Hiroshi Inoue <Inoue@tpf.co.jp> writes:
>> A more serious objection to SearchSysCacheTupleCopy is that once the
>> tuple is copied out of the syscache, there isn't any mechanism to
>> detect whether it's still valid. If an SI message arrives for a
>> recently-copied tuple, we have no way to know if we have a problem
>> or not.
> Is it more serious than doing the wrong thing silently ?
It'd still be doing the wrong thing silently, in my opinion.
This class of bugs has been there since the beginning of Postgres,
so I do not feel that we need to panic about it. Let's take the
time to design and implement a proper solution, rather than expending
effort on a stopgap solution that'll have to be undone later.
regards, tom lane