Trigger a process(IDOC) when Data in Z-table updated

Question

Hi All,
I am working on an interface and the outbound IDOC from R/3 to XI needs to be triggered when a particular field value in a Z*table changes.
So far I am able to trigger the IDOC from the calling Z*prog which updates this table, but I need some exit, PAI etc which will get triggered only when the data in table is updated.
Current Flow chart:
Z-prog starts--->Updates a Z-table--->if sy-subrc=0--->I create an IDOC from the Z-prog itself
What I need:
Z-table is updated--->check if particular filed value changed--->Trigger IDOC
Is it possible to do this.
Many thanks
Shirin

Answer 1

Hi Balu,
I am triggering my IDOCS from the Z*program itself.
The trigger point is when I have successfully updated the table (sy-subrc = 0).
Then I have used the code below to populate my IDOC. I have also maintained a distribution model, so that is the reason I pass only the idoc type in edidc segment and do not pass any port , receiver etc.
Hope you find the code useful.
Regards
Shirin
Reward points if this was helpful.
*Local Data Declaration
  DATA:  wa_msg_header TYPE zca_msg_header,
         wa_edidc      TYPE edidc,
         wa_edidd      TYPE edidd,
         i_edidc       TYPE edidc OCCURS 0,
         i_edidd       TYPE edidd OCCURS 0,
         wa_trailer    TYPE zca_gs_trailer,
         wa_count(10)  TYPE n,
         wa_allocation_response TYPE zca_allocation_response.
*Populate IDOC segments
* 1. Save the message type and the basic IDoc type* in the control segment
  MOVE 'ZMT_ALLOCATION_RESPONSE' TO wa_edidc-mestyp.
  MOVE 'ZGS_ALLOCATION_RESPONSE' TO wa_edidc-idoctp.
* 2. Populate the Genius specific Message Header 'ZCA_MSG_HEADER'
  wa_msg_header-source        = 'SOURCE_SYST'.
  wa_msg_header-destination   = 'DESTINATION-LS.
  wa_msg_header-message_id    = ''.  "Populate this in XI
  wa_msg_header-date_time     = ''.  "populate this in xi.
  wa_msg_header-message_typ   = 'I'.
  wa_msg_header-status        = 'S'.
  MOVE 'ZCA_MSG_HEADER' TO wa_edidd-segnam.
  MOVE wa_msg_header    TO wa_edidd-sdata.
  APPEND wa_edidd       TO i_edidd.
  CLEAR wa_edidd.
* 3 Populate the ALOCATION_RESPONSE segment
  CONCATENATE 'EXAM'
               sy-datum
               sy-uzeit
               INTO
               wa_allocation_response-uid.
* wa_allocation_response-uid                 =  i_set_number  .
  wa_allocation_response-set_number          =  i_set_number .
  wa_allocation_response-trigger             =  '1' .              "Always default to Allocation Change   .
  wa_allocation_response-next_a_exam         =  i_next_a_exam .
  wa_allocation_response-miles_to_a          =  i_miles_to_a .
  wa_allocation_response-next_b_exam         =  i_next_b_exam .
  wa_allocation_response-miles_to_b          =  i_miles_to_b.
  wa_allocation_response-next_major_exam     =  i_next_maj_exam  .
  wa_allocation_response-miles_to_major_exam =  i_miles_to_maj_exam .
  MOVE  'ZCA_ALLOCATION_RESPONSE' TO wa_edidd-segnam.
  MOVE   wa_allocation_response   TO wa_edidd-sdata.
  APPEND wa_edidd                 TO i_edidd.
  CLEAR  wa_edidd.
*4 Populate the Trailer record 'ZCA_TRAILER'
  wa_trailer-data_marker  = 'T'.
  wa_trailer-checksum     = wa_count.
  MOVE 'ZCA_TRAILER' TO wa_edidd-segnam.
  MOVE wa_trailer       TO wa_edidd-sdata.
  APPEND wa_edidd       TO i_edidd.
  CLEAR  wa_edidd.
* Check for distribution model and create the IDOC
  CALL FUNCTION 'MASTER_IDOC_DISTRIBUTE'
    EXPORTING
      master_idoc_control            = wa_edidc
    TABLES
      communication_idoc_control     = i_edidc
      master_idoc_data               = i_edidd
    EXCEPTIONS
      error_in_idoc_control          = 1
      error_writing_idoc_status      = 2
      error_in_idoc_data             = 3
      sending_logical_system_unknown = 4
      OTHERS                         = 5.
* No need for error handling here as the IDOC will be created and ststus record will
* mention the latest ststus including any error message.