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Re: [18] Policy on IMMUTABLE functions and Unicode updates

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: Jeff Davis <pgsql@j-davis.com>
Cc: Peter Eisentraut <peter@eisentraut.org>, Laurenz Albe <laurenz.albe@cybertec.at>, pgsql-hackers@postgresql.org, Daniel Verite <daniel@manitou-mail.org>, Noah Misch <noah@leadboat.com>, Tom Lane <tgl@sss.pgh.pa.us>, Jeremy Schneider <schneider@ardentperf.com>
Date: 2024-07-24T18:47:06Z
Lists: pgsql-hackers 
On Wed, Jul 24, 2024 at 1:45 PM Jeff Davis <pgsql@j-davis.com> wrote:
> There's a qualitative difference between a collation update which can
> break your PKs and FKs, and a ctype update which definitely will not.

I don't think that's true. All you need is a unique index on UPPER(somecol).

-- 
Robert Haas
EDB: http://www.enterprisedb.com