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From: Peter Eisentraut <peter_e@gmx.net>
To: pgsql-sql@postgresql.org
Cc: andrew <andrew.ylzhou@gmail.com>
Subject: Re: filtering after join
Date: Thu, 26 Jan 2006 17:59:30 +0100
Message-ID: <200601261759.31184.peter_e@gmx.net> (raw)
In-Reply-To: <29d3b0b90601260454g35817213o7d5a0e8a1e53ddf7@mail.gmail.com>
References: <29d3b0b90601250927o2a5ee6e6mc33a7647da4438ce@mail.gmail.com>
	<200601261222.34906.peter_e@gmx.net>
	<29d3b0b90601260454g35817213o7d5a0e8a1e53ddf7@mail.gmail.com>

andrew wrote:
> How will the query planner do for a nesting query? Treat the
> subqueries as multiple queries and then link them together?
> where can I find the information (codes or documents)?

Look at the execution plan using the EXPLAIN command.

-- 
Peter Eisentraut
http://developer.postgresql.org/~petere/

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