ABAP Select data from SAP table FCOM_S_PL_ROOMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FCOM_S_PL_ROOMS
*  INTO TABLE @DATA(IT_FCOM_S_PL_ROOMS2).
*--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_FCOM_S_PL_ROOMS INDEX 1 INTO DATA(WA_FCOM_S_PL_ROOMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FCOM_S_PL_ROOMS>-ROOMID = 1.
<FCOM_S_PL_ROOMS>-NAME = 1.
<FCOM_S_PL_ROOMS>-OWNER = 1.
<FCOM_S_PL_ROOMS>-DISPNAME = 1.
<FCOM_S_PL_ROOMS>-SCENARIO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FCOM_S_PL_ROOMS-INSTANCE, sy-vline,
  WA_FCOM_S_PL_ROOMS-GJAHR, sy-vline,
  WA_FCOM_S_PL_ROOMS-DRAFTVERSN, sy-vline,
  WA_FCOM_S_PL_ROOMS-FINALVERSN, sy-vline,
  WA_FCOM_S_PL_ROOMS-STARTDATE, sy-vline,
  WA_FCOM_S_PL_ROOMS-DUEDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FCOM_S_PL_ROOMS 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_FCOM_S_PL_ROOMS 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_FCOM_S_PL_ROOMS INTO WA_FCOM_S_PL_ROOMS.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FCOM_S_PL_ROOMS-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOM_S_PL_ROOMS-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DRAFTVERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FCOM_S_PL_ROOMS-DRAFTVERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOM_S_PL_ROOMS-DRAFTVERSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FINALVERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FCOM_S_PL_ROOMS-FINALVERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FCOM_S_PL_ROOMS-FINALVERSN.
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_FCOM_S_PL_ROOMS_STR, 
ROOMID TYPE STRING,
NAME TYPE STRING,
OWNER TYPE STRING,
DISPNAME TYPE STRING,
SCENARIO TYPE STRING,
INSTANCE TYPE STRING,
GJAHR TYPE STRING,
DRAFTVERSN TYPE STRING,
FINALVERSN TYPE STRING,
STARTDATE TYPE STRING,
DUEDATE TYPE STRING,
PHASE1_CNT TYPE STRING,
PHASE2_CNT TYPE STRING,
PHASE3_CNT TYPE STRING,
PHASE4_CNT TYPE STRING,
PHASE1_REL TYPE STRING,
PHASE2_REL TYPE STRING,
PHASE3_REL TYPE STRING,
PHASE4_REL TYPE STRING,
STATUS TYPE STRING,
EXP_CNT TYPE STRING,
ISR_COUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FCOM_S_PL_ROOMS_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_FCOM_S_PL_ROOMS_STR-ROOMID sy-vline 
WA_FCOM_S_PL_ROOMS_STR-NAME sy-vline 
WA_FCOM_S_PL_ROOMS_STR-OWNER sy-vline 
WA_FCOM_S_PL_ROOMS_STR-DISPNAME sy-vline 
WA_FCOM_S_PL_ROOMS_STR-SCENARIO sy-vline 
WA_FCOM_S_PL_ROOMS_STR-INSTANCE sy-vline 
WA_FCOM_S_PL_ROOMS_STR-GJAHR sy-vline 
WA_FCOM_S_PL_ROOMS_STR-DRAFTVERSN sy-vline 
WA_FCOM_S_PL_ROOMS_STR-FINALVERSN sy-vline 
WA_FCOM_S_PL_ROOMS_STR-STARTDATE sy-vline 
WA_FCOM_S_PL_ROOMS_STR-DUEDATE sy-vline 
WA_FCOM_S_PL_ROOMS_STR-PHASE1_CNT sy-vline 
WA_FCOM_S_PL_ROOMS_STR-PHASE2_CNT sy-vline 
WA_FCOM_S_PL_ROOMS_STR-PHASE3_CNT sy-vline 
WA_FCOM_S_PL_ROOMS_STR-PHASE4_CNT sy-vline 
WA_FCOM_S_PL_ROOMS_STR-PHASE1_REL sy-vline 
WA_FCOM_S_PL_ROOMS_STR-PHASE2_REL sy-vline 
WA_FCOM_S_PL_ROOMS_STR-PHASE3_REL sy-vline 
WA_FCOM_S_PL_ROOMS_STR-PHASE4_REL sy-vline 
WA_FCOM_S_PL_ROOMS_STR-STATUS sy-vline 
WA_FCOM_S_PL_ROOMS_STR-EXP_CNT sy-vline 
WA_FCOM_S_PL_ROOMS_STR-ISR_COUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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