ABAP Select data from SAP table ESI_FLIGHT_PLAN_ROOT_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESI_FLIGHT_PLAN_ROOT_DATA
*  INTO TABLE @DATA(IT_ESI_FLIGHT_PLAN_ROOT_DATA2).
*--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_ESI_FLIGHT_PLAN_ROOT_DATA INDEX 1 INTO DATA(WA_ESI_FLIGHT_PLAN_ROOT_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESI_FLIGHT_PLAN_ROOT_DATA>-COUNTRYFR = 1.
<ESI_FLIGHT_PLAN_ROOT_DATA>-CITYFROM = 1.
<ESI_FLIGHT_PLAN_ROOT_DATA>-AIRPFROM = 1.
<ESI_FLIGHT_PLAN_ROOT_DATA>-COUNTRYTO = 1.
<ESI_FLIGHT_PLAN_ROOT_DATA>-CITYTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESI_FLIGHT_PLAN_ROOT_DATA-AIRPTO, sy-vline,
  WA_ESI_FLIGHT_PLAN_ROOT_DATA-FLTIME, sy-vline,
  WA_ESI_FLIGHT_PLAN_ROOT_DATA-DEPTIME, sy-vline,
  WA_ESI_FLIGHT_PLAN_ROOT_DATA-ARRTIME, sy-vline,
  WA_ESI_FLIGHT_PLAN_ROOT_DATA-DISTANCE, sy-vline,
  WA_ESI_FLIGHT_PLAN_ROOT_DATA-DISTID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ESI_FLIGHT_PLAN_ROOT_DATA 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_ESI_FLIGHT_PLAN_ROOT_DATA 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_ESI_FLIGHT_PLAN_ROOT_DATA INTO WA_ESI_FLIGHT_PLAN_ROOT_DATA.


*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 SDURA, internal->external for field FLTIME
CALL FUNCTION 'CONVERSION_EXIT_SDURA_OUTPUT'
  EXPORTING
    input =                      WA_ESI_FLIGHT_PLAN_ROOT_DATA-FLTIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESI_FLIGHT_PLAN_ROOT_DATA-FLTIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DISTID
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ESI_FLIGHT_PLAN_ROOT_DATA-DISTID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ESI_FLIGHT_PLAN_ROOT_DATA-DISTID.
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_ESI_FLIGHT_PLAN_ROOT_DATA_STR, 
COUNTRYFR TYPE STRING,
CITYFROM TYPE STRING,
AIRPFROM TYPE STRING,
COUNTRYTO TYPE STRING,
CITYTO TYPE STRING,
AIRPTO TYPE STRING,
FLTIME TYPE STRING,
DEPTIME TYPE STRING,
ARRTIME TYPE STRING,
DISTANCE TYPE STRING,
DISTID TYPE STRING,
FLTYPE TYPE STRING,
PERIOD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ESI_FLIGHT_PLAN_ROOT_DATA_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_ESI_FLIGHT_PLAN_ROOT_DATA_STR-COUNTRYFR sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-CITYFROM sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-AIRPFROM sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-COUNTRYTO sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-CITYTO sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-AIRPTO sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-FLTIME sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-DEPTIME sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-ARRTIME sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-DISTANCE sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-DISTID sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-FLTYPE sy-vline 
WA_ESI_FLIGHT_PLAN_ROOT_DATA_STR-PERIOD sy-vline      INTO ld_text SEPARATED BY SPACE.

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