| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Joe Conway <mail(at)joeconway(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: dblink_get_connections() result for no connections |
| Date: | 2014-12-02 15:47:47 |
| Message-ID: | CA+TgmoYhbC6PaxJVatMWs+=Up-PvLUjYf7L4Z+=ANbD5qjbOHw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Nov 25, 2014 at 3:49 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> While fooling around with the array_agg(anyarray) patch, I noted
> that dblink_get_connections() returns NULL if there are no active
> connections. It seems like an empty array might be a saner
> definition --- thoughts?
I don't think it matters much. I wouldn't break backward
compatibility to change it from this behavior to that one, and if we'd
picked the other one I wouldn't break compatibility to change it to
this behavior. Anybody who cares can wrap a COALESCE() around it.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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