Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> I doubt it.  Almost nothing in the backend is thread-safe.  You can't
> acquire a heavyweight lock, a lightweight lock, or a spinlock. You
> can't do anything that might elog() or ereport().  None of those
> things are reentrant.

Not to mention palloc, another extremely fundamental and non-reentrant
subsystem.

Possibly we could work on making all that stuff re-entrant, but it would
be a huge amount of work for a distant and uncertain payoff.

			regards, tom lane

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• Re: Multithread Query Planner at 2012-01-24 16:00:15 from Robert Haas

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• Re: Multithread Query Planner at 2012-01-24 16:29:04 from Robert Haas

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