ABAP Select data from SAP table POWL_DEMO_FLIGHTS_STY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM POWL_DEMO_FLIGHTS_STY
*  INTO TABLE @DATA(IT_POWL_DEMO_FLIGHTS_STY2).
*--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_POWL_DEMO_FLIGHTS_STY INDEX 1 INTO DATA(WA_POWL_DEMO_FLIGHTS_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<POWL_DEMO_FLIGHTS_STY>-MANDT = 1.
<POWL_DEMO_FLIGHTS_STY>-CARRID = 1.
<POWL_DEMO_FLIGHTS_STY>-CONNID = 1.
<POWL_DEMO_FLIGHTS_STY>-FLDATE = 1.
<POWL_DEMO_FLIGHTS_STY>-PRICE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_POWL_DEMO_FLIGHTS_STY-CURRENCY, sy-vline,
  WA_POWL_DEMO_FLIGHTS_STY-PLANETYPE, sy-vline,
  WA_POWL_DEMO_FLIGHTS_STY-SEATSMAX, sy-vline,
  WA_POWL_DEMO_FLIGHTS_STY-SEATSOCC, sy-vline,
  WA_POWL_DEMO_FLIGHTS_STY-PAYMENTSUM, sy-vline,
  WA_POWL_DEMO_FLIGHTS_STY-SEATSMAX_B, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_POWL_DEMO_FLIGHTS_STY 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_POWL_DEMO_FLIGHTS_STY 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_POWL_DEMO_FLIGHTS_STY INTO WA_POWL_DEMO_FLIGHTS_STY.


*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_POWL_DEMO_FLIGHTS_STY_STR, 
MANDT TYPE STRING,
CARRID TYPE STRING,
CONNID TYPE STRING,
FLDATE TYPE STRING,
PRICE TYPE STRING,
CURRENCY TYPE STRING,
PLANETYPE TYPE STRING,
SEATSMAX TYPE STRING,
SEATSOCC TYPE STRING,
PAYMENTSUM TYPE STRING,
SEATSMAX_B TYPE STRING,
SEATSOCC_B TYPE STRING,
SEATSMAX_F TYPE STRING,
SEATSOCC_F TYPE STRING,
NULL_REF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_POWL_DEMO_FLIGHTS_STY_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_POWL_DEMO_FLIGHTS_STY_STR-MANDT sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-CARRID sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-CONNID sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-FLDATE sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-PRICE sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-CURRENCY sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-PLANETYPE sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-SEATSMAX sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-SEATSOCC sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-PAYMENTSUM sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-SEATSMAX_B sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-SEATSOCC_B sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-SEATSMAX_F sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-SEATSOCC_F sy-vline 
WA_POWL_DEMO_FLIGHTS_STY_STR-NULL_REF sy-vline      INTO ld_text SEPARATED BY SPACE.

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