OF_POLICY TYPE STRING,
E_TICKETING TYPE STRING,
IS_PAID_BY_CREDIT_CARD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AMI_TRAIN_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_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-TYPE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-TYPE sy-vline 
WA_AMI_TRAIN_TYPE_STR-THIRD_PARTY_INFO sy-vline 
WA_AMI_TRAIN_TYPE_STR-FROM sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-BASE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-LOCATION_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-CITY_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-COUNTRY_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-STATE_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-TYPE sy-vline 
WA_AMI_TRAIN_TYPE_STR-PLATFORM sy-vline 
WA_AMI_TRAIN_TYPE_STR-COMPANY_LOCATION_NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-TO sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-BASE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-LOCATION_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-CITY_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-COUNTRY_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-STATE_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-TYPE sy-vline 
WA_AMI_TRAIN_TYPE_STR-PLATFORM sy-vline 
WA_AMI_TRAIN_TYPE_STR-COMPANY_LOCATION_NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-DEPARTURE_DATE_TIME sy-vline 
WA_AMI_TRAIN_TYPE_STR-ARRIVAL_DATE_TIME sy-vline 
WA_AMI_TRAIN_TYPE_STR-SEGMENT_LIST sy-vline 
WA_AMI_TRAIN_TYPE_STR-TOTAL_FARE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-BASE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CURRENCY sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-EXCHANGE_RATE sy-vline 
WA_AMI_TRAIN_TYPE_STR-AMOUNT sy-vline 
WA_AMI_TRAIN_TYPE_STR-TOTAL_AMOUNT sy-vline 
WA_AMI_TRAIN_TYPE_STR-RATE_TYPE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-RATE_SUB_TYPE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NEGOCIATED_RATE_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CABIN sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-FARE_GROUP sy-vline 
WA_AMI_TRAIN_TYPE_STR-TAX_SERVICE_DATA sy-vline 
WA_AMI_TRAIN_TYPE_STR-IS_ONLINE_TICKET_ALLOWED sy-vline 
WA_AMI_TRAIN_TYPE_STR-NUMBER_OF_TRAVELLERS sy-vline 
WA_AMI_TRAIN_TYPE_STR-JUSTIFICATION sy-vline 
WA_AMI_TRAIN_TYPE_STR-STATUS sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-NAME sy-vline 
WA_AMI_TRAIN_TYPE_STR-CANCELLATION_DATE sy-vline 
WA_AMI_TRAIN_TYPE_STR-PERMISSIONS sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-IS_MODIFICATION_ALLOWED sy-vline 
WA_AMI_TRAIN_TYPE_STR-IS_CANCELLATION_ALLOWED sy-vline 
WA_AMI_TRAIN_TYPE_STR-IS_DATE_CHANGE_ONLY_ALLOWED sy-vline 
WA_AMI_TRAIN_TYPE_STR-TICKETING_ELEMENTS sy-vline 
WA_AMI_TRAIN_TYPE_STR-METHOD_OF_TICKETING sy-vline 
WA_AMI_TRAIN_TYPE_STR-DELIVERY_INFO sy-vline 
WA_AMI_TRAIN_TYPE_STR-CONTROLLER sy-vline 
WA_AMI_TRAIN_TYPE_STR-TYPE sy-vline 
WA_AMI_TRAIN_TYPE_STR-DOCUMENT_TYPE sy-vline 
WA_AMI_TRAIN_TYPE_STR-DOCUMENT_NUMBER sy-vline 
WA_AMI_TRAIN_TYPE_STR-BOOKING_CODE sy-vline 
WA_AMI_TRAIN_TYPE_STR-CORPORATE_DISCOUNT_NUMBERS sy-vline 
WA_AMI_TRAIN_TYPE_STR-FREQUENT_TRAVELLER_NUMBERS sy-vline 
WA_AMI_TRAIN_TYPE_STR-ID sy-vline 
WA_AMI_TRAIN_TYPE_STR-DURATION sy-vline 
WA_AMI_TRAIN_TYPE_STR-IS_RETURN_JOURNEY sy-vline 
WA_AMI_TRAIN_TYPE_STR-IS_OUT_OF_POLICY sy-vline 
WA_AMI_TRAIN_TYPE_STR-E_TICKETING sy-vline 
WA_AMI_TRAIN_TYPE_STR-IS_PAID_BY_CREDIT_CARD sy-vline      INTO ld_text SEPARATED BY SPACE.

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