Re: [Proposal] Global temporary tables

Hi,

On 2022-02-27 04:17:52 +0100, Pavel Stehule wrote:
> > You redirect stats from pg_class and pg_statistics to a local hash table.
> > This is pretty hairy :(

As is I think the patch is architecturally completely unacceptable. Having
code everywhere to redirect to manually written in-memory catalog table code
isn't maintainable.


> > I guess you'd also need to handle pg_statistic_ext and ext_data.
> > pg_stats doesn't work, since the data isn't in pg_statistic - it'd need to
> > look
> > at pg_get_gtt_statistics.
>
> Without this, the GTT will be terribly slow like current temporary tables
> with a lot of problems with bloating of pg_class, pg_attribute and
> pg_depend tables.

I think it's not a great idea to solve multiple complicated problems at
once...

Greetings,

Andres Freund