On 11/8/10 5:04 PM, Tom Lane wrote:
> The extra copying is a bit annoying, since
> it would add cycles while accomplishing nothing useful for index
> expressions with no intermediate results, but I'm thinking this is a
> must-fix.

I'd say that performance numbers is what to check on this.  How much
does it affect low-memory expressions to do the copying?

-- 
                                  -- Josh Berkus
                                     PostgreSQL Experts Inc.
                                     http://www.pgexperts.com

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