To: cgg007@yahoo.com
Cc: pgsql-sql@postgresql.org
Subject: Re: Using VIEW to simplify code... 
In-reply-to: <20021119182940.91495.qmail@web13802.mail.yahoo.com> 
References: <20021119182940.91495.qmail@web13802.mail.yahoo.com>
Comments: In-reply-to Chris Gamache <cgg007@yahoo.com>
	message dated "Tue, 19 Nov 2002 10:29:40 -0800"
Date: Tue, 19 Nov 2002 14:47:41 -0500
Message-ID: <22625.1037735261@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>

Chris Gamache <cgg007@yahoo.com> writes:
> Right now I dynamicly generate the SQL for an incredibly ugly 4 table join
> based on user information client-side. I got the bright idea to create a view
> and then run a MUUUCH simpler client-side query on that view. The problem is
> that PostgreSQL apparantly runs the view FIRST and then applies the criteria
> AFTER assembling the whole view.

Not necessarily; it starts with that (which after all is what you wrote)
and tries to transform it into something more efficient.  But it's not
as smart as a person ;-).

> If you MUST have the giant-and-hard-to-maintain-client-generated-sql
> statement and its related explain, I'll produce it.

If you want help, you must provide details.  The PG version number is
relevant also.

			regards, tom lane