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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Jerry Sievers <gsievers19@comcast.net>
Cc: ProPAAS DBA <dba@propaas.com>
Cc: pgsql-admin@postgresql.org
Subject: Re: how to find a pg_toast table's primary table
Date: Tue, 13 Dec 2016 18:46:18 -0500
Message-ID: <6624.1481672778@sss.pgh.pa.us> (raw)
In-Reply-To: <86wpf3qu08.fsf@jerry.enova.com>
References: <d37e27d8-7e83-e077-3e11-a13857a299de@propaas.com>
	<86wpf3qu08.fsf@jerry.enova.com>
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Jerry Sievers <gsievers19@comcast.net> writes:
> ProPAAS DBA <dba@propaas.com> writes:
>> pg_toast.pg_toast_16784
>> How do I find the primary table for this toast table?

> Find the pg_class row with reltoastrelid = $oid-of-toast-table.

After you've done that a couple of times, you'll notice that the numeric
part of the toast table's name is the OID of its parent, so really you
just need to do

select '16784'::regclass;

Confirming the reltoastrelid link is a good idea though.

			regards, tom lane


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