Temporary table visibility

Hi all,

I've had a look at through the list archives but haven't found an
answer to this one. Any suggestions appreciated (aside from ones
suggesting that I should not need to do this ;-)...

- A normal table foo is created in a database.
- Clients connect to the database, some create a temp table foo some
don't.

(only one postgresql user is being used to connect to the database if
that matters)

How does a client determine if table foo is temporary or not?

Or put another way...

How can I determine what temporary tables exist in my session,
bearing in mind that other sessions contain temp tables using the
same names?

Many thanks,

James
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