ABAP Select data from SAP table CMX_PM_S_MESSAGE_DATA into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMX_PM_S_MESSAGE_DATA
*  INTO TABLE @DATA(IT_CMX_PM_S_MESSAGE_DATA2).
*--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_CMX_PM_S_MESSAGE_DATA INDEX 1 INTO DATA(WA_CMX_PM_S_MESSAGE_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMX_PM_S_MESSAGE_DATA>-MANDT = 1.
<CMX_PM_S_MESSAGE_DATA>-MSID = 1.
<CMX_PM_S_MESSAGE_DATA>-WERK = 1.
<CMX_PM_S_MESSAGE_DATA>-MSCLA = 1.
<CMX_PM_S_MESSAGE_DATA>-TSTKZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMX_PM_S_MESSAGE_DATA-SEDAT, sy-vline,
  WA_CMX_PM_S_MESSAGE_DATA-SEUZT, sy-vline,
  WA_CMX_PM_S_MESSAGE_DATA-SOURCE, sy-vline,
  WA_CMX_PM_S_MESSAGE_DATA-ERRKZ, sy-vline,
  WA_CMX_PM_S_MESSAGE_DATA-ARFCIPID, sy-vline,
  WA_CMX_PM_S_MESSAGE_DATA-ARFCPID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMX_PM_S_MESSAGE_DATA 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_CMX_PM_S_MESSAGE_DATA 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_CMX_PM_S_MESSAGE_DATA INTO WA_CMX_PM_S_MESSAGE_DATA.


*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 AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CMX_PM_S_MESSAGE_DATA-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMX_PM_S_MESSAGE_DATA-AUFNR.
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_CMX_PM_S_MESSAGE_DATA_STR, 
MANDT TYPE STRING,
MSID TYPE STRING,
WERK TYPE STRING,
MSCLA TYPE STRING,
TSTKZ TYPE STRING,
SEDAT TYPE STRING,
SEUZT TYPE STRING,
SOURCE TYPE STRING,
ERRKZ TYPE STRING,
ARFCIPID TYPE STRING,
ARFCPID TYPE STRING,
ARFCTIME TYPE STRING,
ARFCTIDCNT TYPE STRING,
SNDALL TYPE STRING,
AUFNR TYPE STRING,
COL TYPE STRING,
STATUS TYPE STRING,
CHKBOX TYPE STRING,
AMPEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMX_PM_S_MESSAGE_DATA_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_CMX_PM_S_MESSAGE_DATA_STR-MANDT sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-MSID sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-WERK sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-MSCLA sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-TSTKZ sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-SEDAT sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-SEUZT sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-SOURCE sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-ERRKZ sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-ARFCIPID sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-ARFCPID sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-ARFCTIME sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-ARFCTIDCNT sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-SNDALL sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-AUFNR sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-COL sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-STATUS sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-CHKBOX sy-vline 
WA_CMX_PM_S_MESSAGE_DATA_STR-AMPEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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