Re: Boosting cost estimates for some built-in functions

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Boosting cost estimates for some built-in functions
Date: 2009-10-18 19:44:30
Message-ID: 603c8f070910181244k2699ce1v2fe2b2724bd6118e@mail.gmail.com
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On Sun, Oct 18, 2009 at 3:38 PM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> On Sun, 2009-10-18 at 14:50 -0400, Tom Lane wrote:
>
>> I'd like to suggest boosting the built-in cost estimates for the
>> xxx_has_privilege functions to perhaps 10.  to_tsquery and to_tsvector
>> maybe should be boosted even higher, but I don't have a good specific
>> number in mind.
>
> ISTM we should set up a test that measures the cost, of those and other
> functions.

Benchmarking??? Heresy!

...Robert

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