array_to_string bug?

Folks,

Here's expected behavior:

davidfetter(at)postgres=# SELECT array(values(1),(null));
?column?
──────────
{1,NULL}
(1 row)

The next one is just plain unexpected. Either it's a bug, or it needs
more documentation in the function description in the docs, \df+
output, etc.

davidfetter(at)postgres=# SELECT array_to_string(array(values(1),(null)),'');
array_to_string
─────────────────
1
(1 row)

I would have expected it to come out as NULL.

What say?

Cheers,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
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