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
>
>