Re: Prepared statements fail after schema changes with surprising error

From: Andres Freund <andres(at)2ndquadrant(dot)com>
To: Dimitri Fontaine <dimitri(at)2ndQuadrant(dot)fr>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Peter van Hardenberg <pvh(at)pvh(dot)ca>, Peter Geoghegan <peter(dot)geoghegan86(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org Hackers" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Prepared statements fail after schema changes with surprising error
Date: 2013-01-22 13:32:51
Message-ID: 20130122133251.GA7590@awork2.anarazel.de
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On 2013-01-22 14:24:26 +0100, Dimitri Fontaine wrote:
>
> Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> >> DROP SCHEMA public;
> >> CREATE SCHEMA public;
> >
> > changes the OID of schema public, whereas the search_path that's cached
> > for the cached plan is cached in terms of OIDs. So while there is a
> > table named public.z1 at the end of the sequence, it's not in any schema
> > found in the cached search path.
>
> The DROP SCHEMA should invalidate the cached plan, certainly?

Afaics the error happens during replanning of the invalidated plan.

Greetings,

Andres Freund

--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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