| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Hannu Krosing <hannu(at)2ndquadrant(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, Andres Freund <andres(at)2ndquadrant(dot)com>, Aakash Goel <aakash(dot)bits(at)gmail(dot)com>, Josh Berkus <josh(at)postgresql(dot)org>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Re: xReader, double-effort (was: Temporary tables under hot standby) |
| Date: | 2012-04-30 03:33:28 |
| Message-ID: | CA+TgmoYmbf5RRdQv7+fFVi-ELos0sarn6yxHomqx2jvV9_2s=Q@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Apr 29, 2012 at 11:29 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> On Sun, Apr 29, 2012 at 6:00 PM, Hannu Krosing <hannu(at)2ndquadrant(dot)com> wrote:
>>> So you basically need a large part of postgres for reliably making sense
>>> of WAL.
>
>> Agreed, but I think that's a problem we need to fix and not a
>> tolerable situation at all. If a user can create a type-output
>> function that goes and looks at the state of the database to determine
>> what to output, then we are completely screwed, because that basically
>> means you would need to have a whole Hot Standby instance up and
>> running just to make it possible to run type output functions.
>
> You mean like enum_out? Or for that matter array_out, record_out,
> range_out?
Yeah, exactly. :-(
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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