| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Greg Stark <gsstark(at)mit(dot)edu>, Robert Haas <robertmhaas(at)gmail(dot)com>, Martijn van Oosterhout <kleptog(at)svana(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Creation of temporary tables on read-only standby servers |
| Date: | 2010-10-23 13:49:37 |
| Message-ID: | 201010231349.o9NDnb408416@momjian.us |
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| Lists: | pgsql-hackers |
Tom Lane wrote:
> Bruce Momjian <bruce(at)momjian(dot)us> writes:
> > Greg Stark wrote:
> >> It seems to me simpler and more direct to just nail relcache
> >> entries for these objects into memory and manipulate them directly.
> >> They can be constructed from the global catalog tables and then
> >> tweaked to point to the backend local temporary tables.
>
> > Funny, but that is how I implemented temporary tables in 1999 and lasted
> > until 2002 when schema support was added. It actually worked because
> > all the lookups go through the syscache.
>
> ... and as I recall, we got rid of it principally because the temp
> tables weren't visible to ordinary catalog lookups, thus breaking
> all sorts of client-side logic.
Yes, I felt lucky the breakage was so minimal.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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