Re: Largest & Smallest Functions

On Wed, Nov 7, 2018 at 9:48 PM Pavel Stehule <pavel.stehule@gmail.com> wrote:

You can pass variadic arguments as a array

postgres=# \sf smallest
CREATE OR REPLACE FUNCTION public.smallest(VARIADIC anyarray)
 RETURNS anyelement
 LANGUAGE sql
 IMMUTABLE
AS $function$
    SELECT min($1[i]) FROM generate_subscripts($1, 1) g(i);
$function$

postgres=# select smallest(VARIADIC ARRAY[1,2,3]);
┌──────────┐
│ smallest │
╞══════════╡
│        1 │
└──────────┘
(1 row)

That's very helpful and good to know. It's too bad that doesn't work with LEAST/GREATEST, which would eliminate the need for extra functions.

Thanks!

Ken

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