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Re: WIP json generation enhancements

David E. Wheeler <david@justatheory.com>

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From: "David E. Wheeler" <david@justatheory.com>
To: Peter Eisentraut <peter_e@gmx.net>
Cc: Andrew Dunstan <andrew@dunslane.net>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2012-12-05T17:01:27Z
Lists: pgsql-hackers 
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 other array-returning aggregate functions.

Best,

David