From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
---|---|
To: | Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr> |
Cc: | PostgreSQL Developers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: minor patch submission: CREATE CAST ... AS EXPLICIT |
Date: | 2011-05-24 20:42:55 |
Message-ID: | 1306269775.14693.9.camel@vanquo.pezone.net |
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Thread: | |
Lists: | pgsql-hackers |
On lör, 2011-05-21 at 15:46 +0200, Fabien COELHO wrote:
> Hello,
>
> Please find attached a minor stylish patch. It compiles and the update
> test cases work for me.
>
> Description:
>
> Add "AS EXPLICIT" to "CREATE CAST"
>
> This gives a name to the default case of "CREATE CAST", which creates a
> cast which must be explicitely invoked.
>
> >From a language definition perspective, it is helpful to have a name for
> every case instead of an implicit fallback, without any word to describe
> it. See for instance "CREATE USER CREATEDB/NOCREATEDB" or "CREATE RULE ...
> DO ALSO/INSTEAD" for similar occurences of naming default cases.
Oddly enough, we did add the DO ALSO syntax much later, and no one
complained about that, as far as I recall.
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