ABAP Select data from SAP table TSITEM_TYPE_RAIL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TSITEM_TYPE_RAIL
*  INTO TABLE @DATA(IT_TSITEM_TYPE_RAIL2).
*--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_TSITEM_TYPE_RAIL INDEX 1 INTO DATA(WA_TSITEM_TYPE_RAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TSITEM_TYPE_RAIL>-CONTROLLER = 1.
<TSITEM_TYPE_RAIL>-VENDOR = 1.
<TSITEM_TYPE_RAIL>-CONTROLLER = 1.
<TSITEM_TYPE_RAIL>-CODE = 1.
<TSITEM_TYPE_RAIL>-TRAIN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TSITEM_TYPE_RAIL-NUMBER_IN_PARTY, sy-vline,
  WA_TSITEM_TYPE_RAIL-CONTROLLER, sy-vline,
  WA_TSITEM_TYPE_RAIL-RES_BOOK_DESIG_CODE, sy-vline,
  WA_TSITEM_TYPE_RAIL-CONTENT, sy-vline,
  WA_TSITEM_TYPE_RAIL-SPACE_RESERVED, sy-vline,
  WA_TSITEM_TYPE_RAIL-DEPARTURE_LOCATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TSITEM_TYPE_RAIL 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_TSITEM_TYPE_RAIL 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_TSITEM_TYPE_RAIL INTO WA_TSITEM_TYPE_RAIL.


*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_TSITEM_TYPE_RAIL_STR, 
CONTROLLER TYPE STRING,
VENDOR TYPE STRING,
CONTROLLER TYPE STRING,
CODE TYPE STRING,
TRAIN TYPE STRING,
NUMBER_IN_PARTY TYPE STRING,
CONTROLLER TYPE STRING,
RES_BOOK_DESIG_CODE TYPE STRING,
CONTENT TYPE STRING,
SPACE_RESERVED TYPE STRING,
DEPARTURE_LOCATION TYPE STRING,
CONTROLLER TYPE STRING,
POINT TYPE STRING,
LOCATION_NAME TYPE STRING,
DEPARTURE_DATE TYPE STRING,
DEPARTURE_TIME TYPE STRING,
LOCATION_CODE TYPE STRING,
ARRIVAL_LOCATION TYPE STRING,
CONTROLLER TYPE STRING,
POINT TYPE STRING,
LOCATION_NAME TYPE STRING,
ARRIVAL_DATE TYPE STRING,
ARRIVAL_TIME TYPE STRING,
LOCATION_CODE TYPE STRING,
SERVICE_INFORMATION TYPE STRING,
CONTROLLER TYPE STRING,
TEXT TYPE STRING,
TICKET_CONTROL_NUMBER TYPE STRING,
ISSUE_DATE TYPE STRING,
CONFIRMATION_NUMBER TYPE STRING,
MERGED_SEGMENT_IND TYPE STRING,
SNCFINFORMATION TYPE STRING,
CONTROLLER TYPE STRING,
TEXT TYPE STRING,
TEXT TYPE STRING,
SEGMENT_NUMBER TYPE STRING,
TYPE TYPE STRING,
STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TSITEM_TYPE_RAIL_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_TSITEM_TYPE_RAIL_STR-CONTROLLER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-VENDOR sy-vline 
WA_TSITEM_TYPE_RAIL_STR-CONTROLLER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-CODE sy-vline 
WA_TSITEM_TYPE_RAIL_STR-TRAIN sy-vline 
WA_TSITEM_TYPE_RAIL_STR-NUMBER_IN_PARTY sy-vline 
WA_TSITEM_TYPE_RAIL_STR-CONTROLLER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-RES_BOOK_DESIG_CODE sy-vline 
WA_TSITEM_TYPE_RAIL_STR-CONTENT sy-vline 
WA_TSITEM_TYPE_RAIL_STR-SPACE_RESERVED sy-vline 
WA_TSITEM_TYPE_RAIL_STR-DEPARTURE_LOCATION sy-vline 
WA_TSITEM_TYPE_RAIL_STR-CONTROLLER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-POINT sy-vline 
WA_TSITEM_TYPE_RAIL_STR-LOCATION_NAME sy-vline 
WA_TSITEM_TYPE_RAIL_STR-DEPARTURE_DATE sy-vline 
WA_TSITEM_TYPE_RAIL_STR-DEPARTURE_TIME sy-vline 
WA_TSITEM_TYPE_RAIL_STR-LOCATION_CODE sy-vline 
WA_TSITEM_TYPE_RAIL_STR-ARRIVAL_LOCATION sy-vline 
WA_TSITEM_TYPE_RAIL_STR-CONTROLLER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-POINT sy-vline 
WA_TSITEM_TYPE_RAIL_STR-LOCATION_NAME sy-vline 
WA_TSITEM_TYPE_RAIL_STR-ARRIVAL_DATE sy-vline 
WA_TSITEM_TYPE_RAIL_STR-ARRIVAL_TIME sy-vline 
WA_TSITEM_TYPE_RAIL_STR-LOCATION_CODE sy-vline 
WA_TSITEM_TYPE_RAIL_STR-SERVICE_INFORMATION sy-vline 
WA_TSITEM_TYPE_RAIL_STR-CONTROLLER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-TEXT sy-vline 
WA_TSITEM_TYPE_RAIL_STR-TICKET_CONTROL_NUMBER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-ISSUE_DATE sy-vline 
WA_TSITEM_TYPE_RAIL_STR-CONFIRMATION_NUMBER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-MERGED_SEGMENT_IND sy-vline 
WA_TSITEM_TYPE_RAIL_STR-SNCFINFORMATION sy-vline 
WA_TSITEM_TYPE_RAIL_STR-CONTROLLER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-TEXT sy-vline 
WA_TSITEM_TYPE_RAIL_STR-TEXT sy-vline 
WA_TSITEM_TYPE_RAIL_STR-SEGMENT_NUMBER sy-vline 
WA_TSITEM_TYPE_RAIL_STR-TYPE sy-vline 
WA_TSITEM_TYPE_RAIL_STR-STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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