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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Merlin Moncure <mmoncure@gmail.com>
Cc: Kevin Grittner <Kevin.Grittner@wicourts.gov>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Jon Nelson <jnelson+pgsql@jamponi.net>
Cc: pgsql-bugs@postgresql.org
Subject: Re: [PERFORM] typoed column name, but postgres didn't grump
Date: Thu, 04 Nov 2010 12:56:20 -0400
Message-ID: <11057.1288889780@sss.pgh.pa.us> (raw)
In-Reply-To: <AANLkTikymqi_chTOgpUzmFfA_hCbEQLDwhaA7No_1hgq@mail.gmail.com>
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Merlin Moncure <mmoncure@gmail.com> writes:
> On Thu, Nov 4, 2010 at 12:14 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> "Kevin Grittner" <Kevin.Grittner@wicourts.gov> writes:
>>> Merlin Moncure <mmoncure@gmail.com> wrote:
>>>> create type x as (a int, b int);
>>>> select f((1,2));

>> I think Merlin probably meant to write "select x((1,2))", but that
>> doesn't work out-of-the-box either.  What would be affected is
>> something like

> Actually I didn't -- I left out that there was a function f taking x.

Ah.  No, that would still work after the change.  The case that I'm
proposing to break is using function-ish notation to invoke a cast
from a composite type to some other type whose name you use as if it
were a function.  Even there, if you've created such a cast following
the usual convention of naming the cast function after the target type,
it'll still act the same.  It's just the built-in I/O-based casts that
will stop working this way (for lack of a matching underlying function).

			regards, tom lane



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