ABAP Select data from SAP table COMM_CFGNUMDOM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM COMM_CFGNUMDOM
*  INTO TABLE @DATA(IT_COMM_CFGNUMDOM2).
*--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_COMM_CFGNUMDOM INDEX 1 INTO DATA(WA_COMM_CFGNUMDOM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<COMM_CFGNUMDOM>-MANDT = 1.
<COMM_CFGNUMDOM>-KBID = 1.
<COMM_CFGNUMDOM>-CHARID = 1.
<COMM_CFGNUMDOM>-SYMBOLFROM = 1.
<COMM_CFGNUMDOM>-UNITFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_COMM_CFGNUMDOM-VALUECODE, sy-vline,
  WA_COMM_CFGNUMDOM-CVNUMID, sy-vline,
  WA_COMM_CFGNUMDOM-ECMNR, sy-vline,
  WA_COMM_CFGNUMDOM-VALUETYPE, sy-vline,
  WA_COMM_CFGNUMDOM-SYMBOLTO, sy-vline,
  WA_COMM_CFGNUMDOM-UNITTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_COMM_CFGNUMDOM 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_COMM_CFGNUMDOM 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_COMM_CFGNUMDOM INTO WA_COMM_CFGNUMDOM.


*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_COMM_CFGNUMDOM_STR, 
MANDT TYPE STRING,
KBID TYPE STRING,
CHARID TYPE STRING,
SYMBOLFROM TYPE STRING,
UNITFROM TYPE STRING,
VALUECODE TYPE STRING,
CVNUMID TYPE STRING,
ECMNR TYPE STRING,
VALUETYPE TYPE STRING,
SYMBOLTO TYPE STRING,
UNITTO TYPE STRING,
POSNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_COMM_CFGNUMDOM_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_COMM_CFGNUMDOM_STR-MANDT sy-vline 
WA_COMM_CFGNUMDOM_STR-KBID sy-vline 
WA_COMM_CFGNUMDOM_STR-CHARID sy-vline 
WA_COMM_CFGNUMDOM_STR-SYMBOLFROM sy-vline 
WA_COMM_CFGNUMDOM_STR-UNITFROM sy-vline 
WA_COMM_CFGNUMDOM_STR-VALUECODE sy-vline 
WA_COMM_CFGNUMDOM_STR-CVNUMID sy-vline 
WA_COMM_CFGNUMDOM_STR-ECMNR sy-vline 
WA_COMM_CFGNUMDOM_STR-VALUETYPE sy-vline 
WA_COMM_CFGNUMDOM_STR-SYMBOLTO sy-vline 
WA_COMM_CFGNUMDOM_STR-UNITTO sy-vline 
WA_COMM_CFGNUMDOM_STR-POSNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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