Re: Under the hood of views

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От David Kerr
Тема Re: Under the hood of views
Дата
Msg-id 20090813230400.GA5860@mr-paradox.net
обсуждение исходный текст
Ответ на Re: Under the hood of views  (Richard Huxton <dev@archonet.com>)
Ответы Re: Under the hood of views  (Greg Stark <gsstark@mit.edu>)
Список pgsql-performance
On Thu, Aug 13, 2009 at 05:28:01PM +0100, Richard Huxton wrote:
- 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.

Perfect, thanks!

Dave

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