Tom, thank you for the suggestion - it looks like it is working!
I've found another solution by looking into psql source code:
nspname like 'pg_temp%' AND pg_catalog.pg_table_is_visible(C.oid)
can also be added to the query for the purpose.
On 1/3/11, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Konstantin Izmailov <pgfizm@gmail.com> writes:
>> My application creates/uses a temporary table "X" via multiple
>> connections at the same time. Is there a way to determine which
>> pg_temp_N belongs to the current connection?
>
> It seems unlikely that you need to determine that explicitly to solve
> your problem. Just use WHERE C.oid = 'X'::regclass to constrain the
> pg_class query, and forget matching to the schema name at all.
>
> regards, tom lane
>