Hi Grzegorz,

Is it always the same OID(s)?

Usually this means something somewhere has a link to an OID that has been 
removed.

You could try digging through pg_catalog lookng for an oid column that refers 
to the OID in question.

In my experience, when a slony 1.2.x slave is involved, this usually means a 
relation was dropped without first dropping it from replication using DROP 
TABLE.  In this case it may be a trigger on a table that has been "disabled" by 
slony, it does this by changing pg_trigger.tgrelid to point to an index on the 
table in question rather than the table itself.  Thus when the table is dropped 
the trigger is left behind, pointing to an index that isn't there.  I' probably 
start with "select * from "pg_catalog".pg_trigger where tgrelid = <the OID that 
doesn't exist>", and prune from there.

Glyn

--- On Wed, 12/5/10, Grzegorz Jaśkiewicz <gryz...@gmail.com> wrote:

> From: Grzegorz Jaśkiewicz <gryz...@gmail.com>
> Subject: Re: [GENERAL] 8.3.7, 'cache lookup failed' for a table
> To: pgsql-general@postgresql.org
> Date: Wednesday, 12 May, 2010, 10:33
> anyone please ?
> 
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