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Re: Under the hood of views

From: Richard Huxton <dev(at)archonet(dot)com>
To: David Kerr <dmk(at)mr-paradox(dot)net>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Under the hood of views
Date: 2009-08-13 16:28:01
Message-ID: 4A843F11.5020805@archonet.com (view raw or flat)
Thread:
Lists: pgsql-performance
David Kerr wrote:
> 
> create view test as
> select a,b,c,d,e,f,g from testtable;
> 
> select a from test;
> 
> (does the engine retrieve b-g?)

Shouldn't - the query just gets rewritten macro-style. I don't think it 
eliminates joins if you don't need any columns, but that's not possible 
without a bit of analysis.

-- 
   Richard Huxton
   Archonet Ltd

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