From: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
To: Daniel Verite <daniel@manitou-mail.org>
To: Jehan-Guillaume de Rorthais <jgdr@dalibo.com>
Cc: Thomas Munro <thomas.munro@enterprisedb.com>
Cc: Peter Geoghegan <pg@bowt.ie>
Cc: Роман Литовченко <roman.lytovchenko@gmail.com>
Cc: PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>
Subject: Re: BUG #15285: Query used index over field with ICU collation in some cases wrongly return 0 rows
Date: Thu, 3 Sep 2020 10:26:03 +0200
Message-ID: <0df88ec9-90c6-54cb-ca63-7aafa5903b0c@2ndquadrant.com> (raw)
In-Reply-To: <8b6f61c4-eb21-484c-bdc6-e4b8e9f3ee62@manitou-mail.org>
References: <8b6f61c4-eb21-484c-bdc6-e4b8e9f3ee62@manitou-mail.org>
On 2020-09-03 09:41, Daniel Verite wrote:
> Jehan-Guillaume de Rorthais wrote:
>
>> Maybe Daniel has some more experience feedback with other customizations
>
> No, I've just tried various other reorderings, and didn't find any other that
> seems to have the same bug as latn-digit.
> My tests consisted of indexing a large corpus of text and running the
> index through amcheck.
In this case I'm tempted to just leave it alone and write it off as a
bug in ICU. We could potentially inspect the collator object at CREATE
COLLATION time and issues warnings if we find something we know to be buggy.
I don't think we want to make our code uglier and slower for normal uses
to work around a bug in some niche feature in ICU.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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Subject: Re: BUG #15285: Query used index over field with ICU collation in some cases wrongly return 0 rows
In-Reply-To: <0df88ec9-90c6-54cb-ca63-7aafa5903b0c@2ndquadrant.com>
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