ABAP Select data from SAP table ICL_CMC_MESS_PAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICL_CMC_MESS_PAR
*  INTO TABLE @DATA(IT_ICL_CMC_MESS_PAR2).
*--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_ICL_CMC_MESS_PAR INDEX 1 INTO DATA(WA_ICL_CMC_MESS_PAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICL_CMC_MESS_PAR>-UNDOACTION = 1.
<ICL_CMC_MESS_PAR>-ARBGB = 1.
<ICL_CMC_MESS_PAR>-MSGNR = 1.
<ICL_CMC_MESS_PAR>-SPRAS = 1.
<ICL_CMC_MESS_PAR>-MSGTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICL_CMC_MESS_PAR-TEXT, sy-vline,
  WA_ICL_CMC_MESS_PAR-MESSAGE, sy-vline,
  WA_ICL_CMC_MESS_PAR-XMSGVA, sy-vline,
  WA_ICL_CMC_MESS_PAR-XREQUEST, sy-vline,
  WA_ICL_CMC_MESS_PAR-MSGV1, sy-vline,
  WA_ICL_CMC_MESS_PAR-MSGV2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICL_CMC_MESS_PAR 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_ICL_CMC_MESS_PAR 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_ICL_CMC_MESS_PAR INTO WA_ICL_CMC_MESS_PAR.


*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 ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ICL_CMC_MESS_PAR-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_CMC_MESS_PAR-SPRAS.
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_ICL_CMC_MESS_PAR_STR, 
UNDOACTION TYPE STRING,
ARBGB TYPE STRING,
MSGNR TYPE STRING,
SPRAS TYPE STRING,
MSGTY TYPE STRING,
TEXT TYPE STRING,
MESSAGE TYPE STRING,
XMSGVA TYPE STRING,
XREQUEST TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
CMC_REQUEST_1 TYPE STRING,
REQUEST_NAME_1 TYPE STRING,
CMC_REQUEST_2 TYPE STRING,
REQUEST_NAME_2 TYPE STRING,
CMC_REQUEST_3 TYPE STRING,
REQUEST_NAME_3 TYPE STRING,
CMC_REQUEST_4 TYPE STRING,
REQUEST_NAME_4 TYPE STRING,
SHOW_1 TYPE STRING,
SHOW_2 TYPE STRING,
SHOW_3 TYPE STRING,
SHOW_4 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICL_CMC_MESS_PAR_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_ICL_CMC_MESS_PAR_STR-UNDOACTION sy-vline 
WA_ICL_CMC_MESS_PAR_STR-ARBGB sy-vline 
WA_ICL_CMC_MESS_PAR_STR-MSGNR sy-vline 
WA_ICL_CMC_MESS_PAR_STR-SPRAS sy-vline 
WA_ICL_CMC_MESS_PAR_STR-MSGTY sy-vline 
WA_ICL_CMC_MESS_PAR_STR-TEXT sy-vline 
WA_ICL_CMC_MESS_PAR_STR-MESSAGE sy-vline 
WA_ICL_CMC_MESS_PAR_STR-XMSGVA sy-vline 
WA_ICL_CMC_MESS_PAR_STR-XREQUEST sy-vline 
WA_ICL_CMC_MESS_PAR_STR-MSGV1 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-MSGV2 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-MSGV3 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-MSGV4 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-CMC_REQUEST_1 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-REQUEST_NAME_1 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-CMC_REQUEST_2 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-REQUEST_NAME_2 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-CMC_REQUEST_3 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-REQUEST_NAME_3 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-CMC_REQUEST_4 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-REQUEST_NAME_4 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-SHOW_1 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-SHOW_2 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-SHOW_3 sy-vline 
WA_ICL_CMC_MESS_PAR_STR-SHOW_4 sy-vline      INTO ld_text SEPARATED BY SPACE.

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