From: Keith Worthington <KeithW@NarrowPathInc.com>
To: PostgreSQL Perform <pgsql-performance@postgresql.org>
Subject: view of view
Date: Wed, 07 Dec 2005 21:47:28 -0500
Message-ID: <43979EC0.1060400@NarrowPathInc.com> (raw)
Hi All,
I am working on an application that uses PostgreSQL. One of the
functions of the application is to generate reports. In order to keep
the code in the application simple we create a view of the required data
in the database and then simply execute a SELECT * FROM
view_of_the_data; All of the manipulation and most of the time even the
ordering is handled in the view.
My question is how much if any performance degradation is there in
creating a view of a view?
IOW if I have a view that ties together a couple of tables and
manipulates some data what will perform better; a view that filters,
manipulates, and orders the data from the first view or a view that
performs all the necessary calculations on the original tables?
--
Kind Regards,
Keith
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To: pgsql-performance@postgresql.org
Cc: KeithW@NarrowPathInc.com
Subject: Re: view of view
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