Re: Default setting for enable_hashagg_disk

On Thu, Apr 9, 2020 at 7:49 AM Tomas Vondra
<tomas.vondra@2ndquadrant.com> wrote:
> It it really any different from our enable_* GUCs? Even if you do e.g.
> enable_sort=off, we may still do a sort. Same for enable_groupagg etc.

I think it's actually pretty different. All of the other enable_* GUCs
disable an entire type of plan node, except for cases where that would
otherwise result in planning failure. This just disables a portion of
the planning logic for a certain kind of node, without actually
disabling the whole node type. I'm not sure that's a bad idea, but it
definitely seems to be inconsistent with what we've done in the past.

-- 
Robert Haas
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