Re: partitioned tables referenced by FKs

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Jesper Pedersen <jesper(dot)pedersen(at)redhat(dot)com>
Cc: Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: partitioned tables referenced by FKs
Date: 2019-03-21 20:49:28
Message-ID: 20190321204928.GA17535@alvherre.pgsql
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On 2019-Mar-21, Alvaro Herrera wrote:

> I figured this out. It's actually a bug in pg11, whereby we're setting
> a dependency wrongly. If you try to do pg_describe_object() the
> pg_depend entries for tables set up the way the regression test does it,
> it'll fail with a "cache lookup failed for constraint XYZ". In other
> words, pg_depend contains bogus data :-(

Oh, actually, it's not a problem in PG11 ... or at least, it's not THIS
problem in pg11. The bug was introduced by 1d92a0c9f7dd which ended the
DEPENDENCY_INTERNAL_AUTO saga, so the bug is only in master, and that
explains why I hadn't seen the problem before with my posted patch
series.

I think the attached is a better solution, which I'll go push shortly.

--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

Attachment Content-Type Size
shadow.patch text/x-diff 1.7 KB

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