Re: BUG #15285: Query used index over field with ICU collation in some cases wrongly return 0 rows

From: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>
To: Jehan-Guillaume de Rorthais <jgdr(at)dalibo(dot)com>, pgsql-bugs(at)lists(dot)postgresql(dot)org
Cc: Daniel Verite <daniel(at)manitou-mail(dot)org>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Peter Geoghegan <pg(at)bowt(dot)ie>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Subject: Re: BUG #15285: Query used index over field with ICU collation in some cases wrongly return 0 rows
Date: 2020-09-08 14:36:23
Message-ID: 995dfda3-344c-8c1a-2397-1bdf54dcbb4f@2ndquadrant.com
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On 2020-09-07 15:27, Jehan-Guillaume de Rorthais wrote:
> Please, find a patch in attachment. It removes the buggy collation from doc and
> adapt existing ones to keep an example of combination of rules.

I agree with this patch in principle. But perhaps we could keep another
reordering example, maybe latin/greek?

> What about adding it as a "known bug"/"will not fix" in
> https://wiki.postgresql.org/wiki/Todo and link it from the doc in a note bloc? I
> strongly feel most user do not know where to find such list of bugs in
> PostgreSQL ecosystem.

If you feel more users will make use of the Todo list in the wiki, feel
free to add something there.

--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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