Re: performance benefit with views?

From: Andrew McMillan <andrew(at)catalyst(dot)net(dot)nz>
To: Horst Herb <hherb(at)malleenet(dot)net(dot)au>
Cc: Pgsql Novice <pgsql-novice(at)postgresql(dot)org>
Subject: Re: performance benefit with views?
Date: 2001-11-19 23:42:36
Message-ID: 1006213356.16223.63.camel@kant.mcmillan.net.nz
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-novice

On Mon, 2001-11-19 at 15:02, Horst Herb wrote:
> Is there any performance benefit in Postgres by implementing a complex
> nested query as a view?

No.

> If so, is there anything special I should pay atttention to to get the
> maximum benefit?

No.

In fact there can be a performance impact by using views, particularly
nested views (although this might be fixed in the most recent releases).

<speculation>
At some point there is a 'fabled' query tree redesign coming, and this
may manage to hold statistics for views, which might enable the planner
to work more efficiently on views for which such statistics had been
collected.
</speculation>

Regards,
Andrew.
--
--------------------------------------------------------------------
Andrew @ Catalyst .Net.NZ Ltd, PO Box 11-053, Manners St, Wellington
WEB: http://catalyst.net.nz/ PHYS: Level 2, 150-154 Willis St
DDI: +64(4)916-7201 MOB: +64(21)635-694 OFFICE: +64(4)499-2267

In response to

Browse pgsql-novice by date

  From Date Subject
Next Message Tom Lane 2001-11-20 06:05:15 Re: Triggers & Compiled C Language Functions
Previous Message Tom Lane 2001-11-19 20:46:47 Re: 7.1.3 compilation failure (libpq or aync?)