Re: why do we need two snapshots per query?

Simon Riggs <simon@2ndQuadrant.com> writes:
> Tom, in that earlier thread you said you'd be doing something in this
> release about that. Can you say more about what that was, and will you
> be doing it still?

http://git.postgresql.org/gitweb/?p=postgresql.git&a=commitdiff&h=e6faf910d75027bdce7cd0f2033db4e912592bcc

I think that largely supersedes what I understood your notion of a
one-shot plan to be about, though perhaps I missed something?

I don't think this has a lot to do with what Robert is on about, since
in any situation where a plan is cached for later, we surely are not
going to use the same snapshot to execute it.
        regards, tom lane