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