| From: | Noah Misch <noah(at)leadboat(dot)com> |
|---|---|
| To: | Kevin Grittner <kgrittn(at)ymail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgreSQL(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: matview scannability rehash (was Re: Drastic performance loss in assert-enabled build in HEAD) |
| Date: | 2013-04-05 14:27:19 |
| Message-ID: | 20130405142719.GA8155@tornado.leadboat.com |
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| Thread: | |
| Lists: | pgsql-hackers |
On Fri, Apr 05, 2013 at 07:00:38AM -0700, Kevin Grittner wrote:
> Noah Misch <noah(at)leadboat(dot)com> wrote:
>
> > The SQL commands I cited as responsible for creating or removing
> > the fork all make a new relfilenode anyway. Thus, "add" actually
> > means creating the fork with the new relfilenode, and "remove"
> > actually means omitting the fork from the new relfilenode. The
> > association between relfilenodes and relations is, of course,
> > transactional.
>
> The same argument applies to the currently-committed code.
True.
--
Noah Misch
EnterpriseDB http://www.enterprisedb.com
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