This doesn't happen on a fresh initdb. In fact, it doesn't happen even
directly after I load data. It might take a day or two, but eventually
the problem manifests itself. I can reproduce it 100% of the time now.
I've noticed this on 8rc1-5. Josh and I will get you a gdb trace ASAP.
Daniel
Tom Lane wrote:
Josh Berkus <josh@agliodbs.com> writes:
However, we're found that if you run thousands of empty array comparisons in a
few seconds/minutes, eventually the empty array comparison breaks, and you
get:
ERROR: cache lookup failed for function 0
I tried
while true; do echo "select '{}'::INT[] = '{}'::INT[];" ; done | psql regression >/dev/null
on a couple different platforms, with and without INTARRAY (which
isn't invoked by this query anyway, so I doubt it matters). I haven't
seen any misbehavior yet.
If you can reproduce this, please attach to the backend with gdb, set a
breakpoint at errfinish(), and get a stack traceback from the point of
the error.
regards, tom lane
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