Re: Server-side hooks for user session start and session end

On Saturday, September 26, 2015, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com <javascript:;>> writes:
> > 2015-09-26 19:53 GMT+02:00 Nikolai Zhubr <n-a-zhubr(at)yandex(dot)ru
> <javascript:;>>:
> >> And the events of session start and session end would seem quite generic
> >> and usefull anyway?
>
> > I don't know. I am pretty sceptical - from my experience this request was
> > related to unhappy designed projects.
>
> A session-end hook seems pretty problematic to me: you simply cannot
> guarantee that it will run at all. (Consider process crash or server
> abort cases.) So anything built on the assumption that it gets to run
> at session end is going to be inherently unreliable.
>
>
Or even "reset session" as is often used by connection poolers depending on
what semantics are trying to be captured.

David J.