| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Craig Ringer <craig(dot)ringer(at)2ndquadrant(dot)com>, Ilya Shkuratov <motr(dot)ilya(at)ya(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: CTE inlining |
| Date: | 2017-05-01 04:22:50 |
| Message-ID: | CAFj8pRAFWxQTQJJ5Fr3F85oFWATTyHt0BoU+0-pXsO6u0nUviA@mail.gmail.com |
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| Lists: | pgsql-hackers |
2017-05-01 1:21 GMT+02:00 Andres Freund <andres(at)anarazel(dot)de>:
> On 2017-04-30 07:19:21 +0200, Pavel Stehule wrote:
> > why we cannot to introduce GUC option - enable_cteoptfence ?
>
> Doesn't really solve the issue, and we've generally shied away from GUCs
> that influence behaviour after a few bad experiences. What if you want
> one CTE inlined, but another one not?
>
It change behave in same sense like enable_nestloop, enable_hashjoin, ...
with same limits.
Regards
Pavel
>
> - Andres
>
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