| From: | "David E(dot) Wheeler" <david(at)kineticode(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | "Greg Stark" <stark(at)enterprisedb(dot)com>, "Robert Haas" <robertmhaas(at)gmail(dot)com>, "Dimitri Fontaine" <dfontaine(at)hi-media(dot)com>, "Peter Eisentraut" <peter_e(at)gmx(dot)net>, pgsql-hackers(at)postgresql(dot)org, "Michael Meskes" <meskes(at)postgresql(dot)org>, "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com>, "Heikki Linnakangas" <heikki(dot)linnakangas(at)enterprisedb(dot)com>, "Bruce Momjian" <bruce(at)momjian(dot)us>, "Grzegorz Jaskiewicz" <gj(at)pointblue(dot)com(dot)pl> |
| Subject: | Re: WIP: default values for function parameters |
| Date: | 2008-12-14 08:34:22 |
| Message-ID: | 426A6C94-0E76-4E14-99A7-6E4524D40062@kineticode.com |
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| Lists: | pgsql-hackers |
On Dec 14, 2008, at 6:55 AM, Tom Lane wrote:
>> The whole relabeling thing seems like a seriously silly idea.
>
> I wouldn't say that it's silly. What I do say is that it makes no
> sense
> to imagine that it would be used at the same time as named parameters.
> The entire point of something like XMLELEMENT is that it takes a
> list of
> undifferentiated parameters, which therefore do not need to have names
> so far as the function is concerned.
Perhaps not, but I have to say, looking at Robert's JSON example:
> SELECT json(r.foo AS foo, r.bar AS bar, r.baz AS baz, r.bletch AS
> quux) FROM rel r;
I would be pretty confused. It looks exactly like the proposed syntax
for named parameters. So while syntactically they may never be used
together, there's a semantic mismatch, IMHO.
Best,
David
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