Accessing others LCR$_ROW_RECORD in same transaction

Question

Hi all,
I'm writing the code for a DML apply handler, may I access others LCR$_ROW_RECORD for other tables than the one current for the apply handler but in the same transaction?
example:
PROCEDURE myApplyHandlerDML(in_any IN ANYDATA) IS
  lcr          SYS.LCR$_ROW_RECORD;
  rc           PLS_INTEGER; 
BEGIN
  rc := in_any.GETOBJECT(lcr);
  ... I need to access others LCR$_ROW_RECORD of other tables but in the same originating transaction
{code}
thanks for any help, bye
aldo                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

Hello Aldo,
The DML Handler works for a single logical change record (LCR). The apply process evaluates a single LCR and and then pass it over to DML Handler (if defined), hence the DML Handler can not see the other LCRs of the same transaction and it does not know know how many more LCRs are going to come to it.
If you would like to access all the LCRs in a transaction, then you will need to instruct the apply process to enqueue the same into another queue as persistent messages (usually LCRs in apply queue are buffered - in memory).
This can be done using DBMS_APPLY_ADM.SET_ENQUEUE_DESTINATION and DBMS_APPLY_ADM.SET_EXECUTE APIs. For this you will have to create a different queue and specify that in SET_ENQUEUE_DESTINATION. Then you can process all the LCRs in the new queue with a procedure (similar to your DML Handler).
Hope this helps.
Thanks,
Rijesh