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Subject: Re: Duplicate data even with primary keys enabled
From: Scott Ribe <scott_ribe@elevated-dev.com>
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 <CAHg7=h7hGMWvbhrq6hbQmzX8pEN6_Fp_FmTX8Wy70Yjk=aJ4cQ@mail.gmail.com>
Date: Sat, 29 Oct 2022 09:20:22 -0600
Cc: abbas alizadeh <ramkly@yahoo.com>,
 Erik Wienhold <ewie@ewie.name>,
 Teju Jakkidi vlogs <teja.jakkidi05@gmail.com>,
 Holger Jakobs <holger@jakobs.com>,
 pgsql-admin <pgsql-admin@lists.postgresql.org>
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To: Jayson Hreczuck <jayson.hreczuck@studentuniverse.com>
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> On Oct 29, 2022, at 8:40 AM, Jayson Hreczuck =
<jayson.hreczuck@studentuniverse.com> wrote:
>=20
> Very curious about this too.  Corruption of indexes does occur but =
less than a handful of times in my 30 years of DBA experience, and is =
usually due to hardware failure or some immediate cause.

I've seen it once because of bad hardware, and once because of collation =
changes with a Linux upgrade. That latter one was tricky, because it =
wasn't limited to just non-7-bit characters, but also how hyphens (or =
maybe it was underscores) were handled.=