Re: Calculation of unused columns - Mailing list pgsql-performance

From Simon Riggs
Subject Re: Calculation of unused columns
Date
Msg-id 1255973775.492.10.camel@ebony
Whole thread Raw
In response to Re: Calculation of unused columns  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Calculation of unused columns  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: Calculation of unused columns  ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>)
List pgsql-performance
On Sat, 2009-10-17 at 21:41 -0400, Tom Lane wrote:

> one thing we'd have to consider
> is whether it is okay to suppress calculation of columns containing
> volatile functions.

I think we should have a 4th class of functions,
volatile-without-side-effects (better name needed, obviously).

That would allow us to optimize such calls away, if appropriate.

--
 Simon Riggs           www.2ndQuadrant.com


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