---- Original message ----
>Date: Wed, 22 Sep 2010 20:54:22 -0400
>From: pgsql-performance-owner@postgresql.org (on behalf of Robert Haas <robertmhaas@gmail.com>)
>Subject: Re: [PERFORM] Useless sort by
>To: Gaetano Mendola <mendola@gmail.com>
>Cc: Tom Lane <tgl@sss.pgh.pa.us>,pgsql-performance@postgresql.org
>
>On Mon, Sep 13, 2010 at 1:09 PM, Gaetano Mendola <mendola@gmail.com> wrote:
>> I see your point, but some functions like: unique, count are not affected
>> by the order of values fed, and I don't think either that unique has to
>> give out the unique values in the same fed order.
>
>Gee, I'd sure expect it to.
Spoken like a dyed in the wool COBOL coder. The RM has no need for order; it's set based. I've dabbled in PG for some
time,and my sense is increasingly that PG developers are truly code oriented, not database (set) oriented.
robert
>
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>Robert Haas
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>The Enterprise Postgres Company
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