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From: Corey Huinker <corey.huinker@gmail.com>
Date: Wed, 10 Dec 2025 16:54:37 -0500
Message-ID: 
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Subject: Re: CAST(... ON DEFAULT) - WIP build on top of Error-Safe User
 Functions
To: Kirill Reshke <reshkekirill@gmail.com>
Cc: jian he <jian.universality@gmail.com>,
 Vik Fearing <vik@postgresfriends.org>,
	Isaac Morland <isaac.morland@gmail.com>, pgsql-hackers@lists.postgresql.org
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>
> Overall, I think this patch is doing a good thing. Also, are we
> holding it until the next SQL standard release, because sql/23 leaks
> this feature?
>

The impression that I get is that the SQL Standard has become more
descriptive and less prescriptive. It takes things that exist and
builds the standard around those, so by implementing this draft feature, we
help ensure that it makes it into the standard.

This might be counter-intuitive, but that's what dictionaries do: they
describe how the language is used (descriptive), rather than dictate how it
should be used (prescriptive).

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<div dir=3D"ltr"><div class=3D"gmail_quote gmail_quote_container"><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px =
solid rgb(204,204,204);padding-left:1ex">Overall, I think this patch is doi=
ng a good thing. Also, are we<br>
holding it until the next SQL standard release, because sql/23 leaks<br>
this feature?<br></blockquote><div><br></div><div>The impression that I get=
 is that the SQL Standard has become more descriptive and less prescriptive=
. It takes things that exist and builds=C2=A0the standard around those, so =
by implementing this draft feature, we help ensure that it makes it into th=
e standard.</div><div><br></div><div>This might be counter-intuitive, but t=
hat&#39;s what dictionaries do: they describe how the language is used (des=
criptive), rather than dictate how it should be used (prescriptive).</div><=
/div></div>

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