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help / color / mirror / Atom feedFrom: Robert Haas <[email protected]>
To: David G. Johnston <[email protected]>
Cc: Haibo Yan <[email protected]>
Cc: jian he <[email protected]>
Cc: Corey Huinker <[email protected]>
Cc: Zsolt Parragi <[email protected]>
Cc: Vik Fearing <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: implement CAST(expr AS type FORMAT 'template')
Date: Fri, 3 Jul 2026 05:49:46 -0400
Message-ID: <CA+TgmobHVgxxof4n6s2yRG-bu_mHpbxWwXkPvinHhkJry_up3A@mail.gmail.com> (raw)
In-Reply-To: <CAKFQuwYATL7bW6yc5CwgZ91aZ2hSH_z9MV=p94DO9SPgG+L2GA@mail.gmail.com>
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On Fri, Jul 3, 2026 at 12:09 AM David G. Johnston
<[email protected]> wrote:
> I'm not sure how to make the design less problematic: format is optional, and for casts that need a format to succeed they provide a default.
But that's not how casts work today. some_date::text shares neither
code nor behavior with to_char(some_date, 'some_built_in_constant').
It's completely separate. We're not going to rethink the basic design
of casts for the sake of CAST(...FORMAT...).
--
Robert Haas
EDB: http://www.enterprisedb.com
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To: [email protected]
Cc: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
Subject: Re: implement CAST(expr AS type FORMAT 'template')
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