| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "David E(dot) Wheeler" <david(at)kineticode(dot)com> |
| Cc: | 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>, Gregory Stark <stark(at)enterprisedb(dot)com>, Grzegorz Jaskiewicz <gj(at)pointblue(dot)com(dot)pl> |
| Subject: | Re: WIP: default values for function parameters |
| Date: | 2008-12-13 16:27:53 |
| Message-ID: | 26845.1229185673@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
"David E. Wheeler" <david(at)kineticode(dot)com> writes:
> I don't suppose that the position of the label and
> the value on either side of "AS" could be reversible, could it?
No. Consider
SELECT foo(bar AS baz) FROM ...
If the from-clause provides columns named both bar and baz, it would
be impossible to decide what is meant.
regards, tom lane
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