From: Tom Lane <tgl@sss.pgh.pa.us>
To: James Cloos <cloos@jhcloos.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Two tables or three?
Date: Sat, 29 Oct 2005 13:46:06 -0400
Message-ID: <11826.1130607966@sss.pgh.pa.us> (raw)
In-Reply-To: <m33bmkzbnj.fsf@lugabout.cloos.reno.nv.us>
References: <m33bmkzbnj.fsf@lugabout.cloos.reno.nv.us>
James Cloos <cloos@jhcloos.com> writes:
> I'm designing a schema for an app that requires two large blobs per
> row. Given that querying does not hit those, I presume it is
> beneficial to move the blobs out of the main table.
You shouldn't contort your schema artificially in order to do that.
Postgres automatically stores wide fields out-of-line, so if "large"
means "more than a couple KB after compression" then the system will do
this behind the scenes and there's no need for you to do it. See
http://developer.postgresql.org/docs/postgres/storage-toast.html
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, cloos@jhcloos.com
Subject: Re: Two tables or three?
In-Reply-To: <11826.1130607966@sss.pgh.pa.us>
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