| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com> |
| Cc: | "Bruce Momjian" <bruce(at)momjian(dot)us>, "Gregory Stark" <stark(at)enterprisedb(dot)com>, "Grzegorz Jaskiewicz" <gj(at)pointblue(dot)com(dot)pl>, "PostgreSQL Hackers" <pgsql-hackers(at)postgresql(dot)org>, "Peter Eisentraut" <peter_e(at)gmx(dot)net> |
| Subject: | Re: WIP: default values for function parameters |
| Date: | 2008-12-10 17:24:08 |
| Message-ID: | 3568.1228929848@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
"Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com> writes:
> look again
> select c as foo from tab ...
> select fce(c as foo) from tab ...
> when you use AS as param names specification, you change meaning of
> some construct via used context?
Uh, what's your point? AS changes the meaning too. For example in
select foo, bar from (select c as foo, d as bar from ...) ss;
we are using AS to specify the names seen by the outer select.
This seems to me to be quite a close parallel to attaching names
to function parameters.
regards, tom lane
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