| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Hannu Krosing <hannu(at)2ndquadrant(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, "David E(dot) Wheeler" <david(at)kineticode(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: RfD: more powerful "any" types |
| Date: | 2009-09-13 19:50:56 |
| Message-ID: | 162867790909131250r9f0ed3t5db1df9592f94536@mail.gmail.com |
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| Lists: | pgsql-hackers |
Hello
>
> ANY [TYPE] and SAME AS [TYPE OF] are syntactic sugar indeed, but they
> are much more SQL-like than needing to write "any" or anyelement(n) as
> argument type or return type
>
I looked on possibilities in gram.y and I thing, type identifiers
"ANY TYPE" is possible without any problems (this should be synonym for "any"),
"SAME AS" needs add "same" keyword to col_name_keywords , i.e. "same"
is prohibited for function names - it should be a problem
regards
Pavel Stehule
I found so pgparser provide some ref type syntax via % symbol. So we
can use following syntax:
CREATE OR REPLACE FUNCTION foo(a ANY TYPE, b a%TYPE)
RETURNS a%TYPE ...
It is not pretty like SAME AS, but I am sure, so this is doable
(parser knows it now)
any other ideas?
regards
Pavel Stehule
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