| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | "Shulgin, Oleksandr" <oleksandr(dot)shulgin(at)zalando(dot)de>, Andrew Dunstan <andrew(at)dunslane(dot)net>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Calculage avg. width when operator = is missing |
| Date: | 2015-09-23 22:30:33 |
| Message-ID: | 25306.1443047433@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> writes:
> Tom Lane wrote:
>> Personally I think Alvaro's position is unduly conservative: to the extent
>> that plans change it'd likely be for the better. But I'm not excited
>> enough to fight hard about it.
> I don't really care enough. We have received some complaints about
> keeping plans stable, but maybe it's okay.
The other side of the coin is that there haven't been so many requests for
changing this; more than just this one, but not a groundswell. So 9.5
only seems like a good compromise unless we get more votes for back-patch.
I reviewed the patch and concluded that it would be better to split
compute_minimal_stats into two functions instead of sprinkling it so
liberally with if's. So I did that and pushed it.
regards, tom lane
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