Re: variadic function support

2008/6/25 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
> "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com> writes:
>>> Tom Lane wrote:
>>>> Your point about the syntax is good though. It would be better if
>>>> the syntax were like
>>>> create function foo (a text, variadic b int[])
>>>> or maybe even better
>>>> create function foo (a text, variadic b int)
>
>> I don't see problem with your syntax. It well block combination OUT
>> and VARIADIC parameter - my one request, variadic parameter have to be
>> array.
>
> Well, we should certainly store the parameter type as an array in
> proargtypes, because that makes this feature transparent to all the
> PLs. However, it doesn't follow that the CREATE FUNCTION syntax
> has to specify the array type rather than the element type. I think
> the Java precedent might be good reason to go with using the element
> type in the function declaration.

I afraid so Java syntax isn't good inspiration
http://www.java-tips.org/java-se-tips/java.lang/using-the-varargs-language-feature.html
http://www.clanproductions.com/java5.html

they use symbol ... like specific synonym to [].
public Method getMethod(String name, Class... parameterTypes)

I didn't find any info about vararg in Oracle - it uses collection and
it allows implicit constructors for emulation o variadic functions -
but "variadic" argument isn't scalar too. So I invite any opinions
about it.

Regards
Pavel Stehule

>
> regards, tom lane
>