Re: Lifetime of FmgrInfo

Joshua Tolley <eggyknap(at)gmail(dot)com> writes:
> It then does some work to determine whether the result in "function" is
> valid or not. So I got to wondering, what's the lifetime of the
> FunctionCallInfoinfo object passed to the call handler function?

Query lifespan, usually. There are counterexamples on both sides,
but as a rule it's expected that it's worthwhile for a function to
cache anything it can in the fcinfo->flinfo->fn_extra structure.
If it's not worthwhile, that's the caller's fault not the function's.

regards, tom lane