How can one set the tracefile identifier for someone else's session??

Is there an easy way to set a tracefile identifier when tracing someone else's session? To trace my own session I simply use something like: alter session set tracefile_identifier='ANDY';

The package DBMS_SYSTEM provides procedures SET_BOOL_PARAM_IN_SESSION and SET_INT_PARAM_IN_SESSION but nothing like SET_VARCHAR_PARAM_IN_SESSION. I have looked a bit on the web but have not found an answer for this. Is it possible?

Thanks and kind regards,

Andy Zitelli

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