From: Tom Lane <tgl@sss.pgh.pa.us>
To: Ron Mayer <rm_pg@cheapcomplexdevices.com>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: TB-sized databases
Date: Tue, 18 Mar 2008 10:49:32 -0400
Message-ID: <25024.1205851772@sss.pgh.pa.us> (raw)
In-Reply-To: <47DF57B3.9090206@cheapcomplexdevices.com>
References: <200803172347.m2HNlCD29489@momjian.us>
<4005.1205800130@sss.pgh.pa.us>
<47DF57B3.9090206@cheapcomplexdevices.com>
Ron Mayer <rm_pg@cheapcomplexdevices.com> writes:
> Would another possible condition for considering
> Cartesian joins be be:
> * Consider Cartesian joins when a unique constraint can prove
> that at most one row will be pulled from one of the tables
> that would be part of this join?
What for? That would still lead us to consider large numbers of totally
useless joins.
regards, tom lane
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, rm_pg@cheapcomplexdevices.com, bruce@momjian.us
Subject: Re: TB-sized databases
In-Reply-To: <25024.1205851772@sss.pgh.pa.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox