ABAP Select data from SAP table COMT_PARTNER_SCREEN_LAYOUT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COMT_PARTNER_SCREEN_LAYOUT
*  INTO TABLE @DATA(IT_COMT_PARTNER_SCREEN_LAYOUT2).
*--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_COMT_PARTNER_SCREEN_LAYOUT INDEX 1 INTO DATA(WA_COMT_PARTNER_SCREEN_LAYOUT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COMT_PARTNER_SCREEN_LAYOUT>-PARTNERSET = 1.
<COMT_PARTNER_SCREEN_LAYOUT>-SUBSCREEN_ID = 1.
<COMT_PARTNER_SCREEN_LAYOUT>-DESCRIPTION = 1.
<COMT_PARTNER_SCREEN_LAYOUT>-CALLER = 1.
<COMT_PARTNER_SCREEN_LAYOUT>-DOCUMENT_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COMT_PARTNER_SCREEN_LAYOUT-OBJECT_ID, sy-vline,
  WA_COMT_PARTNER_SCREEN_LAYOUT-OBJECT_TYPE, sy-vline,
  WA_COMT_PARTNER_SCREEN_LAYOUT-MASTER_DATA_STRUCTURE, sy-vline,
  WA_COMT_PARTNER_SCREEN_LAYOUT-DETERM_PROC, sy-vline,
  WA_COMT_PARTNER_SCREEN_LAYOUT-SCOPE, sy-vline,
  WA_COMT_PARTNER_SCREEN_LAYOUT-CASH_ON_DELIVERY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COMT_PARTNER_SCREEN_LAYOUT 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_COMT_PARTNER_SCREEN_LAYOUT 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_COMT_PARTNER_SCREEN_LAYOUT INTO WA_COMT_PARTNER_SCREEN_LAYOUT.


*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 ALPHA, internal->external for field OBJECT_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_COMT_PARTNER_SCREEN_LAYOUT-OBJECT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_COMT_PARTNER_SCREEN_LAYOUT-OBJECT_ID.
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_COMT_PARTNER_SCREEN_LAYOUT_STR, 
PARTNERSET TYPE STRING,
SUBSCREEN_ID TYPE STRING,
DESCRIPTION TYPE STRING,
CALLER TYPE STRING,
DOCUMENT_ID TYPE STRING,
OBJECT_ID TYPE STRING,
OBJECT_TYPE TYPE STRING,
MASTER_DATA_STRUCTURE TYPE STRING,
DETERM_PROC TYPE STRING,
SCOPE TYPE STRING,
CASH_ON_DELIVERY TYPE STRING,
NO_DEFAULT_FOR_CALENDAR_FLAG TYPE STRING,
POPULATE_MODE TYPE STRING,
TERRITORY_MANAGEMENT TYPE STRING,
PROCESS_TYPE TYPE STRING,
LATE_FCODE_PROCESSING TYPE STRING,
CHANGEABILITY_CALLBACK TYPE STRING,
MODE TYPE STRING,
FUNCTIONS TYPE STRING,
BUTTONS TYPE STRING,
BUTTON_POSITION TYPE STRING,
SCREEN_LAYOUT TYPE STRING,
FILTER TYPE STRING,
HIDE TYPE STRING,
NO_CHANGE TYPE STRING,
FILTER_DEFINITION TYPE STRING,
NO_CALENDAR_FLAG TYPE STRING,
NO_INACTIVE_FLAG TYPE STRING,
NO_MAINPARTNER_FLAG TYPE STRING,
SINGLE_LINE_SELECTION TYPE STRING,
PARTNER TYPE STRING,
RELATION TYPE STRING,
PARTNER_FROM TYPE STRING,
PARTNER_TO TYPE STRING,
RELATION_TYPE TYPE STRING,
TEAM_GUID TYPE STRING,
X_POS TYPE STRING,
Y_POS TYPE STRING,
TEAM_GUID TYPE STRING,
MESSAGE_INFO TYPE STRING,
FIELDNAME TYPE STRING,
LOGICAL_KEY TYPE STRING,
CUSTOM_SCREEN_PROGRAM TYPE STRING,
CUSTOM_SCREEN_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COMT_PARTNER_SCREEN_LAYOUT_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_COMT_PARTNER_SCREEN_LAYOUT_STR-PARTNERSET sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-SUBSCREEN_ID sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-DESCRIPTION sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-CALLER sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-DOCUMENT_ID sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-OBJECT_ID sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-OBJECT_TYPE sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-MASTER_DATA_STRUCTURE sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-DETERM_PROC sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-SCOPE sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-CASH_ON_DELIVERY sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-NO_DEFAULT_FOR_CALENDAR_FLAG sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-POPULATE_MODE sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-TERRITORY_MANAGEMENT sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-PROCESS_TYPE sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-LATE_FCODE_PROCESSING sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-CHANGEABILITY_CALLBACK sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-MODE sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-FUNCTIONS sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-BUTTONS sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-BUTTON_POSITION sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-SCREEN_LAYOUT sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-FILTER sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-HIDE sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-NO_CHANGE sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-FILTER_DEFINITION sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-NO_CALENDAR_FLAG sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-NO_INACTIVE_FLAG sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-NO_MAINPARTNER_FLAG sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-SINGLE_LINE_SELECTION sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-PARTNER sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-RELATION sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-PARTNER_FROM sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-PARTNER_TO sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-RELATION_TYPE sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-TEAM_GUID sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-X_POS sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-Y_POS sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-TEAM_GUID sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-MESSAGE_INFO sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-FIELDNAME sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-LOGICAL_KEY sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-CUSTOM_SCREEN_PROGRAM sy-vline 
WA_COMT_PARTNER_SCREEN_LAYOUT_STR-CUSTOM_SCREEN_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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