Thorsten Schöning wrote:
> > The caveat you mention about IF NOT EXISTS does not apply to
> > temporary tables, as they're not shared across sessions.[...]
>
> That's what I understood as well, but I'm creating those concurrently
> WITHIN one and the same session and transaction. :-)
But a SQL session on the server takes its statements from a FIFO queue
and processes them serially, so there's no intra-session concurrency.
In fact multi-threaded SQL clients *must* make sure that they don't
send concurrent queries to the same connection. The best they can
do in terms of throughput is to queue up a new query while
the server is busy executing a previous one, but that's pipelining,
not parallelism.
Best regards,
--
Daniel Vérité
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