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

Re: 30-70 seconds query...

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "alexandre :: aldeia digital" <alepaes(at)aldeiadigital(dot)com(dot)br>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: 30-70 seconds query...
Date: 2003-03-31 22:58:32
Message-ID: 25846.1049151512@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-performance
I said:
> PG 7.4 will be better prepared to handle this sort of query, but I don't
> think it will realize that the T1/T2 left join could be reduced to a
> plain join given these conditions

I take that back --- actually, the algorithm used in CVS tip *does*
deduce that all these left joins can be plain joins.

Don't suppose you'd like to experiment with a current snapshot to see
how well it does for you?

			regards, tom lane


In response to

Responses

pgsql-performance by date

Next:From: scott.marloweDate: 2003-03-31 23:44:32
Subject: Re: 30-70 seconds query...
Previous:From: Tom LaneDate: 2003-03-31 22:17:20
Subject: Re: 30-70 seconds query...

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