13. The method of claim 1 , wherein the instance of the first primitive event of the multiple primitive events is received in a first session with the database, and wherein the instance of the second primitive event of the multiple primitive events is received in a second session with the database that is a different session than the first session.
29. A machine-readable storage medium storing one or more sequences of instructions which, when executed by one or more processors, causes the one or more processors to perform the method recited in claim 13 .