Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> There is no user-visible mapping, though the number is the process id.
> You could use that. I think you can get the backend process id somehow,
> but I am not sure how. Anyone?
If you're using libpq, there is a function to retrieve the backend's PID
from the PGconn (PQbackendPID). I don't think any of the other client
libraries provide this (yet).
regards, tom lane