Re: removal of dangling temp tables

Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Fri, Dec 14, 2018 at 11:29 AM Alvaro Herrera
> <alvherre(at)2ndquadrant(dot)com> wrote:
>> I think the best way to fix this is to call RemoveTempRelations()
>> unconditionally at session start (without doing the rest of the temp
>> table setup, just the removal.)

> That would certainly simplify things. I think I thought about that as
> far back as a734fd5d1c309cc553b7c8c79fba96218af090f7 but it seemed
> like a significant behavior change and I wasn't sure that everyone
> would like it. In particular, it adds overhead to backend startup
> that, in the case of a large temp schema, could be fairly long.

> Nevertheless, I tentatively think that a change like this is a good
> idea. I wouldn't back-patch it, though.

I seem to recall discussions about having crash recovery go around
and clean out temp tables. That seems like a better plan than
penalizing every session start with this.

regards, tom lane