Re: variadic function support - Mailing list pgsql-patches

From Pavel Stehule
Subject Re: variadic function support
Date
Msg-id 162867790807140026v67eaa804kdb15ac848820d49d@mail.gmail.com
Whole thread Raw
In response to Re: variadic function support  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: variadic function support
List pgsql-patches
>
> As far as the "variadic int" versus "variadic int[]" business, I'm
> starting to agree with Pavel that "variadic int[]" offers less potential
> for confusion.  In particular, it seems to make it more obvious for the
> function author that the argument he receives is an array.  Also, the
> other one would mean that what we put into pg_proc.proargtypes doesn't
> agree directly with what the user thinks the argument types are.  While
> I think we could force that to work, it's not exactly satisfying the
> principle of least surprise.
>
>
> One issue that just occurred to me: what if a variadic function wants to
> turn around and call another variadic function, passing the same array
> argument on to the second one?  This is closely akin to the problem
> faced by C "..." functions, and the solutions are pretty ugly (sprintf
> vs vsprintf for instance).  Can we do any better?  At least in the
> polymorphic case, I'm not sure we can :-(.
>
>                        regards, tom lane
>

maybe with some flag like PARAMS?

SELECT least(PARAMS ARRAY[1,2,3,4,5,6])

Regards
Pavel Stehule

pgsql-patches by date:

Previous
From: Teodor Sigaev
Date:
Subject: Re: [HACKERS] GIN improvements
Next
From: "Pavel Stehule"
Date:
Subject: Re: variadic function support