On Nov 26, 2012, at 11:12 AM, Peter Eisentraut <peter_e@gmx.net> wrote:
> Although my intuition would be [], the existing concatenation-like
> aggregates return null for no input rows, so this probably ought to be
> consistent with those.
This annoys me at times, but I wrap such calls in COALESCE() and forget about it. So I agree to keep it consistent with
otherarray-returning aggregate functions.
Best,
David