| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "David E(dot) Wheeler" <david(at)kineticode(dot)com> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: array_agg() NULL Handling |
| Date: | 2010-09-01 18:23:32 |
| Message-ID: | 28324.1283365412@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
"David E. Wheeler" <david(at)kineticode(dot)com> writes:
> On Sep 1, 2010, at 10:30 AM, Tom Lane wrote:
>> Most aggregate functions ignore null inputs, so that rows in which
>> one or more of the expression(s) yield null are discarded. (This
>> can be assumed to be true, unless otherwise specified, for all
>> built-in aggregates.)
> I don't think you need the parentheses, though without them, "This" might be better written as "The ignoring of NULLs".
Done, without the parentheses. I didn't add "The ignoring of NULLs",
it seemed a bit too verbose.
regards, tom lane
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