Re: Index corruption / planner issue with one table in my pg 11.6 instance

From: Peter Geoghegan <pg(at)bowt(dot)ie>
To: Michael Paquier <michael(at)paquier(dot)xyz>
Cc: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Jeremy Finzel <finzelj(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Index corruption / planner issue with one table in my pg 11.6 instance
Date: 2019-12-10 02:56:26
Message-ID: CAH2-Wzk2XJUqVRqRTBVnaTKCW38FOJu7rJTzC1a6Ud_pFLB_CA@mail.gmail.com
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On Mon, Dec 9, 2019 at 6:33 PM Michael Paquier <michael(at)paquier(dot)xyz> wrote:
> Something new as of 11 is that btree indexes can be built in parallel,
> and before releasing it we found some bugs with covering indexes.
> Perhaps we have an issue hidden behind one of these, but hard to be
> sure.

I doubt it.

Jeremy did not report queries that give wrong answers. He only said
that the optimizer refused to use one particular index, before a
VACUUM FULL seemingly corrected the problem. OTOH, Jeremy did report
using contrib/amcheck on the index, which didn't complain. (Note also
that the amcheck functions will throw an error with an !indisvalid
index.)

--
Peter Geoghegan

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