Skip site navigation (1) Skip section navigation (2)

Re: Index on two columns not used

From: Arnaud Lesauvage <thewild(at)freesurf(dot)fr>
To: Heikki Linnakangas <heikki(at)enterprisedb(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Index on two columns not used
Date: 2006-10-18 15:05:48
Message-ID: 453642CC.8070804@freesurf.fr (view raw or flat)
Thread:
Lists: pgsql-performance
Heikki Linnakangas a écrit :
> Arnaud Lesauvage wrote:
>> It is quite typical, yes. It is the base query of a view. In fact, most 
>> views have a lot more joins (they join with all the upper-level tables).
>> But 150ms is OK, indeed.
> 
> If the query using the view does anything more than a "SELECT * FROM 
> view", you should do an explain analyze of the query instead of the 
> definition of the view. The access plan might look very different.

The views are used as linked tables in an Access Frontend.
Some accesses are "select * from view", others might filter 
on a country_id or something similar.
For the moment performance is good, so I think I'll keep a 
normalized database as long as it is possible !

Thanks for your help Heikki !

In response to

pgsql-performance by date

Next:From: Scott MarloweDate: 2006-10-18 15:28:20
Subject: Re: ACCESS EXCLUSIVE lock
Previous:From: Heikki LinnakangasDate: 2006-10-18 14:50:35
Subject: Re: Index on two columns not used

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group